Build the right backup system.
Select the loads you want to protect, and see estimated power, daily energy use, battery sizing with a fixed 20% reserve, and solar contribution.
What are you planning for?
This changes the sizing assumptions and recommendation logic.
Emergency home backup
Keep critical or whole-home loads powered through outages.
Daily solar and bill savings
Store daytime solar and use it during peak-rate hours.
Tell us what needs power
Select the appliances you want to back up. The calculator uses realistic default wattage and daily-use assumptions; advanced values can still be adjusted.
Select appliances and circuits
Tap each item you want backed up. A checkmark means it is included.See your results
Your calculated power, energy, battery, solar, and extended-outage results based on the selected loads.
EP6K stacking adds both inverter power and battery capacity: each unit contributes 5.76 kW and 7.68 kWh, up to five units.
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Calculated from the selected loads and usage assumptions.
| Battery reserve | — |
| Total connected running watts | — |
| Existing solar contribution | None |
Planning estimate only. Existing-solar runtime assumes 5 equivalent peak-sun-hours and approximately 80% net solar delivery in fair conditions. Solar does not produce evenly throughout the day. Default daily consumption uses representative appliance ratings and equivalent hours of use; actual usage varies by model, household behavior, climate, temperature, battery state of charge, appliance cycling, power factor, startup surge, wiring, firmware settings, and installation. A/C soft-start values are planning assumptions and must be verified against the actual compressor LRA and installed soft-start performance. HVAC, pumps, dryers, ranges, water heaters, and other 240V or motor loads should be verified by a qualified installer. Product availability and final configurations may vary.