Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 1

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 1 Model/Configuration: ISM 120/240, ISM 120/240-T80, ISM 120, ISM 120-T80 The Apollo Solar Inverter Switchgear Module (ISM) meets all wiring requirements of the United States National Electrical Code as well as the requirements of Underwriters Laboratories UL1741. The Apollo Solar Inverter Switchgear Module (ISM) is designed as a convenient method for installing one or more TSW series Inverters and Apollo Turbocharger. It provides all of the necessary AC and DC circuit breakers and wiring to ease system installation. List of features: Powder coated Aluminum cabinet with all required knock outs to aid in a NEC compliant installation. Inverter mounts above and connects to conveniently positioned DC bus bars. AC wiring is conveniently routed behind the inverter and into the ISM enclosure. Slots provided for 18 ½ (13mm) DIN rail mount circuit breakers. Includes 250A DC circuit breaker, three 277VAC (dual 120/240) DIN rail mounted circuit breakers for Input, output, and generator/utility bypass and necessary cabling. 500A/50mV shunt for battery monitoring. Available Charge Controller mounting / wiring kits. There are two (2) base models of the ISM: ISM120/240 This is configured for split phase 120VAC and 240VAC (in a manner similar to a standard residential service panel). ISM120 This configuration provides 120VAC only (when this option is selected on the TSW inverter) With the addition of a DC circuit breaker pack; ISM-T80-DC Pac (for the T80 TurboCharger); four (4) configurations are possible as shown in Table 1.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 2 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS The Inverter Switchgear Module (ISM) is used in conjunction with a TurboCharger that is capable of processing over 4.8 kw of DC power, and a TSW Inverter that can produce up to 3.6 kw of AC power. These Safety Instructions are to ensure safe installation and operation of the ISM and the equipment it is connected to. Be sure to read the instructions which came with the ISM and all other connected equipment carefully. Inspect the ISM and all other equipment and read all cautionary and instructive markings on all equipment. Be sure to follow all cautions and instructions when installing all equipment. Save this manual, it has important maintenance and operation information. Proper equipment grounding must be performed as directed in the grounding section of this manual. THIS IS THE SYMBOL FOR GROUND: THIS IS THE SYMBOL FOR DIRECT CURRENT (DC): THIS IS THE SYMBOL FOR ALTERNATING CURRENT (AC): Use a minimum of #8 AWG conductors rated for at least 90º C. Torque all connections as recommended in this manual. Apollo Solar requires that all wiring must be done by a licensed electrician or certified technician in accordance to all local and national electrical codes applicable in your jurisdiction. Do not perform electrical work without the proper qualifications. To avoid a risk of fire and electric shock, make sure that existing wiring is in good condition and that wire is not undersized. Do not operate any system components with damaged or substandard wiring. Use only attachments recommended or sold by Apollo Solar or our Authorized Distribution Partners, doing otherwise may result in a risk of fire, electric shock, or injury to persons. To reduce the risk of electrical shock, disconnect all sources of AC and DC power from the ISM before removing the cover and attempting any maintenance or working on any components connected to the ISM. INTENDED USE The ISM is designed for use only with Apollo Solar equipment. Any inappropriate application may result in a fire hazard or personal injury. WARNING The ISM is designed for use in a controlled environment (i.e. for indoor use only). Do not expose this unit to rain, snow, or liquids of any type. Damp environments will significantly shorten the life of this product and installation in damp environments may affect the product warranty. Do not disassemble the ISM. The ISM does not have any user-serviceable parts. Always use insulated tools to reduce the chance of short-circuits when installing or working with the batteries, PV arrays and any other connected equipment. To further reduce the risk of exposure to live circuits remove all jewelry while installing this system. A battery can present a risk of electrical shock, burn from high short circuit current, fire or explosion from vented gas. Observe proper precautions.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 3 EXPLOSIVE GAS PRECAUTIONS Working in the vicinity of lead acid batteries is dangerous. Batteries generate explosive gases during normal operation. Follow all Explosive Gas Safety procedures. To reduce the risk of battery explosion, follow these instructions and those published by the battery manufacturer and supplier. Proper Disposal of Batteries is required. Refer to your local codes for disposal requirements. IMPORTANT Initially, a Midnite Solar MNDC-GFP breaker may be shipped with the T80 Breaker Pac. It is slightly different from those shown in the diagram. Please follow the included instructions when installing.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 4 The ISM must be mounted to the wall prior to mounting the Inverter. The ISM is designed such that the high current (DC) wiring is done first, followed by the mounting of the Inverter and the AC wiring. It also provides an easy means of removing the inverter for service without disconnecting the majority of the wiring. Be sure to allow at least 40 of vertical space for mounting the system (see figure: 1). Installing the ISM: Mount the ISM on the wall using the upper keyholes and lower mounting holes. It is best to mount the unit on a sheet of ¾ plywood securely mounted to the studwork, or sleeper studs securely mounted in the appropriate location to the studwork. Please Note: The cover is removed by removing five (5) Philips head screws. There is no need to remove the screws (star drive) securing the 250A circuit breaker. It is advisable to allow a couple of inches above and below for wiring access. It is also recommended that the bottom of the ISM be mounted 3 4 feet from the floor. The ISM is 11 wide. Multiple units stack tightly together, as shown below, 2 ISMs and a T80 require 30.5 linear inches of wall space (refer to Parallel wiring section). Figure 1: Minimum space required for Inverter Switchgear (including Inverter and Charge Controller)

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 5 Mounting the TSW Inverter: The ISM is designed with two bus bars which align with the Positive and Negative battery terminals on the TSW inverter. Remove the covers, nuts and washers from the terminals, and carefully lift the inverter in place above the ISM and insert the terminal studs into to corresponding holes in the bus bars. While supporting the TSW, screw the TSW to the wall through at least four of the mounting holes (you may have to pre-drill first). Note: The ISM is not designed to support the weight of the TSW for an extended period of time. It is only meant to support the inverter while attaching it to the wall. Once the inverter is secured, attached the washers and nuts provided and tighten to a torque of 5 ft-lbs. Refer to the illustration on the next page for a clearer view of the inverter connection. Note: For additional information on installing the inverter, please refer to the TSW Series User Manual.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 6 This view shows the Inverter mounted above the ISM with the Positive and Negative input connectors aligned with the positive and negative bus bars. Positive and Negative Bus Bars The Charge Controller, if included, may be mounted next (refer to the photo on the next page). It is recommended that the 4/0 AWG battery cables be connected next since they are difficult route with other wiring in place. The final connections are to the load panel and PV array. The recommended wiring order is heaviest to lightest gauge. If a charge controller is installed, wire the DC output (4 AWG) and PV input (6 AWG) circuit breakers. The AC connections to the inverter (8 AWG) are next.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 7 Mounting the TurboCharger: The Apollo TurboCharger T80 is designed to mount on the right side of the ISM. There are ¾ and 1 ¼ knock outs that coincide with those on the left side of the TurboCharger. Knock these out, and using the provided mounting bracket (replace the hanger), attach the TurboCharger to the ISM by connecting the mounting bracket to the top with #10 screws and using ¾ and 1 ¼ conduit connectors (nipples). Screw the TurboCharger to the wall using two screws in the corresponding holes in the wiring compartment of the Turbocharger. Note: For additional information on installing the TurboCharger, please refer to the appropriate TurboCharger Installation and Operation Manual. If a charge controller is not installed (Inverter only application), skip the DC wiring section and proceed to the grounding section.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 8 Photo of connections between ISM and Charge Controller DC wiring: (Refer to the wiring diagrams for specific ISM models beginning on page 15). It is recommended that the DC wiring be done first since this is generally the heavier wiring. Wire the 4/0 battery cables to the 3/8 screw terminal on the 250A circuit breaker (positive) and shunt (negative). Route the provided 3AWG cables through the 1 ¼ conduit connector and connect to the battery (output) terminals of the TurboCharger; Positive from the 100A circuit breaker and Negative from the battery negative bus (top side of shunt). Route the 6 conductor shunt cable through the ¾ conduit connector and plug into the Apollo Shunt connector on the TurboCharger. Connect the 6AWG green ground wire from the ground bus to the ground lug on the inverter (below and to the right of the negative battery connector on the inverter.) Note: All wire should be copper rated at 90 C (Type THHN is recommended). Note: Tighten connections to the following torque specification: 4/0 battery cables: 144-180in-lbs (16.3-20.3 Nm); TurboCharger terminal lugs: 50in-lbs (5.6Nm); 100A circuit breaker: 20in-lbs (2.3Nm); battery negative or ground bus: 45in-lbs (5.1Nm) WARNING Note to qualified service personnel: The 250A DC circuit breaker should not be removed (it is mounted with Star head (Torx type) screws for this reason. Should it become necessary to replace this breaker, assure that the battery cable is disconnected at the battery bank first.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 9 Neutral to ground bond: A 6AWG green ground bond wire is connected from the AC neutral bus bar to the ground bus bar. This is required on all AC systems in North America. This connection must be made at the power source. If the ISM is installed in a stand-alone system (off-grid), the ISM is the power source, and the bond is required to pass inspection. If, however, this application is a UPS or battery backup in a grid tie system, this bond occurs in the main distribution panel, and therefore must be removed from the ISM. The following section offers a full explanation of grounding requirements. Grounding: System Grounding System grounding is often the most misunderstood wiring concept. The subject is more easily discussed if it is divided into three separate subjects. The grounding requirements vary widely by locale and application. Consult local codes and the NEC (ANSI/NFPA 70) for specific requirements. Equipment or Chassis Grounds This is the simplest part of grounding. This involves connecting the metallic chassis of the various enclosures to have them at the same voltage level. This reduces the potential for electric shock. It also provides a path for fault currents to flow resulting in blown fuses or tripped circuit breakers. The size of the connecting conductors should be coordinated with the size of the over current devices involved. Under some circumstances the conduit and enclosures themselves will provide the current paths. Ground Electrodes / Ground Rods There are two purposes of the grounding electrode, also known as a ground rod. The first is to "bleed" off any electrical charge that may accumulate in the electrical system. The second is to provide a path for 'induced electromagnetic energy' or lightning to be dissipated. The size of the conductor to the grounding electrode or grounding system is usually based on the size of the largest conductor in the system. Most systems use a 5/8' (16mm) copper plated rod 6 feet (2meters) long driven in to the earth as a grounding electrode. It is also common to use copper wire placed in the concrete foundation of the building as a grounding system. While either method may be acceptable, the local code will prevail. Connection to the ground electrode should be done with special clamps located above ground where they can be periodically inspected. Well casings and water pipes may be used as grounding electrodes. Under no circumstance should a gas pipe or line be used. Consult local codes and the NEC (ANSI/NFPA 70) for more information. Bonding the Grounding System to the Neutral and Negative Conductors This is the most confusing part of grounding. The purpose is to connect one of the current carrying conductors, usually the AC neutral and DC negative, to the grounding system.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 10 This connection is why we call one of the wires "neutral" in North American electrical systems. You can touch this wire and the grounding system and not receive a shock. When the other ungrounded conductor, the hot or positive, touches the grounding system, current will flow through it to the point of connection to the grounded conductor and back to the source. This will cause the over current protection to shop the flow of current, protecting the system. The point of connection between the grounding system and the current carrying conductor is often called a "bond." It is usually located in the over current protection devices' enclosure. Although the point of connection can be done at the inverter, codes do not generally allow it since the inverter is considered a "serviceable item which may be removed from the system. In residential systems the point of connection is located at the service entrance panel. In some countries the neutral is not bonded to the grounding system. This means you may not know when a fault has occurred since the over current device will not trip unless a "double" fault occurs. This type of system is used in some marine electrical codes. Bonding must be done at only one point in an electrical system. Our systems inherently have two separate electric systems- a DC system and an AC system. This means that two bonding points will occur in all inverter applications. The bonding point will also be connected to the chassis ground conductors. It is common to have two separate conductors connect the ground electrode and the two bonding points. Each conductor should use a separate clamp. AC AC SYSTEM HOT IN HOT OUT NEUTRAL NEUTRAL BUS-BAR DC SYSTEM HOT IN HOT OUT NEUTRAL APOLLO SOLAR TSW INVERTER TO BATTERY DC NEGATIVE BUS-BAR DC AC TRANSFER SWITCH AND FILTER BOARD SYSTEM BONDING JUMPERS GROUNDING ELECTRODE CONDUCTOR GROUND BUS-BAR GROUNDING ELECTRODE CHASSIS GROUND EQUIPMENT GROUND CONDUCTOR CHASSIS GROUND APOLLO SOLAR TSW INVERTER GROUNDING DETAILS Figure 2: Recommended system grounding

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 11 AC Wiring: The ISM is supplied with 2 pole continuous circuit breakers for the generator/line input, and AC input/output bypass switch. The ISM includes several lengths of 8AWG type THHN wire to connect from the inverter to the AC circuit breakers. It is recommended that this type wire be used for all AC interconnects. As shown in the ISM wiring diagram, connect the 8AWG wires from the inverter input and output input and output breakers making certain that L1 and L2 are connected to the same side of the corresponding breaker. Route the wires from the terminal block in the inverter wiring box through the channel under the inverter and into the ISM. Bus bars are provided for easy hookup from a generator or the utility and also for an AC sub-panel. The AC input and output bus bars allow for parallel connection and are available to connect optional lightning or surge arrestors provided by the installer. Routing of AC wires to Inverter Note: All wire should be Copper rated at 90 C (Type THHN is recommended). Note: Tighten connections to the following torque specification: Circuit breaker terminals: 20in-lbs (2.3Nm); Bypass terminal block: 16in-lbs (1.8Nm); Neutral or ground bus: 40in-lbs (4.5Nm)

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 12 Routing of Shunt cable The cabling that connects to the Apollo shunt board are considered low voltage wiring and must be separated from high voltage wiring. The 6 wire modular cable which connects from the shunt board to the T80 must be routed along the top right of the enclosure base to the ¾ knock out which passes to the T80. Tie downs for wire ties have been provided for this purpose. Similarly, the battery voltage sense wires and battery temperature sensor cable must be routed along the battery negative cable.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 13 ISM MODEL / CONFIGURATION Specification ISM120/240 ISM120 ISM120/240-T80 ISM120-T80 Max. Battery Voltage 24V (nominal) 24V (nominal) 24V (nominal) 24V (nominal) Battery Circuit Breaker 250A 250A 250A 250A rating Recommended Battery 4/0AWG 90 C 4/0AWG 90 C 4/0AWG 90 C 4/0AWG 90 C cable (Copper (Cu)) AC Circuit breaker rating Dual mp (x3) Single mp (x3) Dual mp (x3) Single mp (x3) Rec d AC wire gauge (Cu) 8AWG 90 C 8AWG 90 C 8AWG 90 C 8AWG90 C DC Circuit Breaker Pack N/A N/A ISM-T80-DC Pac ISM-T80-DC Pac DC Charge Controller N/A N/A 100Amp 125VDC 100Amp 125VDC Output Circuit Breaker Rating Rec d DC Output wire gauge N/A N/A 3AWG 90 C Cu 3AWG 90 C Cu Max PV DC Voltage N/A N/A 125VDC 125VDC DC PV Input Circuit Breaker N/A N/A 90Amp 125VDC 90Amp 125VDC rating DC GFP Circuit Breaker rating N/A N/A 90Amp 125VDC 0.5A trip 90Amp 125VDC 0.5A trip Rec d DC PV wire gauge N/A N/A 6AWG 90 C Cu 6AWG 90 C Cu Torque spec Battery 144in-lbs (16.3Nm) 144in-lbs 144in-lbs (16.3Nm) 144in-lbs (16.3Nm) cables (16.3Nm) Torque spec Circuit 20in-lbs (2.3Nm) 20in-lbs (2.3Nm) 20in-lbs (2.3Nm) 20in-lbs (2.3Nm) breaker terminals Torque spec Bypass 16in-lbs (1.8Nm) 16in-lbs (1.8Nm) 16in-lbs (1.8Nm) 16in-lbs (1.8Nm) terminal block Torque spec Battery/ Ground/neutral bus bar 40/45in-lbs (4.5/5.1Nm) 40/45in-lbs (4.5/5.1Nm) 40/45in-lbs (4.5/5.1Nm) 40/45in-lbs (4.5/5.1Nm) Torque spec TurboCharger terminals 50in-lbs (5.6Nm) 50in-lbs (5.6Nm) 50in-lbs (5.6Nm) 50in-lbs (5.6Nm) Table 1: Specifications of the various ISM Models and configurations

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 14 WIRING OF AC BREAKERS: The drawing below shows the most popular breaker configuration for North America (as included in model ISM120/240). The circuit breakers are dual AC breakers for split phase 120/240 applications. INVERTER AC 120/240 INPUT / OUTPUT / BYPASS BREAKER PAC AC BUS BARS BYPASS TOGGLE 120/240 VAC MP 2-POLE BREAKERS The 3 dual breakers include 4 bus bars (terminal strips) and the bypass toggle. Starting from the left side is the AC Input to the Inverter/Charger which may be provided AC from the 240VAC grid (aka Line) or from a 240VAC generator. The right most breaker pair controls the AC Output from the inverter to the AC system load. The center pair of breakers is called the Bypass since its function is to allow the inverter to be bypassed from the circuit for maintenance. The bypass toggle allows only one of the breaker pairs to be on at one time. In normal operation, the Input breakers are on, so the Bypass breakers are off thus preventing the flow of current from the AC Output to the AC Input. WIRING INVERTER AC 120/240 INPUT / OUTPUT / BYPASS BREAKER PAC TO INVERTER AC INPUT No. 8 WIRES SUPPLIED WITH KIT FROM INVERTER AC OUTPUT TO GND BUS BAR TO NEUTRAL BUS BAR The wiring diagram on the left shows the most popular AC inverter wiring for the ISM 120/240. The wiring at the top of the diagram is supplied with the ISM. The wiring at the bottom are wires which will be provided by the installer and come from the outside. The base ISM is supplied with the label below affixed to the bezel below the AC breakers: 120/240 VAC 2-POLE BREAKERS FROM LINE OR GENSET BY INSTALLER TO LOAD BY INSTALLER

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 15 The photo on the right shows the AC and DC circuit breakers installed on the ISM DIN rail. The unit has the Generator Selector breaker installed and has the GFP and the DC breakers on the left side for a T80. ADDITION OF A GENERATOR INPUT: It is common that off-grid installations will have a generator to charge the batteries when renewable sources are not available or sufficient. The ISM is designed to provide the circuit breakers for a generator input and to allow the user to switch between using the generator or the grid as the source of AC. IMPORTANT: If the inverter is taken out of service, the AC input wires must be disconnected at the circuit breakers. If you have questions regarding the removal of the inverter, please call Apollo Solar Technical Support at 203-790-6400. GENERATOR INPUT SELECTOR KIT TOGGLE 120/ 240 VAC 40 AMP 2- POLE BREAKER INVERTER AC 120/240 INPUT/ OUTPUT/BYPASS BREAKER PAC AC BUS BARS BYPASS TOGGLE 120/ 240 VAC 40 AMP 2- POLE BREAKERS INVERTER 120/240 INPUT/OUTPUT/BYPASS BREAKER PAC WITH GENERATOR INPUT SELECTOR KIT INSTALLED TO INVERTER AC INPUT FROM INVERTER OUTPUT 120/ 240 VAC 40 AMP 2- POLE BREAKERS ADDING THE GENERATOR INPUT SELECTOR BREAKER TO THE 120/240 BREAKER PAC FROM FROM GENSET GRID OUT TO LOAD As shown in the diagram above, the Generator input breakers and toggle are added to the far left side of the 120/240 AC breakers. In addition, the left hand AC Bus Bars must be moved to the left and jumpers added to tie those Bus Bars to the AC Input breaker pair. The generator input and grid input are now connected directly to the lower terminals of the breakers. The following label is supplied to affix under the AC breakers in this configuration:

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 16 ADDING DC BREAKERS: The block diagram below shows the connections for a typical Negative Ground PV charging system. Note that the PV Input breaker is the first in the series of breakers which provides the ability to disconnect the PV power to the balance of the system. The Ground Fault Protection device is required in the US by NEC and must not be used as a means for disconnection the system since doing so will disconnect the negative from the earth ground. Please Note: It does not matter in what order the PV Disconnect/Overcurrent breaker and GFP breaker are wired (per NEC). PV+ INPUT PV CIRCUIT BREAKER AND GROUND FAULT PROTECTION WIRING PV INPUT DISCONNECT AND OVERCURRENT BREAKER DO NOT TURN THE GFP OFF GROUND FAULT PERTECTION BREAKER GROUND FAULT TRIP BREAKER GND SYSTEM NEGATIVE BUS NOTE: This must be the only place in the system where the Negative Bus is connected to Ground. CHARGE CONTROLLER CHARGE CONTROLLER OUTPUT DISCONNECT AND OVERCURRENT BREAKER TO POSITIVE BATTERY BUS General block diagram for a normal Negative Ground system. Positive Ground systems used in Telecom require differences. Shown below is the DC Breaker pac which may be purchased to easily add the T80 to the Apollo Solar ISM. The breakers have been specially built, tested and certified to UL standards for this application. The pacs also include the mounting bracket and conduit fittings and wiring for easy connection of the Charge Controllers to the ISM and Inverter system. 150V DC BREAKERS 50A T80 BREAKER PAC T80 PV INPUT GFP PV+ 50A 150V DC BREAKERS T80 GFP CC+ IN 50A IN BKR 50A NEG.5A RES GND CC OUTPUT POS BUS 125V DC BREAKERS 50A CC OUT 50A IMPORTANT Initially, a Midnite Solar MNDC-GFP breaker may be shipped with the T80 Breaker Pac. It is slightly different from those shown in the diagram. Please follow the included instructions when installing. The T80 Breaker Pac includes breakers rated for 150volts DC since the T80 can take up to 140 volts Open Circuit. This is true for the GFP as well. The output breaker is made up of 2 50 Amp breakers in parallel to provide the 100 Amp rating required to meet the 125% rule for the 80 Amp output of the T80.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 17 The labels below are provided to be affixed on the bezel beneath the appropriate DC circuit breakers: The photo of the ISM at the left shows the addition of the bezel over the circuit breakers. The bezel protects the contacts from fingers and provides the mounting surface for the toggles used for the Inverter Bypass and the Generator Selector breakers. It is also a convenient location to label the breakers.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 18 PARALLEL INVERTER WIRING IN LINE 0.5 A FUSE OPTIONAL DELTA 302R LIGHTNING ARRESTORS L2 L1 AC IN NEUTRAL AC OUT L2 L1 NEUTRAL AC NEUTRAL BUS GROUND BUS 250A DC BREAKER *GND NOTE AC NEUTRAL BUS GROUND BUS 4/0 GAUGE WIRE 250A DC BREAKER 500A SHUNT 50A 50A RES.5A 45A 45A 45A 45A GND BYPASS AWG #6 BYPASS AWG #6 MAX AWG #8 MAX AWG #8 This illustrates the wiring required for two inverters wired in parallel. The AC terminals allow for the parallel connection in one of the ISMs. Please note that the proper wire gauge (per NEC) must be used to handle the current leaving the ISM (6AWG for 60A total). Please Note: Due to NEC restrictions, the ISM is rated for a maximum of two inverters in parallel. If more than two are required, separate battery cable runs are required, and the AC must be combined at the service panel. Also, to support the increased current load, the sensing shunt must be located externally at the single point negative junction of the battery bank. Please contact Apollo Solar Technical Support for further information. Wiring Diagrams On the following pages are wiring diagrams for the various ISM model configurations as described in Table 1. It is recommended that the installer remove the corresponding sheet from this manual and tape it to the inside cover of the installed ISM for future reference.

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 19 NOTE: AC NEUTRAL AND DC NEGATIVE WIRES ARE WHITE, BUT ARE SHOWN AS LIGHT GRAY. AC OUT AC IN APOLLO SOLAR TSW 3224 APOLLO SOLAR TSW 3224 or TSW 3648 TRUE SINE WAVE INVERTER/CHARGER CAT-5 ETHERNET CABLE INTERNET APOLLO SOLAR SWITCHGEAR MODULE ENCLOSURE MAX AWG #8 TRUE SINE WAVE INVERTER / CHARGER DC IN ASNET ACG-1 APOLLO COMMUNICATION GATEWAY (Optional) AC AC AC IN OPTIONAL DELTA 302R LIGHTNING ARRESTORS L2 L1 AC BREAKERS NEUTRAL 240VAC IN FROM LINE OR GENERATOR BYPASS AC OUT L2 L1 NEUTRAL 240VAC OUT TO LOAD PANEL AC NEUTRAL BUS *GND NOTE CHASSIS EARTH GND WIRED FOR 120/240VAC SPLIT PHASE AWG #6 GROUND BUS 4/0 GAUGE WIRE 250A DC BREAKER 250 BATTERY +BUS 6V BATT 6V BATT 6V BATT - BUS 500A SHUNT INVERTER SWITCHGEAR MODULE ISM 120/240 WIRING DIAGRAM BATTERY BOX AND BATTERIES (MADE BY OTHERS) * GND NOTE: IF THIS POWER CENTER IS THE SOURCE OF THE BUILDING POWER, THE AC NEUTRAL MUST BE CONNECTED TO EARTH GROUND AT THIS POINT ONLY. IF THE SYSTEM HAS AN AC INPUT AT A CIRCUIT BREAKER BOX, THE AC NEUTRAL MUST BE TIED TO GROUND AT THAT SOURCE OF POWER ONLY. 6V BATT BATTERY MAY BE 24 OR 48V DEPENDING ON THE INVERTER. (24 VOLT VERSION SHOWN) STRINGS MAY BE TIED IN PARALLEL FOR MORE AMP-HRS. Wiring Diagram for ISM 120/240 (Installer: Leave at site with unit cut out, fold, and tape inside cover).

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 20 This page intentionally blank

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 21 L1 AC IN NEUTRAL BYPASS AC OUT L1 NEUTRAL *GND NOTE AC NEUTRAL BUS GROUND BUS 4/0 GAUGE WIRE 250A DC BREAKER AWG #6 +BUS 500A SHUNT MAX AWG #8 Wiring Diagram for ISM 120 (Installer: Leave at site with unit cut out, fold, and tape inside cover).

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 22 This page intentionally blank

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 23 Wiring Diagram for ISM 120/240-T80 (Installer: Leave at site with unit cut out, fold, and tape inside cover).

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 24 This page intentionally blank

Apollo Solar Inverter Switchgear Module Installation Manual Rev 1.2 Page 25 NOTE: AC NEUTRAL AND DC NEGATIVE WIRES ARE WHITE, BUT ARE SHOWN AS LIGHT GRAY. AC OUT AC IN APOLLO SOLAR TSW 3224 APOLLO SOLAR TSW 3224 or TSW 3648 TRUE SINE WAVE INVERTER/CHARGER CAT-5 ETHERNET CABLE TRUE SINE WAVE INVERTER / CHARGER INTERNET APOLLO COMMUNICATION GATEWAY (OPTIONAL) OPTIONAL REMOTE DISPLAY APOLLO SOLAR SWITCHGEAR MODULE ENCLOSURE MAX AWG #8 DC IN ASNET ASNET ACG-1 APOLLO SHUNT BOARD Solar Power Center AC AC AC IN OPTIONAL DELTA 302R LIGHTNING ARRESTORS L1 AC BREAKERS NEUTRAL 120VAC IN FROM LINE OR GENERATOR BYPASS AC OUT L1 NEUTRAL 120VAC OUT TO LOAD PANEL AC NEUTRAL BUS *GND NOTE CHASSIS EARTH GND WIRED FOR 120/240VAC SPLIT PHASE * GND NOTE: IF THIS POWER CENTER IS THE SOURCE OF THE BUILDING POWER, THE AC NEUTRAL MUST BE CONNECTED TO EARTH GROUND AT THIS POINT ONLY. IF THE SYSTEM HAS AN AC INPUT AT A CIRCUIT BREAKER BOX, THE AC NEUTRAL MUST BE TIED TO GROUND AT THAT SOURCE OF POWER ONLY. AWG #6 GROUND BUS 4/0 GAUGE WIRE 250A DC BREAKER 250 BATTERY 500A SHUNT +BUS - BUS 6V BATT 6V BATT 6V BATT 6V BATT IN LINE 0.5A FUSE 50A 50A AWG #3 125V DC BREAKERS BATTERY VOLTAGE SENSE WIRES RES.5A GND PV IN APOLLO SOLAR BATTERY TEMPERATURE SENSOR GFP AWG #3 45A 45A PV IN 45A 45A PV ARRAY BATTERY BOX AND BATTERIES (MADE BY OTHERS) BATTERY MAY BE 24 OR 48V DEPENDING ON THE INVERTER. (24 VOLT VERSION SHOWN) STRINGS MAY BE TIED IN PARALLEL FOR MORE AMP-HRS. BAT OUT TurboCharger PV IN GND APOLLO SOLAR T80 PV CHARGE CONTROLLER PV INPUT (UP TO 75A) WIRES MAY BE AS LARGE AS AWG #2 INVERTER SWITCHGEAR MODULE ISM120-T80 WIRING DIAGRAM Wiring Diagram for ISM 120-T80 (Installer: Leave at site with unit cut out, fold, and tape inside cover).