Installation Manual Pika Islanding Inverter X7601/X7602/X Part of the Pika Energy Island M

Transcription

1 Installation Manual Pika Islanding Inverter X7601/X7602/X11402 Part of the Pika Energy Island M

2 Islanding Inverter Serial Number: RCP Number:

3 We are commited to quality and constant improvement. If you find any inconsistencies or errors in this document, please notify us at All specifications and descriptions contained in this document are verified to be accurate at the time of printing. However, we reserve the right to make modifications at any time that may result in a change of specification without notice in our pursuit of quality. Check the resources tab at for the latest specifications and manuals Pika Energy, Inc. All rights reserved. All information in this document is subject to copyright and other intellectual property rights of Pika Energy, Inc. This material may not be modified, reproduced or copied, in whole or in part, without the prior written permission of Pika Energy, Inc. and its licensors. Additional information is available upon request. X7601/X7602/X11402 Installation Manual M

4 Table of Contents Table of Contents Section 1: Introduction About This Manual 7 Symbols used in this Manual 7 About Pika Islanding Inverters: X7601/X7602/X Section 2: Safety Specifications General Warnings 9 Safety Shutdown 10 Section 3: Operational Modes Overview Grid Connect 11 Self Supply 12 Clean Backup 12 Priority Backup 13 Zero Export 13 Selecting an Operational Mode 14 Section 4: Installing The Inverter Mounting and Clearances 15 Electrical Connections 17 Overview of Wiring Connections 18 Wiring Procedures 19 Knockout Dimensions and Locations 20 Grounding 21 DC Wiring 22 DC Breaker Sizes and Selection 23 AC Wiring 23 Accessory Wiring 24 Accessory Terminal Block 24 Accessory Supply Voltages 25 Transfer Switch Output 25 CAN Bus and ModBus 26 Current Transformers 26 External Safety Shutdown Switch 27 Grid Sense and Auxiliary Relay 27 Relay Output 28 Grid Sense Lines 29 USB Connection 29 Ethernet Connectivity 29 3 X7601/X7602/X11402 Installation Manual M

5 Table of Contents Section 5: Compliance Note on DC Wiring and NEC 31 Safety Shutdown 31 Voltage and Frequency Trip Thresholds 32 Voltage Trip Thresholds 32 Frequency Trip Thresholds 32 Voltage Trip Thresholds 32 Frequency Trip Thresholds 32 Section 6: Batteries ConX7601/X7602/X11402ecting Batteries to Section 7: System Configurations Grid Connect Mode 35 Battery Based Modes 35 Critical Loads Panel 36 Current Transformers 37 Required Equipment 38 External Transfer Switches 39 Multiple Inverter Installations 40 Grid Connect Mode 40 Backup Modes (Priority and Clean Backup) 41 Self Supply 42 Connecting Non-Pika Energy Equipment 43 Approved Accessories for X7601/X7602/X Revenue Grade Metering 44 Current Transformers 44 External Transfer Switches 44 Section 8: Commissioning and Setup Commissioning the System 45 Connecting Ethernet and REview 48 Installer Tools 50 Installer Portal 50 Section 9: Warranty and Intended Use Intended (normal) Use 51 REBUS INPUT ONLY! 51 Pika Energy Factory Limited Warranty 51 X7601/X7602/X11402 Installation Manual M

6 Table of Contents Section 10: Service and Maintenance Removing wiring compartment cover 55 Replacing the Fan 56 Replacing fuses 57 Battery Maintenance 58 Section 11: Troubleshooting Inverter States and Events 59 Events and Errors 59 Recovery From an Error State 59 Service 59 Technical Support Information 60 Section 12: Technical Reference Terminal Torques 61 Wire Sizing 61 Section 13: Specifications Quick Reference 63 Detailed Ratings 64 Section 14: Notes 5 X7601/X7602/X11402 Installation Manual M

7 this page intentionally left blank X7601/X7602/X11402 Installation Manual M

8 About This Manual Section 1: Introduction About This Manual This Installation Manual provides instructions and recommendations for installing and commissioning Pika Islanding Inverters (X7601/X7602/X11402) for simplified solar-plus-storage. Pika Islanding Inverters are storage-ready inverters that connect to Pika PV Link DC optimizers and smart batteries to form a Pika Energy Island system. This Installation Manual includes full details on mounting, wiring, safety, battery integration, and other key aspects of installing Islanding Inverters. The companion document to this Installation Manual is the Pika Islanding Inverter Operation Manual. Please reference the Operation Manual for complete information on user-configurable features including Device Settings and Operational Modes. Some information on user-configurable features is included here, but is comprehensively detailed in the Operation Manual. Symbols used in this Manual WARNING: This indicates a fact or feature very important for the safety of the user to prevent injury or death and/or which can cause serious hardware damage if not applied appropriately. CAUTION: Presents information to prevent damage to this product EARTH GROUND SYMBOL 7 X7601/X7602/X11402 Installation Manual M

9 Section 1: Introduction About Pika Islanding Inverters: X7601/X7602/X11402 Islanding Inverters connect to the Pika PV Link optimizers to form the Pika Energy Island system for grid-tie solar-plus-storage. Upon the loss of grid power, Islanding Inverters disconnect from the grid and provides AC power to support critical loads. The inverter provides islanding power without an external autotransformer. High voltage smart-batteries connect to Islanding Inverters with no additional storage interface. All Pika Energy products use the REbus 380VDC nanogrid to connect energy sources, storage, loads and the grid. The REbus nanogrid automates the flow of power to enable plug-and-play setup and operation of Pika Energy equipment. For more information about REbus, visit pikaenergy.com. In the diagram below, an X7601 is directly connected to PV Link optimizers and high voltage lithium ion storage on the DC (REbus) line, shown the the left of the inverter. To the right of the inverter are AC lines: 240VAC for grid and home loads, and critical load support up to 50A. Solar Battery Inverter Grid Loads Fig 1. Example Energy Island For project-specific one-line diagrams, contact Pika Energy. X7601/X7602/X11402 Installation Manual M

10 General Warnings Section 2: Safety Specifications IMPORTANT SAFETY INSTRUCTIONS. SAVE THESE INSTRUCTIONS! General Warnings WARNING: DO NOT ATTEMPT TO SELF-INSTALL INVERTER. A QUALIFIED SOLAR INSTALLATION PROFESSIONAL OR ELECTRICIAN MUST INSTALL AND COMMISSION PIKA ENERGY EQUIPMENT. CONTACT PIKA ENERGY FOR A LIST OF AUTHORIZED INSTALLERS IN YOUR REGION. SHOCK RISK: HIGH VOLTAGE ELECTRICITY WARNING: Before installing the Pika Energy Island, read all instructions and caution markings in this guide and installation manual. Consult installation documentation for all other REbus devices on the system. WARNING: Electrical installation in the United States shall be done in accordance with all local electrical codes and/or the National Electrical Code (NEC), ANSI/NFPA 70. WARNING: Electrical installation in Canada shall be done in accordance with all local electrical codes and/or the Canadian Electrical Code. WARNING: Connecting the Pika Energy Island to the electric utility grid must only be done after receiving prior approval from the utility company and installation completed only by qualified personnel/licensed electrician(s). WARNING: This equipment is NOT intended for use with life support equipment or other medical equipment or devices. 9 X7601/X7602/X11402 Installation Manual M

11 Section 2: Safety Specifications Safety Shutdown The Pika Energy Island system can signal to connected devices on REbus to shut down and limit output voltage to a safe level. The red Safety Shutdown button on the front of X7601/X7602/X11402 activates a Safety Shutdown. An external shutdown button may also be installed, given appropriate labeling. See External Safety Shutdown Switch on page 27 of this manual. To enter a Safety Shutdown, press and hold the red button on the front of the inverter. The Safety Shutdown LED will illuminate and the LCD screen will indicate a Safety Shutdown has been initiated. In a system configured to provide backup power, the DC bus will remain energized on loss of AC grid power. Upon entering a Safety Shutdown, a shutdown signal will be transmitted to all devices connected to REbus. In Safety Shutdown, X7601/X7602/X11402 will disconnect from the grid, stop sourcing power to REbus, and immediately disable all sources on REbus by sending a global shutdown signal. All PV Link optimizers will disconnect their output. The Safety Shutdown LED will be illuminated to show that the inverter has entered a Safety Shutdown. DC bus voltage will be displayed on the inverter screen. WARNING: UNLESS THE SYSTEM IS IN A SAFETY SHUTDOWN, LIVE VOLTAGE MAY BE PRESENT, EVEN WHEN THE POWER GRID HAS FAILED AND THERE IS NO SOURCE OF POWER FROM THE SOLAR PANELS. TO ENSURE THE DC BUS IS NOT POWERED, ALWAYS ACTIVATE SAFETY SHUTDOWN BEFORE PERFORMING EMERGENCY OR SERVICE WORK. X7601/X7602/X11402 Installation Manual M

12 Grid Connect Section 3: Operational Modes Overview Note: Some operational modes require current transformers to be installed with the Pika Energy Island. Current Transformers on page 26 of Installation Manual for more information.. Islanding Inverters have several operational modes available for various installation configurations, markets, and applications. X7601/X7602/X11402 prioritizes the distribution of power differently based on the selected operational mode. For information on how to configure a Pika Energy Island installation for each Operational Mode, see System Configurations on page 35 of this manual. Use this chart to select the correct operational mode for X7601/X7602/X Priority Priority Backup Clean Backup Self Supply Grid Connect 1 Charge batteries from bus Charge batteries from bus Support local loads Support local loads 2 Charge batteries Support local Charge batteries Export to grid from grid loads from bus 3 Support local Export to grid Export to grid - loads 4 Export to grid Grid Connect In Grid Connect mode, X7601/X7602/X11402 functions as a conventional grid-tied inverter system. Powering local loads will be prioritized, and when generation exceeds load demand, excess power is exported to the utility for net metering and other credits. Current transformers are optional for this mode. Without current transformers, you will only see the DC power flowing between your solar array, battery (if installed) and loads. Backup power functions are not employed in Grid Connect mode. If the grid is unavailable, the inverter will disconnect and cease exporting power. Batteries are not required for Grid Connect Mode. For applications in which batteries will be connected to the Pika Energy Island at a later date, operate in Grid Connect mode until batteries are installed. 11 X7601/X7602/X11402 Installation Manual M

13 Section 3: Operational Modes Overview Self Supply In Self Supply mode, X7601/X7602/X11402 prioritizes powering local loads using solar and/or stored power first. Current transformers are required for this mode. In this mode, generated solar power will be used to recharge batteries before any power is exported to the grid. This mode is optimal in markets in which net metering is unavailable or unfavorable, making battery-stored power economically more attractive than grid-provided power. Fig. 2.1 Fig. 2.2 Fig. 2.3 If more power is being produced by the solar array than is needed by local loads, X7601/X7602/X11402 will store energy in the battery for later use [Fig. 2.1]. If the battery is full and a surplus of power is available, that surplus is exported to the grid [Fig. 2.2]. When local demand exceeds available solar-generated power (e.g. at night), the battery supplies power to support local loads. [Fig. 2.3] If the battery is depleted and no solar power is available, power is drawn from the grid to power loads as a last-priority source. Clean Backup In Clean Backup mode, Islanding Inverters prioritize keeping batteries charged and ready for grid interruption, using only solar power. Current transformers are optional for this mode. If the battery is not fully charged, X7601/X7602/X11402 will use all available solar power to charge the battery, with the goal of filling the battery before a grid failure. Grid power will not be used to charge batteries in this mode. Fig. 3.1 Fig. 3.2 Fig. 3.3 X7601/X7602/X11402 Installation Manual M

14 Priority Backup When the batteries are full, excess solar power will support local loads. If needed, the grid will provide power to satisfy additional local load demand [Fig. 3.1]. When the battery is fully charged, powering local loads will be prioritized before exporting power to the grid [Fig. 3.2]. When grid service is interrupted, the system will automatically begin islanding, powering local loads with solar power or battery-stored power [Fig. 3.3]. Priority Backup In Priority Backup mode, Islanding Inverters prioritize keeping batteries charged and ready for grid interruption, using solar power or grid power. Charging using renewable power is prioritized. Current transformers are optional for this mode. If the battery is not fully charged, all available solar power will be used to charge the battery, with the goal of filling the battery before a grid failure. If available solar power does not meet bus voltage requirements for recharging the battery, the grid will provide power to expedite battery recharging. Fig. 4.1 Fig. 4.2 Fig. 4.3 If solar and grid power are available, both can be used to charge the battery. With current transformers installed, the system will display the amount of power being drawn from the grid and how much is being consumed by local loads before reaching the battery [Fig. 4.1]. Without current transformers, only DC power being used to charge batteries through the inverter [Fig. 4.2] will be displayed. In the event of a grid failure, the inverter will island. Critical loads and battery charging will be supported by available solar power [Fig. 4.3]. If available solar power is insufficient, critical loads will be supported by battery power. Zero Export In some markets, solar PV systems are prohibited from back-feeding the AC grid at all. For these applications, use Zero Export mode. This is a subset of Self Supply mode. The key difference is 13 X7601/X7602/X11402 Installation Manual M

15 Section 3: Operational Modes Overview that in Zero Export mode, when the batteries are full and there are no loads, rather than sending excess power to the grid, the Pika Energy Island will limit power generation such that it matches the power consumed by local loads resulting in no exported power. Current transformers are required for this mode. Selecting an Operational Mode Which X7601/X7602/X11402 Operational Mode is Best for My Needs? Goal Keep batteries charged as much as possible Keep batteries charged using only solar power Sell to the grid as much as possible Use grid as little as possible Never sell power to the grid* Optimal Inverter Mode Priority Backup Clean Backup Grid Connect Self Supply Zero Export * Required in select markets. X7601/X7602/X11402 Installation Manual M

16 Mounting and Clearances Section 4: Installing The Inverter Proper installation will allow your inverter to operate safely for many years. Pika Islanding Inverters are NEMA 3R rated for outdoor or indoor installation. X7601/X7602/X11402 is intended for upright wall mounting only. Do not mount in any other orientation. Mounting and Clearances The mounting bracket (included in packaging) is designed to provide a stable hanging surface while improving mounting versatility. Standard 16 stud spacing with sufficient lag screws will support X7601/X7602/X Two additional screws are located in the wiring compartment to hold the bottom of the enclosure to the mounting surface. The mounting bracket has clearance holes for 0.25 fasteners with slots to accommodate different spacings. TOP OF ENCLOSURE 1 1/2 2 3/8 16 Fig 6. X7601/X7602/X11402 Mounting Bracket and Clearances 15 X7601/X7602/X11402 Installation Manual M

17 Section 4: Installing The Inverter Front Side Wall Floor Fig 5. X7601/X7602/X11402 Mounting Clearances Bracket Screws x 2 Wall Screws x 2 1. Install Bracket 2. Hang Inverter on Bracket 3. Install Internal Mounting Screws Fig 7. X7601/X7602/X11402 Hanging Bracket X7601/X7602/X11402 Installation Manual M

18 Electrical Connections Four #14 X 2 truss head screws for mounting bracket attachment and enclosure retention are provided upon shipment. All necessary hardware for mounting is provided with the mounting bracket in X7601/X7602/X11402 s packaging. Other mounting hardware of equal or greater strength may be used to mount Islanding Inverters. Pika Islanding Inverters are designed to be mounted upright on a vertical wall only. Observe all mounting clearances as shown. Install X7601/X7602/X11402 in a location that has sufficient space and ventilation for safe operation, following these guidelines: During layout, ensure MINIMUM CLEARANCES on all four sides and in front of the inverter (observe open lid dimensions when planning the location of X7601/X7602/X11402). Mount the wall bracket securely to framing or structural panel using the screws provided, or other appropriate hardware. The assembled inverter weighs 31.6 kg (70 lbs.). WARNING: Do not mount to drywall that lacks framing or another secure anchor. With an assistant, lift the inverter unit, center it over the bracket, and lower gently, aligning the tabs on the wall bracket with the slots on the back of X7601/X7602/X Immediately secure the inverter to the wall with two fasteners through the back wall of the wiring compartment. Ensure X7601/X7602/X11402 is mounted upright with at least 8 inches of clearance surrounding the air intake and exhaust vent as shown. Never obstruct the inverter exhaust louvers, or mount in such a way that splashing water may enter through the louvers. Electrical Connections Wiring methods in accordance with National Electrical Code, ANSI/NFPA 70 are to be strictly followed when installing X7601/X7602/X11402: 1. X7601/X7602/X11402 includes an integrated AC and DC wiring compartment. As such, proper installation techniques should be employed to restrain service loops and to separate AC, DC and isolated circuits. 2. All pressure terminals are factory-installed and securely fastened. Field terminals are intended for copper conductors only. 17 X7601/X7602/X11402 Installation Manual M

19 Section 4: Installing The Inverter 3. Do not use field wiring leads smaller than 18 AWG. 4. All permanently-installed conductors within the X7601/X7602/X11402 are sized in compliance with NEC Table (B)(16) (formerly Table ). 5. All installed conductors must be rated for at least 420V. Overview of Wiring Connections When a critical loads panel is attached to the critical load output of X7601/X7602/X11402, the default state of the internal transfer switch is fed-through mode. In this configuration, the critical loads panel is connected to the breaker in the main panel (supplied from the grid). The critical load output is protected by an integrated 50A breaker. Below is an example of a Pika Energy Island system consisting of the X7601 inverter, four S2501 PV Links and an advanced high voltage battery (380VDC storage). PV Link DC Side 380VDC REbus Nanogrid X7601 Inverter AC Side 240VAC Grid Power Grid Current Transformer (Optional) PV Link 2x 30A2P 2x 20A2P 50A2P Y connectors PV Link Crit. Load Panel AC Main Panel 380V PV Link Storage FOR REFERENCE ONLY: System must be designed and installed by a licensed contractor or engineer in accordance with NEC and local building codes. Refer to Pika String Sizing Guide for solar module configurations with PV Link. 7.6kW Islanding Inverter + PV Link wiring configuration: 2.5kW 7.5kW 10kW Array (2(4 (1 (3 PV PV Links) Link) Fig 8. Example of 10kW Energy Island with HVDC storage and critical loads X7601/X7602/X11402 Installation Manual M

20 Wiring Procedures 30A DC Fuses USB Port AC Critcal Loads 50A Breaker AC Grid Terminals 120/240VAC DC Breaker Terminals +/- 200VDC RJ-45 Ethernet Terminal Accessory Wiring Terminals - 12V Max Ground Bar Grid Sense Lines Relay Output AC Critical Load Terminals 120/240VAC Fig 9. X7601/X7602/X11402 Islanding Inverter wiring compartment Wiring Procedures WARNING: Verify all system voltages are safe before wiring. Even with AC and DC sources disconnected live voltage may still be present. Ensure no dangerous voltages are present on conductors and terminals before wiring. WARNING: Connect leads for each REbus device to the DC Breaker Terminals located at the bottom of the DC Breaker Panel. Observe correct polarity when connecting REbus leads. Torque DC terminals to 1.35 Nm (12 lb-in). WARNING: Connect leads for the AC grid connection and AC critical loads output at the AC Terminal Block. Torque all AC connections to a minimum of 1.5 Nm (13.3 lb-in), not exceeding 1.8 Nm (15.9 lb-in). Critical loads output is available in 240V split phase only. 19 X7601/X7602/X11402 Installation Manual M

21 Section 4: Installing The Inverter WARNING: Critical load terminals are to be wired to a separate subpanel. Never connect critical load lines directly to the main service panel without use of an external transfer switch. Direct connection of critical loads output to the grid will result in damage to the X7601/X7602/X Connect all equipment grounding conductors to the Ground Bar. Torque terminals according to the table given page 22. WARNING: All REbus circuits are ungrounded. Never connect REbus leads to ground. The neutral line is not bonded to ground within the inverter enclosure. Correct grounding and bonding are the responsibility of the installer. Refer to local codes for correct grounding and bonding procedures. Refer to "Grounding" on page 21 for more information on grounding X7601/X7602/X Knockout Dimensions and Locations All knockouts are sized and intended to support armored cable and/or conduit. All knockouts are located on the bottom of the enclosure. Reducing washers may be used to accommodate smaller conduit sizes. To maintain the integrity of X7601/X7602/X11402 s NEMA 3R enclosure, use raintight or wet locations hubs that comply with the requirements in the standard for conduit, tubing, and cable fittings (UL514B). Reference the table below for available knockout sizes and quantities, as well as the following diagram detailing knockout locations. Knockout Size Quantity 1 7 ¾ 2 X7601/X7602/X11402 Installation Manual M

22 Wiring Procedures 3/4 knockouts. All others / /8 2 1/2 3 1/2 4 5/8 5 3/4 11 1/2 12 3/8 13 3/4 16 Fig 10. X7601/X7602/X11402 knockout configuration Grounding means are provided by a grounding bar located at the bottom of the wiring compartment for up to 8 conductors. Minimum 10AWG to 4AWG maximum wire is permitted for installation into the grounding bar. INVERTER ENCLOSURE MUST BE GROUNDED FOR REBUS COMMUNICATION. PV LINK ENCLOSURES MUST BE GROUNDED FOR REBUS COMMUNICATION. Grounding Input and output circuits from X7601/X7602/X11402 are isolated from the enclosure. The neutral line is not bonded to ground within the enclosure. Refer to NEC for grounding and bonding practices. System grounding, when required by Sections , , and of the National Electric 21 X7601/X7602/X11402 Installation Manual M

23 Section 4: Installing The Inverter Code, ANSI/NFPA 70, is the responsibility of the installer. Wire Size (AWG) Torque (Nm) Torque (lb-in) REbus DC Nanogrid conductors (RE+/RE-) shall NOT be grounded. PV array source conductors shall not be directly connected to X7601/X7602/X DC Wiring X7601/X7602/X11402 s DC wiring terminals connect to four two-pole DC circuit breakers. DC terminals and breakers are labeled RE1-RE4. DC wiring terminals are rated for -40 to +130 C and accept 6-18AWG (0.75mm-10.00mm) conductors. DC breakers indicate state and are accessible behind a tool-less hinged cover. Torque DC terminals to 1.35 Nm (12 Lb-In). Conductors must be rated for 90ºC or higher. WARNING: Connect only REbus-compatible devices. Do not connect raw PV string input directly to the inverter. PV must be converted using PV Link. WARNING: Do not connect raw battery output to the inverter. Batteries connected to X7601/X7602/X11402 must be high voltage (nominally 380V) smart batteries that use an internal regulator (DC/DC converter) and onboard battery management software compatible with REbus. WARNING: This unit is not provided with a GFDI device. This inverter or charge controller must be used with an external GFDI device as required by the Article 690 of the National Electrical Code for the installation location. X7601/X7602/X11402 Installation Manual M

24 Wiring Procedures DC Breaker Sizes and Selection Four two-pole 600VDC rated Carling CX DC (magnetic-hydraulic) circuit breakers (UL489, UL489B listed) are included in the X7601/X7602/X11402 enclosure. These breakers serve as means of disconnect as well as overcurrent protection devices (OCPD) for DC circuits connected to Islanding Inverters. Provided DC circuit breakers indicate ON and OFF positions. DC breakers disconnect both ungrounded (+/-) DC conductors simultaneously (NEC ). The DC circuit breakers are connected to the DC wiring terminals via a PC board. All DC system components must connect to the DC bus through a provided DC breaker. Breaker configurations vary between Islanding Inverter models Breaker Rating QTY. per X7601 QTY. per X7602 QTY. per X11402 Min Wire Gauge 30A AWG 20A AWG AC Wiring WARNING: To reduce the risk of fire, do not connect to an AC load center with multiwire branch circuits. AC wiring terminals accept a minimum of 14 AWG (2.08mm 2 ) to maximum 6 AWG (16mm 2 ) wire and are rated for up to 120 C. Seven AC terminals are provided, including both grid and critical load connections. Torque all AC connections to a minimum of 1.5Nm (13.3 lb-in), not exceeding 1.8Nm (15.9 lb-in). It is the responsibility of the installer to provide sufficient overcurrent protection for the Main AC Panel Wiring terminals. Breaker size is not to exceed ampacity of installed conductors. Critical Loads Panel AC Wiring terminals are protected by a factory installed (50A 277VAC rated) breaker. Check local codes for backfed breaker and busbar maximum ampacities. Conductors must be rated for 90ºC or higher. 23 X7601/X7602/X11402 Installation Manual M

25 Section 4: Installing The Inverter WARNING: Critical load terminals are to be wired to a separate subpanel. Never connect critical load lines directly to main service panel, as this will bypass the anti-islanding protection of the inverter. Critical load output will be energized in an islanding configuration and may result in damage to X7601/X7602/X N1 L1 L2 L3 (3p) White Black Red Blue Main Panel AC Wiring N2 Crit. L1 Crit. L2 Crit. White Black Red Critical Loads Panel AC Wiring Fig 11. AC Terminal Block Refer to all applicable codes and regulations when connecting the AC output of X7601/X7602/X11402 to AC distribution equipment. Applicable sections of the NEC may include Article 702, Article 705, through , and (D). Accessory Wiring Accessory Terminal Block A 16-position accessory wiring block provides connections for external current transformers, external transfer switches, Modbus, CAN bus and communications ground connections. The 16-position wiring block accommodates 30 AWG minimum to 12 AWG maximum wires and has a temperature rating of -50 to 100 C. Torque all accessory terminal block connections to a minimum of 0.4Nm (3.5 lb-in) not exceeding 0.5Nm (4.4 lb-in). X7601/X7602/X11402 Installation Manual M

26 Accessory Wiring CTs Switch Comms CT1+ CT1 CT2+ CT2 CT3+ CT3 Trans 12V GND MODB MODA 5V CANL CANH GND STOP GS2 Fig 12. X7601/X7602/X11402 Accessory Terminal Block Accessory Supply Voltages X7601/X7602/X11402 includes isolated 12V (0.5A max) and 5V (0.5A max) lines for powering and driving accessory devices such as transfer switches or external communication modules. One terminal is provided for each supply and several ground connections are available on the accessory terminal block. NOTE: Both outputs may not operate at maximum ratings. An aggregate of 6W is available from both accessory power output lines. (eg. 4W on 12V and 2W on 5V). Transfer Switch Output An open drain transfer switch output is provided for driving 12V transfer switch coils. Fig 13 is a diagram for driving a 12V transfer switch. Connect to 12V and TRANS output on the accessory terminal block. If grid voltage is present on the Grid Sense Lines, power will be provided to the relay coil. Relay state is described by the table below. A delay occurs once grid voltage is established with Minimum On and Off times defined in seconds by setpoints ExtTransMinON and ExtTransMinOFF. See Operation Manual for further details on transfer switch configuration. 25 X7601/X7602/X11402 Installation Manual M

27 Section 4: Installing The Inverter Crit L1 Inverter Accessory Terminal Block Grid L1 Crit L2 Grid L2 Main L1 Main L2 12V Trans Coil Trans. Switch Fig 13. CAN Bus and ModBus An isolated 5V (500mA max) supply is provided for both Modbus and CAN bus communications through the 5V and adjacent GND terminals. Terminating resistors must be connected at the terminal block. No additional space for terminating resistors is provided. Current Transformers Current transformers are connected to CT1+/-, CT2+/- and CT3+/- terminals on the accessory wiring terminal block. Current transformers are required for Self Supply operational mode, and are optional for all other operational modes. Terminals CT1 and CT2 are used in split phase operation, one for each hot line of a split phase service. CT3 is used in three phase operation. A current transformer must be installed around all grid line conductors (either two or three, at the service entrance) to properly sense current flow to the grid. Installation of CTs in the main panel is often a convenient choice. Connect leads from each sensor to the corresponding CT +/- terminals. The inverter will automatically detect the polarity and orientation of both current X7601/X7602/X11402 Installation Manual M

28 Accessory Wiring transformers. At least two current transformers must be installed for configuration of Self Supply mode. External Safety Shutdown Switch Connections for an external Safety Shutdown switch are supplied on the accessory terminal block. Installation of an external switch does not disable the switch mounted on the front cover. If the external switch requires an indicator, the 12V output line may be used to supply the indicator. SAFETY SHUTDOWN STATE: NOT ACTIVE STOP Inverter Accessory Terminal Block N.O. (Normally Open) GND CM (Common) Safety Shutdown Switch N.C. (Normally Closed) Fig 14. If the external Safety Shutdown switch is a locking type switch, be aware that the system will not exit the Safety Shutdown until the switch has been reset. Grid Sense and Auxiliary Relay Grid sense and auxiliary relay connections are terminated via a 3-position connector. The connector accepts 30 AWG minimum and 12 AWG maximum wire. Torque grid sense and auxiliary relay terminations to a minimum of 0.4Nm(3.5 lb-in), not exceeding 0.6Nm (5.3 lb-in). 27 X7601/X7602/X11402 Installation Manual M

29 Section 4: Installing The Inverter Fig 15. Relay Output A relay output provides normally closed, normally open and common dry contacts via a 3-position connector. The relay output toggles on a grid fault and operates in tandem with the Transfer switch output. If grid voltage is present on the grid sense lines, power will be provided to the relay coil. Relay state is described by the table below. A delay occurs once grid voltage is established with minimum on and off times defined in seconds by setpoints ExtTransMinON and ExtTransMinOFF. Relay State Table Relay Function Grid Voltage Present Grid Voltage Below Threshold NC Output Open Closed NO Output Closed Open X7601/X7602/X11402 Installation Manual M

30 USB Connection Grid Sense Lines Grid sense lines are installed in conjunction with a transfer switch to sense the state of the grid during islanded operation. Install grid sense lines on the grid side terminals of the transfer switch. USB Connection A USB type B jack is provided for connection to a service technician s computer. The USB port is intended only for system configuration and troubleshooting using Pika Energy s installer tools (see "Installer Tools" on page 50). No data logging or other software is accessible by the user from the USB port. USB connection is intended for installer and service technician use only. The USB port is unrelated to user-facing monitoring and is NOT used for connecting to Pika Energy s REview online monitoring dashboard. Ethernet Connectivity X7601/X7602/X11402 connects to the internet through an ethernet (RJ45) jack on the inside of the wiring compartment. A functioning internet connection is required to access the REview online monitoring system. No data is logged onboard Islanding Inverters when internet connectivity is unavailable. When running ethernet cable without a conduit, use a cord grip to strain-relieve the ethernet cable through a knockout on the bottom of the inverter enclosure. See "Connecting Ethernet and REview " on page 48 for more details on connecting ethernet and setting up the system s monitoring dashboard. 29 X7601/X7602/X11402 Installation Manual M

31 Section 4: Installing The Inverter this page intentionally left blank X7601/X7602/X11402 Installation Manual M

32 Note on DC Wiring and NEC Section 5: Compliance Note on DC Wiring and NEC Some electricians or installers may be unfamiliar with DC wiring in a residential setting. Please note the following: 1. NEC (G) for DC PV circuits in buildings: 2. NEC (C)(2) for correct DC wiring coloring. 3. NEC 210.5(C)(2) for identification of DC conductors more than 50V, see REbus wiring conventions For all REbus DC wiring please observe the following coloring convention. Mark or flag all conductors as appropriate. It is recommended that REbus plus conductors NOT be green, white, gray or black. It is recommended REbus minus conductors NOT be green, white, gray or red. Wire REbus + (RE+) REbus - (RE-) Ground (GND) Color Red or White with red tape Black or Blue Green or bare wire Safety Shutdown X7601/X7602/X11402 is equipped with a Safety Shutdown function, intended for use in rapid shutdown (NEC ) systems. Pressing and holding the Safety Shutdown button located on the front cover of the inverter will initiate a Safety Shutdown. Upon entering a Safety Shutdown, the inverter sends a shutdown signal to all connected devices on the REbus DC nanogrid until DC power to the inverter is lost. A Safety Shutdown may also be initiated by an external shutdown switch. See External Safety Shutdown Switch on page 27. The inverter will not resume operation until the user exits the Safety Shutdown using the controls on the front of the X7601/X7602/X To exit the Safety Shutdown, press the center button on the keypad. Select Confirm to confirm that you want to exit Safety Shutdown, and then press any key to dismiss the message that appears. Note: If there is an external Safety Shutdown switch installed, the inverter will not recover from the Safety Shutdown until the external switch is released. See the X7601/X7602/X11402 Operation Manual for details on Safety Shutdown. 31 X7601/X7602/X11402 Installation Manual M

33 Section 5: Compliance Voltage and Frequency Trip Thresholds This unit or system is provided with fixed trip limits and shall not be aggregated above 30 kw on a single Point of Common Connection. Voltage Trip Thresholds The following is a table of the default As Shipped fixed voltage trip setpoints. All over voltage and under voltage trip conditions result in a 300-second restart delay time after the trip threshold has been exceeded for the listed number of cycles. Frequency Trip Thresholds The following is a table of the default As Shipped fixed requency trip setpoints. All over frequecy and under frequency trip conditions result in a 300-second restart delay time after the trip threshold has been exceeded for the listed number of cycles. Voltage Trip Thresholds Threshhold Threshold (% of nominal) Default # of Cycles Frequency Trip Thresholds Threshhold Hz Over/ # of cycles Under Nominal OV OF OV OF2 2 6 OV OF OV4 999* 1 OF4 0 1 UV UF UV UF UV3 0 1 UF3 0* 1 UV4 0 1 UF4 0* 1 *Value of 999 indicated a disabled threshold for voltage trips Value of zero indicates a disabled threshold for frequency trips X7601/X7602/X11402 Installation Manual M

34 Connecting Batteries to X7601/X7602/X11402 Section 6: Batteries The Pika Energy Island is compatible with high voltage smart batteries that feature integrated power regulators and battery management systems. Contact Pika Energy for questions regarding specific battery model compatibility. Connecting Batteries to X7601/X7602/X11402 All high voltage batteries should be connected to an appropriately rated DC breaker for over current protection. Follow all manufacturer recommended practices and applicable codes for OCPDs and battery system safety. Never connect batteries directly to REbus without the use of an appropriate battery management system and power converter. Once connected to X7601/X7602/X11402, batteries can be used in operational modes that require storage, including Clean Backup, Priority Backup and Self Supply. 33 X7601/X7602/X11402 Installation Manual M

35 Section 6: Batteries this page intentionally left blank X7601/X7602/X11402 Installation Manual M

36 Grid Connect Mode Section 7: System Configurations Grid Connect Mode In Grid Connect Mode, Islanding Inverters may be installed to either a 240V (split-phase) service or 208V three-phase service depending on model. In a 240V configuration, a X7601/X7602 can output 7.6kW of AC power. In a 208V three-phase configuration, a X11402 can output 11.4kW of AC power. X7601 Inverter PV Array Main AC Panel Critical Loads Panel Internal 50A Critical Load Breaker Fig 19. Single-Inverter Grid Connect (add batteries later) Installation Battery Based Modes Clean Backup Mode, Priority Backup Mode, and Self Supply Mode all use batteries to provide backup power during grid outages. Each of these modes places different priorities on where power is allowed to flow to, and where it is sourced from. The different battery based modes require the use of additional equipment. Equipment you may need includes a dedicated critical loads panel, an external transfer switch, and current transformers. See Required Equipment on page 38 for more information on what additional 35 X7601/X7602/X11402 Installation Manual M

37 Section 7: System Configurations equipment you need for your installation. All battery based modes are available for 240V grids only and require battery storage. Contact Pika Energy for considerations on installing an islanding system where only three-phase 208V service is available. See Selecting an Operational Mode on page 14 for more information on selecting the correct Operational Mode for your situation. X7601 Inverter PV Array Main AC Panel 380VDC Storage Critical Loads Panel Internal 50A Critical Load Breaker Fig 20. Single Inverter Backup Installation Critical Loads Panel A critical loads panel may be installed at the same time as an X7601/X7602/X In a grid connected system, the critical loads panel is optional, but allows for the easy addition of batteries at a later date. To enable backup modes without the use of a critical loads panel refer to External Transfer Switches on page 39. If batteries are installed and the system has been configured in a backup mode, in the event of a grid outage the critical loads will remain energized. The critical loads output will supply 120/240V loads only. X7601/X7602/X11402 Installation Manual M

38 Current Transformers A critical loads panel is not required for grid connected configurations. WARNING: Critical load terminals are to be wired to a separate subpanel. Never connect critical load lines directly to the main service panel without use of an external transfer switch. Direct connection of critical loads output to the grid will result in damage to the inverter. CAUTION: Critical loads output is only to supply 120/240V loads and will NOT support three phase 208V loads. CAUTION: Do not connect critical loads output in parallel with the grid! Current Transformers Current transformers allow measurement of the power to and from the grid. Installation of current transformers is only required in self-supply mode but is optional for all other modes. Do not attach current transformers to critical loads output. Install current transformers on the hot lines of a 120/240V or 208V 3-phase service. See Current Transformers on page 26 for wiring and installation details. 37 X7601/X7602/X11402 Installation Manual M

39 Section 7: System Configurations X7601 Inverter Current Transformer PV Array Main AC Panel 380VDC Storage Critical Loads Panel Internal 50A Critical Load Breaker Fig 21. Single-Inverter Self Supply Installation Required Equipment Each operational mode requires different configurations of batteries and current transformers. Use the table below to determine what additional equipment (beyond the Pika Islanding Inverter and Pika PV Link ) is required to install a given system. Mode Batteries Current transformers Critical Load Panel Grid Connect Not Required Optional Optional Clean Backup Required Optional Required Priority Backup Required Optional Required Self Supply Required Required Optional When installing a Pika Energy Island in Grid Connect Mode with the intent to add batteries later, consider including a critical load panel as part of the original installation. This will facilitate later conversion to one of the battery-based configurations. An integrated 50A breaker is incorporated into X7601/X7602/X11402 to support the critical loads panel. Alternatively, an external transfer switch may be used to backup an existing panel. See External Transfer Switches on page 39, for more information. X7601/X7602/X11402 Installation Manual M

40 External Transfer Switches External Transfer Switches An external transfer switch may be used in situations where a main panel requires backup power. This allows the critical loads output and the grid input to be tied to the same main panel. When the system enters backup mode (priority or clean backup) the transfer switch will disconnect from the grid and the main panel will be supplied from the critical load output on the X7601/X7602/X When grid service returns, the inveter will toggle the transfer switch and resume grid-tied operation. Caution: Critical loads output is only to supply 120/240V loads and will NOT support three phase 208V loads. Grid sense lines, 12V transfer output and GND Transfer Switch 50A2P (internal) AC Output - Critical Loads AC Output - Grid Power 40A2P AC Main Panel Fig 55. Main panel backup configuration using external transfer switch WARNING: Critical load terminals are to be wired to a separate subpanel. Never connect critical load lines directly to the main service panel without use of an external transfer switch. Direct connection of critical loads output to the grid will result in damage to the X7601/X7602/X X7601/X7602/X11402 Installation Manual M

41 Section 7: System Configurations X7601/X7602/X11402 is capable of driving 12V transfer switch coils. The TRANS output (open drain) can be used in conjunction with the 12V supply to change state of the transfer switch. X7601/X7602/X11402 supports use of the Generac GenReady 200A automatic transfer switch. The behavior of the transfer switch is described in the state table below. Other transfer switch equipment may require opposite polarities to achieve desired state functionality. Grid Sense Lines TRANS output Relay State GenReady Transfer Switch State Less than Low Voltage Setpoint Greater than Low Voltage Setpoint High (12V) NO Grid Connected Low (0V) NC Islanded Multiple Inverter Installations For systems requiring more power output multiple inverters may be installed to increase capacity. Depending on the system configuration and site layout there are many ways to connect multiple inverters to achieve desired performance. Any combination of REbus devices may be registered to a single online REview profile. This may include multiple Energy Island systems at a single site, or devices from several locations. See Connecting Ethernet and REview on page 48 for more information on REview. Grid Connect Mode In Grid Connect Mode, two or more Islanding Inverters may share the same panel as long as sufficient ampacity for back-feeding is available. Alternatively, a supply-side connection may be made to support more than a single X7601/X7602/X X7601/X7602/X11402 Installation Manual M

42 Multiple Inverter Installations PV Array Fig 22. Grid Connect AC Parallel Inverters Backup Modes (Priority and Clean Backup) For configuring a system in backup modes with multiple inverters, contact Pika Energy for application-specific support. 41 X7601/X7602/X11402 Installation Manual M

43 Section 7: System Configurations INCORRECT X7601 INVERTERS CORRECT X7601 INVERTERS Shared Critical Load Panel Seperate Critical Load Panels Fig 23. Do not parallel critical loads output Caution: Do not connect the critical loads output from multiple inverters in parallel. Damage to X7601/X7602/X11402 may result! Self Supply For increased capacity in Self Supply Mode, multiple inverters may supply the same AC loads. However, multiple sets of current transformers may be used for sensing grid current in order to prioritize renewable power. Contact Pika energy for help planning a multi-inverter installation in self-supply mode. X7601/X7602/X11402 Installation Manual M

44 Connecting Non-Pika Energy Equipment Inverters Current Transformers PV Array Grid PV Array Main Panel Fig 24. Self supply with multiple inverters Connecting Non-Pika Energy Equipment REbus is designed to integrate Pika Energy equipment. All Pika Energy devices can connect to each other on REbus. Pika Energy inverters and converters can be AC-coupled and DCcoupled to many other manufacturers equipment. However, Pika Energy equipment (including X7601/X7602/X11402) cannot connect to non-pika Energy DC optimizers, non-pika Energy battery chargers, or non-pika Energy wind turbines. Before attempting to connect third party inverters or converters to REbus-enabled devices, please consult with a Pika Energy technician. 43 X7601/X7602/X11402 Installation Manual M

45 Section 7: System Configurations Approved Accessories for X7601/X7602/X11402 Revenue Grade Metering Islanding Inverters are compatible with multiple revenue grade metering options. Contact Pika Energy for recommended equipment based on the size and location of the installation. Current Transformers Current transformers can be used to sense current flowing to and from a service in order to inform operation of the X7601/X7602/X11402 in self supply mode. Manufacturer-approved transformers: LEM 100A 50-60Hz TT 100-SD (1 transformer per leg 120/240V 200A service) External Transfer Switches The X7601/X7602/X11402 is compatible with the #5449 GenReady Advanced Load Center. X7601/X7602/X11402 Installation Manual M

46 Commissioning the System Section 8: Commissioning and Setup After successful installation and wiring of X7601/X7602/X11402 and the Pika PV Link optimizers, the Pika Energy Island system is ready to be commissioned. As many installations have unique parameters, it is important to select the most optimal system mode for each installation. All REbus devices are configured and controlled through the X7601/X7602/X Pika Energy devices are self-discovering and self-configuring on the REbus system. Connected devices will appear on the LCD display. Fig 26. Connected devices appear on home screen. Commissioning the System Commissioning includes four steps: 1. Inverter Power-Up and Device Discovery 2. Selecting and Activating Operational Modes 3. Enabling REbus Devices 4. Connecting and Enabling Ethernet. Before powering up your system for the first time, complete the following system checks: 1. AC voltage within specified range for system configuration (240V split-phase or 208V 3-phase) 2. All wiring terminations are tight and secure. 3. DC wiring field terminations are secure and polarity is correct. 4. DC breakers are OFF. 45 X7601/X7602/X11402 Installation Manual M

47 Section 8: Commissioning and Setup After all these checks are complete, follow the power-up sequence below: 1. Turn on the AC breaker to X7601/X7602/X Select an operational mode The default operational mode is Grid Tie. (see Selecting and Activating Operational Modes on page 47). 3. Enable inverter (see Enabling Devices on page 46). 4. Connect all DC breakers in use and verify that each REbus device is discovered. 5. Enable each REbus device (see Enabling Devices on page 46). 6. If the inverter is to be connected to the internet for remote monitoring and service, verify that the ethernet cable is connected correctly and enable Ethernet. (See Connecting Ethernet and REview on page 48) Enabling Devices All Pika Energy Island devices are enabled and configured individually through the inverter. Before enabling other devices (PV Link, etc.), Enable the inverter. Follow these same steps to enable other devices on the system. To enable: 1. Press the right arrow button on the inverter LCD until the inverter device is displayed. The inverter device page display will read Disabled. 2. Press the center button. 3. Press the down arrow to highlight Enable [Fig. 32] and press the center button. Arrow sideways and press the center button to select Confirm [Fig. 33]. Fig 32. Enabling X7601 Fig 33. Enabling X confirm The inverter is now enabled. In some situations, the inverter may wait up to five minutes or longer before beginning to export power, this is normal. Press the right arrow button until the LCD displays a device page. Follow steps 2 and 3 to enable another device. X7601/X7602/X11402 Installation Manual M