Solar Gear Spot

Sump pump backup

Estimate backup power for a sump pump.

Enter pump running watts, minutes per hour, outage length, and surge to estimate a battery class before deeper backup planning.

Quick result Run estimate

Pump backup is surge-sensitive and should be sized with caution.

Inputs

Planning assumptions

Use this as a planning estimate

Small solar and backup-power estimates depend on real device draw, temperature, battery age, sun, shade, and product limits. Use the result to narrow a shopping range, then verify exact specs before buying.

Planning notes

What this calculator is checking

Surge

Pump motors can spike hard

A battery may have enough watt-hours but still fail to start the pump.

Risk

Water damage changes the standard

For critical basement protection, use this only as an early sizing estimate.

Related

Solar recharge time calculator

Check whether a panel can refill the battery within your usable sun window.

Open calculator