Inverter-Chargers from Morningstar: A. Battery-Based Systems

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1 Inverter-Chargers from Morningstar: A New Power Conversion Platform for Battery-Based Systems January 18, 2018 Kyle Willsey

2 Agenda Current market trends influencing our plans A sneak preview of the MultiWave Highlight common configurations Service, support, and warranty

3 It seems safe to say a Battery Supply Chain Boom is on the way driven by EV demand

4 The residential battery market underwent a transformation last year and it will continue Off-grid and Gridindependent backup have dominated A shift toward grid-tied storage is happening Morningstar is building products for these growing segments Source: GTM Research U.S. Residential Battery Storage Playbook 2017

5 Most solar customers are concerned about outages and half are interested in backup

6 Yet there is not a single definition of what backup power means to homeowners

7 For now, generators provide backup within budget but batteries are too costly Source: Greentech Media

8 Self-Consumption is also driving demand for batteries

9 In general manufacturers have responded with adaptations of old inverter technology Low-frequency transformers with limited ability for power control, conditioning or protections Complex, slow, unreliable legacy programming interfaces Proprietary data protocols with additional hardware required Frequent software patches, unknown hardware upgrade paths increase risk of obsolescence

10 We had already engineered a 600Vdc-rated passively-cooled charger Breakthroughs achieved in the lab on the DC side paved the way for AC improvements The Tristar MPPT became the engine for the charger With a larger heat sink, component modifications for higher current output and new software

11 Introducing MultiWave 4048: Highlights Passively-Cooled: No fans Full rated power to 40C (104F) Dual AC inputs 90A charger Unprecedented surge and efficiency Lowest weight in its class Single phase 120Vac and 120/240Vac split phase models

12 Five models of MultiWave will be available Single phase 120V Single phase 120V with BOS Split phase 120/240 Split phase 120/240 with BOS 230V 50Hz

13 All models include the following standard features Built-in active display + LEDs LiveView web display (2) aux dry contact relays SD card slot 4-port Ethernet switch USB, RS-232/485 & Meterbus 5 year warranty

14 MultiWave includes a complete pre-wired balance of system package as an option Seamless integration into the base chassis of the inverter Includes all switch gear necessary for a completely NEC compliant installation Custom rotary bypass switch sized for dual inverter configuration

15 MultiWave electronics architecture expands possibilities well beyond legacy technology High frequency transformer reduces weight while enabling unprecedented power control Fully bi-directional; Power in = Power out (determined in W, not A) Optional BOSBlocks system internal DIN-rail mounted I/O expansion devices

16 MultiWave will integrate with Envision and is built to evolve with emerging market trends

17 High level service and support overview Morningstar support the best in the industry for 25 years Simplistic, compact design Only 2 boards Mostly non-serviceable Relay card is only field replaceable unit (FRU) Isolates most potential failure points onto easily replaced, single FRU 5 year base warranty / optional 10 year extended Support staff easily reachable in Maryland USA Easy replacement; ship same day boards/replacements Spares to be stocked at AEE and Morningstar distribution center

18 MultiWave supports the typical operating modes with enhancements and some new Off-grid Hybrid Backup Power/UPS Solar Priority Parallel Pass-through

19 Off-grid PV Only

20 Off-grid with Generator

21 Off-grid with PV and Generator OFF

22 Off-grid with PV and Generator ON

23 UPS grid generator OFF - Normal

24 UPS grid generator START

25 UPS grid generator ON

26 Pass Through Generator OFF

27 Pass Through Generator ON

28 Solar Priority with grid support

29 Q&A