This is currently posted on the PW FAQ: Can Powerwall charge my Tesla vehicle or an EV? Yes, Powerwall can provide stored solar energy to your EV through your home electrical panel. However, there is no direct connection between Powerwall and the EV wall connector. Powerwall FAQs Color me very confused. We're coordinating for two (or possibly more) PW's for a PV install on a new home in Phoenix, all with Tesla Energy/SolarCity. SolarCity failed to submit the application on time (GRRRR!), so now we've lost out on being grandfathered into the barely decent APS "old" net metering, and now we'll be forced to use the new, "garbage net metering" with absurdly low buy back rates. Hence, our new need to capture our own power. With both a 90D and a P100D, we would like to keep as much of our "home power" usable as DC because my understanding is that one loses about 10% in the conversion from DC to AC (and another 10% on the way back), and since our new home should be pretty efficient, our greatest power demand will likely be the Teslas. So here's what Tesla/SolarCity is having every Tesla owner do with their PW? 1. Generate solar energy: DC. 2. Store solar energy in PW: Always DC. 3. Convert PW energy into AC for generic home use: DC to AC, lose ~10%? 4. Charge Tesla car batteries (batteries are always DC): Convert AC back to DC, lose another ~10%? Especially considering that many PW's are installed in the garage, why is there no "Bypass AC Inverter/DC Out" option on a Powerwall?!? Why is so much power being wasting and for no good reason? Obviously, Tesla is filled with smart people doing smart things; what am I missing here?