The math on a bank of solar panels and a powerwall will almost never give you a return on investment, except maybe in the high prices of power in Cali.
portable solar array and large battery to charge up volt?
I rent a house and can not add solar panels or a home battery to the house. I do have a large and very sunny yard to utilize. Anyone looked in to hooking up a solar array to a storage battery and then using the battery to charge up the electric car (Volt and Bolt in my case) during the night? I drive about 6 miles a day and my wife will soon get a Bolt and be driving 12 miles per day. If we have to use the home's outlets sometimes, no big deal.
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Just place one of these on your voltshelf or dashIf you must have solar for the Volt -
get a small one to charge your smart phone
then you can get more than the 0.5 amps the USB outlet gives you.
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Small change Just to keep the number ( 6-8-12 amps available) at 120 volts but the included L1 devices only do pilot sig for 8-12 amps.
http://www.goalzero.com/solar-panels
If you want to charge all day and put it into a battery then add one of these.
http://www.goalzero.com/power-packs
But make no mistake, that .5A you are saving by not using the 12V battery isn't going to give you more than a few dozen feet of extra range if anything at all.
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