The Wayne ESP25 is the most popular battery backup sump pump system in the U.S. for good reason: it installs in under an hour, works with any existing primary pump, and provides 9,700 gallons of protection per charge — enough to handle a typical 24-hour power outage during a major storm. The 12V DC pump activates automatically when power fails or when your primary pump is overwhelmed, then shuts off and recharges when primary power returns. An alarm system alerts you to low battery, high water, or AC power failure. The ESP25 uses a standard group 24 marine battery (sold separately) that you can replace at any auto parts store. If you own a home with a basement, this system is the single highest-ROI flood protection purchase available.

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