I get FranklinWH (and Enphase, Tesla, Canadian Solar EP Cube, Sigenstor, etc) doing integrated battery and inverters {and the otherwise unjustified price premium that comes with proprietary connections}. HOWEVER, batteries and inverters have much different MTBF (mean time between failures). Granted, in the short run, the vendors can replace selected components on a warranty basis as needed. But EnPhase has shown challenges with cross-generational compatibility, and assuming that parts will be available in 10-15 years for all these vendors seems more fanciful/wishful thinking than practical. And one gets forced into T-Shirt sizing purchase options when Inverter and battery capacity design decisions are NOT that closely linked.
A modular design (separate inverter and battery boxes) would seem to have a much better purchase alignment with site requirements (spec/purchase inverter and battery separately, as needed) and lifecycle outcome (I mock those that prioritize aesthetics over function and value). And would more easily enable simple DC battery only expansion options, when Inverter already sized properly, and simply more kWh storage capacity is desired.
I get simplicity of install with single box, BUT that could be handled easily enough such that it would have a negligible install impact (ex. industry standardized mount interface on top of Battery #1 for inverter, if desired... note I said mount, not electrical and communication interfaces, which would be nice if standardized, but doesn't need to be at this point.)
And this would enable FranklinWH to offer solution for those that desire to maximize in-garage install (40kWh code limit) by offering a DC-battery expansion pack (in the 10kWh or 2x5kWh or whatever is required when combined with 2 aPower 2's)
Anyway - food for thought on improving customer long-term experience
I really like FranklinWH's open architecture approach, and I have EnPhase IQs (no battery). So, FranklinWH checks so many [requirement] boxes for me.
- But the battery/inverter design seems short-sighted. Am I missing something?