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If I want to do a whole house battery backup (diy 48V, at least 15KW instantaneous, 1000-2000Ah ) with grid (input only) and batteries (input and output), what would I need to do it? I have 150A service to a panel currently. 1) Better to run a new service line or a line tap or what from grid...

Hi all, I've been looking at a lot of different whole house large battery backup options. The turnkey solutions are way too expensive (~$1000/KWh), so I'm looking at 48V battery banks connected in parallel (16sXp) to provide the desired current. A large system would come in around the...