Sam Gorman

Estimate battery internal resistance from open and loaded voltage, then check sag, heat, efficiency, and a planned load.

Find charger amps, charge time, common charger size, and C-rate using battery Ah, target charge, efficiency, and safe limits.

Estimate home battery runtime for outage loads and optionally compare running and startup demand with the system power limit.

Estimate usable kWh, battery units, runtime, and optional peak power needs for a home outage backup plan.

Estimate solar charge time from battery Wh, charge level, panel watts, station input limit, sun hours, and running load.

Size a portable power station in Wh and W from your device list, with optional model and solar checks.

Estimate power station run time or needed Wh with efficiency, reserve, idle draw, and outlet watt limit checks.

Estimate RV daily Wh, Ah/day, battery runtime, solar balance, break-even solar watts, and same-time running load.

Estimate RV AC generator size by running watts, starting watts, other loads, soft start, buffer, and camping elevation.

Estimate RV battery charge time from bank capacity, battery type, starting charge, target charge, charger amps, and RV power use.