this post was submitted on 19 Dec 2023
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Electric vehicles use a huge amount of power that many solar systems may not be able to accommodate, in addition to the regular usage load of the house. Keep in mind that the electrification dream is to also run HVAC and hot water off of electricity too. Also, in terms of charging your car, you’ll usually be at home charging overnight when the sun isn’t out. Sure, you can install a battery to charge from, but the capacity of these power walls is puny compared to the needs of an electric car. Also, you may want to use some of it for your actual house.
Not saying we shouldn’t try at home solar or that it won’t work for some folks, but it’s not a silver bullet. A lot of people will still be drawing from the grid, even with solar and back up batteries.
Fast-charging an EV for an hour would use the same amount of electricity a home would likely use in a day.