A sump pump battery backup system consists of a sump pump, a 12-volt marine battery and electrical and plumbing accessories. The system acts as a secondary, backup system for your primary sump ...

This two-stage system includes a 120-volt electric sump pump connected to a 12-volt backup pump that runs off a deep-cycle marine battery. During normal operation, the electric sump pump will pump ...

CR tested popular brands of sump pump backup systems to find the ones that will keep your basement dry in the worst weather ... These systems typically use a 12-volt deep-cycle marine ...

This two-stage system includes both a 120-volt electric pump and a 12-volt backup pump that runs off a deep-cycle marine battery. The pumps are connected and both placed in the sump pit.

The Consumer Reports sump pump backup system buying guide covers the types, ... For battery-powered units, each model is tested using a 12-volt deep-cycle AGM battery with a 75-amp-hour capacity.

They come in several forms. Although most emergency sump pumps can run on any 12-volt battery in a pinch, there are some that are better than others for the job.

Basementsaver recommends 12-volt, size 27 “deep cycle” marine batteries, which cost considerably more than the typical car battery at between $200 and $300.

When your primary pump—or the power—fails, these top-rated models are ready to step inIn our lab tests, we measured the flow rate and battery draw of 11 sump pump backup systems.By Jesse ...