Its always fun to enlighten one of those Tesla owners who thinks they are going to install a solar system at their house to charge their Tesla. A system large enough to recharge a Tesla actually costs as much as that Tesla. Most Tesla's have a 100Kw battery. Some of the emerging EV's have much larger batteries. Right now the average LIFEPO4 battery costs $0.39 per watt delivered to your door, but not installed. That's $39K for a 100Kw battery bank, or 20 x EG4-LL batteries from Signature Solar.. The amount of solar paneling needed to charge that bank is no less than 60 x 400 watt panels, or 24,000 watts of solar paneling - $16K. 24K of PV will charge a 100Kw battery bank in 5 hours. Why not 4 hours? Because the 400 watt panel rating is NOT what the panels produce in the wild. Expect 375 watts on a cool clear day, and less than that if its anything less than perfect outdoors. Factor line loss, inverter inefficiencies and PV angle and your 24k array might produce +/- 20K from 10am - 2pm. All of this PV requires a really large roof or two Sinclair ground mount racks - $12k. To manage 24k of PV the (arguable) best current option is to install two Sol-Ark 15k inverter/chargers - $16k. Copper wiring is astronomically expensive these days, and depending on how far the runs are for your DC conductors from the array to the inverters, you could easily add another $10K in wiring, conduit, disconnects, breakers, and miscellaneous electrical gadgets. Its prudent to pay someone who knows how to install all of this, and the installation costs are no less than $15K for a system this size.Any solar system for your house without batteries is half a system, your batteries must be compatible with your inverters; inverters go obsolete, I also have a 29 panel system for my house, I also have 2 enphase batteries with enphase inverters, it runs the entire house, leave out the water heater, clothes dryer, microwave and stove. This system with a nice generic generator on it would be a good thing, with the right software, u could charge your batteries for the solar system off your generator, u could also fry your system doing this, better know what your doing!...I don’t do this to mine....About affordability, my system will never pay for its self in my life time, it was $62,000, with a 25 year guarantee, batteries last about 15 to 20 years..if your looking for affordable do not go solar!..also an EMP blast will fry your inverters. I hope this information helps someone make a decision...if your a green nut? Then consider the lithium in these batteries, and disposing them in 20 years ! Lithium is very toxic, should probably never be mined!
Add it all up and 39+16+12+16+10+15= $108K. Sure, you might get a 30% rebate and end up with an actual cost of $70K, but this scenario is what it would actually take to charge ONE EV, only needing to charge it 35-50% daily and the rest goes to powering the home and its loads.
BTW - Sol-Ark inverters are designed like Swiss Army knives. The new 15K has 200 amp pass through and can control a whole home standby generator to recharge the battery bank when the weather sucks. We are waiting for their EMP hardened version of the 15k to hit the street. Right now we have the 12k EMP and its sufficient for our needs.