Zaron Energy — Whole-Home Tool
Build Your Whole Backup Plan.
Combine the appliances that matter during an outage. Set each load's real watts, how long it must run, and any startup requirement. The calculator keeps energy capacity and inverter output separate.
One calculator. Every essential load.
Start from the Appliance Database, import a configured appliance automatically, or build the plan here from scratch.
Refrigeration, internet, pumps, HVAC, office, cooking and more.
Use actual operating time during the outage, not necessarily the full outage duration.
Battery kWh and maximum simultaneous / startup demand are shown separately.
Build Your Essential-Load List
Why this calculator is different
It Separates Energy From Power.
Many bad backup estimates mix watt-hours, running watts and motor startup into one number. They answer different questions.
How Long?
Watt-hours and kilowatt-hours determine how much energy is stored for the outage.
Can It Run?
Continuous AC output must support the loads that are operating at the same time.
Can It Start?
Compressors and motors may require short-duration startup capability above normal running power.
A Huge Battery Can Still Fail a Motor Load.
If the inverter cannot supply the required voltage or startup power, stored energy does not help. Zaron keeps those constraints visible instead of hiding them behind a single “battery size” result.
Methodology
Transparent Math. Editable Inputs.
Go deeper
Refine Each Load Before You Buy.
The central calculator is the map. The Appliance Database pages are where each load gets its own model-specific treatment.