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by singingfish 4180 days ago
I live in australia and I have 4kwh of solar panels on my unoccluded WNW facing roof. My electricity grid connection charge is around $300 AUD per year (around USD 250 per year at current rates - which is about the same as my annual electricity bill since I currently feed into the grid at the wholesale rate). Given a 10 year payback time, how long will it take until a battery array with say two days headroom and a small generator is cost effective for me? Say I'm prepared to pay double that in order to mitigate market risk?