zanary
Active Member
Where did you find that policy? I've been asking Tesla, and this is the closest I've gotten to an answer:
"When Powerwalls are installed with PV systems, the PV system is its charging source, and will not be set up to pull and store energy from the grid. We can also reach out to your designer for a more detailed explanation if you would like."
Tesla can only install a small solar system, but it takes two powerwalls to really provide backup power. It seems like most of the value would come from doing peak shaving, or demand shifting along with the solar. Thanks for the info!
I can't find the actual bill for the ITC (Investment Tax Credit), but here is a 3rd party who has summarized that if you take it because you have both PV and Battery, that the battery needs to be charged from renewal energy system (which in our case is PV only), and it also mention that the ITC vests over 5 years, so maybe that's the 5 year before the rule no longer applies as your ITC credit is officially over.
URL = https://www.nrel.gov/docs/fy18osti/70384.pdf