Good points all round from @OffGridJack, @RussMitchell75 and @StormyDrifter. One thing nobody's mentioned yet — UPS batteries are designed to float at full charge for months then discharge rapidly...
@TelHall great setup! I've got something similar running and cracked this a while back. The missing piece for me was pulling grid data in via a Shelly EM clamped onto the incoming supply — it...
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