Editorial, best of
The best inverters for whole-home backup (2026)
Curated by The Off Grid Outpost editorial, last verified May 5, 2026
Hybrid inverters sized to back up an entire average-size US home, 12kW continuous and up, without needing a critical-loads subpanel.
How we picked
Whole-home backup means you can keep AC, heat pump, well pump, and 240V appliances running on battery. That requires 12kW+ continuous, real surge headroom for motor starts, and split-phase 240V output. We screen for all three.
2 picks
Sol-Ark
15K-2P
15kW · 3 MPPT
15 kW split-phase hybrid inverter accepting up to 19.5 kW PV across 3 MPPTs, 97.5% peak efficiency.
EG4
18kPV Hybrid Inverter
12kW · 3 MPPT
12 kW split-phase hybrid inverter accepting up to 18 kW PV across 3 MPPTs, 97.5% peak efficiency.
Methodology
Selections are filtered programmatically against the Off Grid Outpost catalog using verified manufacturer-datasheet specs. Editorial review verifies each list quarterly. We do not accept payment for placement, ranking reflects fit-for-purpose, not affiliate margin. See our affiliate disclosure for full details.