RE10 tenksolar System Overview

RE10 tenksolar System Overview

tenksolar s Approach tenk is best in class for commercial projects 40% more solar per roof, often 80%+ on obstructed roofs More energy per Watt on DC-capped arrays Eliminates safety and fire risk completely Eliminates all regular maintenance requirements Simplifies EPC process to reduce project costs Game changing product for your business Density drives better project returns Returns create financial flexibility to give you a competitive advantage Gives developers and integrators a differentiated product for strategic business growth 2

About tenksolar Founded in 2008 Bloomington, MN based Over 30MW deployed at over 300 sites

Many Opportunities to Fail in Legacy PV System output greatly impacted from: Soiling Shading Damaged cells Uncontrollable Power Source

Conventional Series Solar Limits Performance 30VDC 60VDC 90VDC 600-1000VDC... String or Central Inverter Current flow limited by lowest performing cell on string High voltage induces PID losses / arc risks Modules cannot be turned off Inverters are single point of failure 5

tenksolar Module Minimal Impact from: Soiling Shading Damaged cells Low Voltage Module Level Control

tenk Low-Voltage, Parallel Architecture Bus voltage < 60VDC 240/208/480VAC Internal panel voltage is always < 16VDC = Zero PID Redundant inverters share workload; maximizing uptime Modules sense load, Voc = 0, Jsc = 0 Current flows freely in module without diodes 7

AC Plant RAIS Inverter Bus (RIB) AC Output DC Input 6-12 inverters grouped onto one bus Ship pre-wired Fully fault tolerant; any module can feed any inverter Integrated wear leveling Controlled by Vbus - no digital Optimize efficiency in low light All inverters located at array edges LED-based diagnostics Multiple inverter sources 8

RIB: Industry Standard Components No need to place pedestal or pad Fully pre-wired Inverter Bus Nests inside array Pre-wired AC Disconnect (12-20 kwac) 9

tenk Has Designed Out Most PV Failure Modes Conventional Failure Mode Hot Spots Diode Failures Arc Faults MC Connector Failures Potential Induced Degradation String imbalance, mismatch loss Inverter failure tenk Improvement Impossible: cells are independent multiple current paths through module Impossible: no diodes needed Impossible: 16 PV voltage internal to panel Impossible: no connectors, utility-grade bus connection Impossible: 15V internal maximum module potential Impossible: cells are independent, modules independent Sealed, redundant inverters share power individual failure has nearly no impact on energy 10

Vastly Simpler Operations & Maintenance Operations and Maintenance Need Visual and Mechanical Inspections String Testing Cabling, Breakers, Disconnect and Combiner Box Inspection / Testing Infra-Red Scans Modules Combiner Boxes Inverter Maintenance Spare inventory maintenance Ground Maintenance Insurance Conventional Solar (typical) Frequent and Fast Response Req d Frequent and Fast Response Req d Frequent and Fast Response Req d Frequent and Fast Response Req d Frequent and Fast Response Req d Frequent and Fast Response Req d Frequent and Fast Response Req d As Needed Bi-Annually for All Areas of Site At risk for serious annual premium changes (Dietz & Watson loss, etc) tenksolar Routine roof inspection Not Required Upon Commissioning / Upon Remote Power Drop Detected Not Required Simple Upon Commissioning Only if Remote Power Drop Detected Only if Remote Power Drop Detected None Annually for Aisles Only Classified by underwriters as low voltage Comments Engineered System / No Risk of Faults in System Modules connected in parallel Integrated Self-Diagnostics No Risk of Faults in System Integrated Fault Detect, Low Voltage Eliminates Risk Internal Self-Detection / LED, Low Voltage Minimizes Risk No Risk of Faults in System, Low Voltage Minimizes Risk No Risk of Faults in System, Redundant Inverter Bus Minimizes Impact Future Products can be added seamlessly to system Sun only In aisles for tenk Long term premium risk is lower with tenk 15 10 5 0 O&M $/kw/yr 11

Best-in-Class Safety: Compliance with Next- Generation Codes Built In With No Added Cost Code tenk SolarEdge Enphase Maxim NEC 690.12(2014) Rapid Shutdown NEC 690.12(2017) (<30VDC Inside Array) NEC 690.11(2014) (DC Arc Fault) New UL 1703 System Class Fire Codes Compliant Compliant w/ Limitations* Compliant Not Compliant Compliant Not Compliant Not Compliant Not Compliant Compliant Compliant w/ Limitations* Compliant Not Compliant Compliant Not Compliant Not Compliant Not Compliant * SolarEdge requires system communications to be operational otherwise, must shutdown to meet safety requirements; in tenk systems, no communications is required Clear trend in solar industry towards more stringent fire and safety codes tenk solution is absolutely safe and fire-resistant by design Increased regulation will increase cost of competitive solutions and complicate their product development roadmap going forward 12

We Offer the Industry s Strongest Warranty 25 Year System Warranty 3% LI Degradation First Year 0.2% Degradation thereafter\ 25 years, end-to-end system, inverts, rack, modules. One point of contact tenk Warranty Backs 12% More Energy Over Project Lifetime Independent Engineering Report Available from Leidos Independent Audit Available from SolarBuyer 13

Independently Verified Performance Results Location Time Period Energy Yield Model Accuracy TKS vs c-si Mt. Angel, OR Aug 2012 Jan 2014 w/in 2% 18% vs 10 Tilt May 2012 Apr 2013 w/in 2% 18% vs 40 Tilt Leupp, AZ Nov 2012 Jan 2014 w/in 1% 27% vs 20 Tilt Aug 2012 Jan 2014 w/in 1.5% 21% vs 10 Tilt Aug 2013 Jan 2014 w/in 2% 19% vs 10 Tilt Minneapolis, MN Aug 2013 Jan 2014 w/in 1% 15% vs 10 Tilt Energy Predictions Accuracy: Within 2% Energy Yield Advantage: RAIS XN 15% or more over c-si Low Tilt systems * Excluding effect of snow RAIS XT 15% or more over c-si Low Tilt Systems 14

System Configurations Residential tenk REFLECT tenk DUO

Residential Shade Tolerant Deploy modules in areas that have occasional shading with minimal production impact Gives you more workable roof space for larger arrays Highest Level of Safety System powers down to less than 16V Safe for firefighters Compliant with proposed NEC 2017 changes

REFLECT Highest kwh/kw Reflector Technology Deploy a reflector in the space between rows Only reflects the wavelengths of light the modules can use Benefits Delivers max kwh/kw (1,400 in MN) Acts as a windshield to reduce ballast < 3.5 psf Ideal on DC capped systems

DUO High Density Deployment tenk s design is the most wind friendly. Little or no ballast needed and only ballast at the array perimeter tenk s modules are uniquely tolerant of shading to the cell level. No system allows spacing solar near as tightly tenk s integral rack design eliminates nearly all racking. Install 800W of tenk with the same labor as 300W of Panel Claw or Unirac tenk s integrated inverter bus takes no roof space, no long DC runs, is fault tolerant, no inverter maintenance needed.

DUO: Highest Energy per Area Density 40% more Watts on the Roof Best energy density for the $ in the industry More kwh per roof gives you more to energy to sell Higher DC:AC DC:AC ratios of 1.6-2 allow you to produce the max kwh/ac Reduced Install Cost 800W per rack cuts $/W DC install Fixed costs are spread over more Watts

Industry Leading Density at Best Price Power Density (kwdc/ft 2 ) Energy Density (kwhac/ft 2 ) tenk w/ 20.4% Cells tenk w/ 17.6% Cells Conventional Poly 305W 72 Cell (10 o ) SunPower 327W w/ T-5 Racking SunPower 327W w/ T-10 Racking 17.1 15.2 11.0 15.2 12.4 24.8 22.0 16.7 22.5 19.0 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 - Equipment $ / Ft2 tenk Poly Conventional Poly SunPower T10

More Solar in Same Space = More Profit Metric* Conventional (300W @ 10º) tenk DUO Improvement First Year Output (MWh) 581 837 44.0% System Cost ($ / WDC) $1.77 $1.67 5.6% O&M ($ / kwdc-yr) $12.00 $5.00 58.0% Development Fee ($000) $116 $234 102.0% LCOE ($ / kwh) $0.10 $0.10 N/A 25 Year IRR 10.0% 10.0% N/A tenk Makes Rooftop Solar Projects More Profitable Use this financial flexibility to: Offer a lower PPA and win more projects Offer a better project return if competing for capital, or Harvest a larger development fee and make more profit as in this example * Analysis provided by actual tenk developer/epc customer

Ground Mount Options Driven Pile DUO (1000 kwdc) Helical Pile REFLECT-28 (120 kwdc) Ballasted REFLECT-26 (100 kwdc)

tenk Storage Ready Architecture + - + - + - + - I I Off Grid power Off Grid Inversion 208/240/480VAC Bus voltage < 60VDC Battery can be added easily to existing bus Modules control PV source eliminates $ for secondary charge controller Backup energy source can be added w/ or w/o storage Storage enables time shift of energy export 23

A Game Changer for Your Business Max energy for any constraint DC capped - tenk REFLECT AC capped or space constrained - tenk DUO Best value in solar as a differentiator Delivers highest level of reliability Lightweight design makes it easy on roof Reduced install costs Superior safety Lower engineering and procurement costs Financial flexibility to build your business Higher developer fee Lower PPA price Better return for investors

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