Though I can really offer no advice, I am thinking about doing just about the same thing you are. It had been suggested to me to use the new Tesla batteries but I haven't gotten around to looking into them yet.
I'll be following this closely. Thanks you posting!
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שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד
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