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@DIYrich Thanks for the feedback. Was also considering https://signaturesolar.com/eg4-6000xp-off-grid-inverter-split-phase/. Will talked very highly about it, but it is almost 2x the cost (although may be very beneficial in the long run). Also didn't consider the minimum solar voltage...

I'm considering building a battery backup system that can eventually be expanded in the future. Phase 1: I'm considering getting a EG4 3kW off-Grid inverter and a 48v battery. Initially, my thought is to use this as a UPS with my chest freezer & NAS in the garage, having it plugged into a 15...