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Sump Pump Battery Backup Guide
What it is, how long it runs, and whether your basement needs one.
Quick answer
A sump pump battery backup is a second pump powered by a dedicated battery that takes over when the power goes out — which, during a storm, is exactly when your primary pump is needed and has nothing to run on. For most finished basements in Littleton, it's the single most important upgrade you can make.
Here's how backups work, what to expect, and how to decide.
- Local Littleton Service
- Professional Installation
- Clear, Upfront Estimates
- Battery Backup Options
- Careful, Clean Workmanship
- Emergency Help Available
How a battery backup works
The backup pump sits in the same pit as your primary, with its own battery, charger, and controller. When household power fails — or the primary can't keep up — the controller switches to the battery-powered backup automatically and sounds a high-water alarm. The charger keeps the battery topped off so it's ready.
How long does it run?
- Runtime depends on how often the pump cycles and battery capacity
- A healthy deep-cycle battery typically covers a normal outage
- Long outages or heavy water may need a larger or second battery
- Batteries last 3–5 years and need scheduled replacement
Do you need one?
If your basement is finished, you have a high water table, or you've ever lost power during a storm — yes. The most common basement flood is a power outage during heavy rain with no backup in place. A water-powered backup is an alternative for homes on city water that never want a battery to manage.
When to call a pro
We install and integrate battery and water-powered backups with new and existing systems. Call (207) 419-2600.
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What Homeowners Say
A few illustrative examples of the basement-water problems we help solve across the Littleton area.
Our sump pump quit during a spring storm and the basement started taking on water. They walked us through what to do, got out quickly, and replaced the pump with a backup. Dry ever since.
We were finishing our basement and wanted to do it right. They sized a system for our clay soil, added a battery backup, and ran the discharge well away from the house. Clear estimate, clean work.
The discharge line kept freezing every winter. They re-routed it below the frost line and the problem is gone. Friendly, local, and they explained everything.
Our older home always smelled musty downstairs. They found water wicking up where the wall meets the floor, put in a proper pit and pump, and the smell is finally gone.
I got three quotes, and theirs was the only one that actually explained what I was paying for. No pressure, tidy work, and they tested everything before they left.
The pump was cycling every couple of minutes and driving us crazy. Turned out the pit was undersized. They fixed it right and showed me how to test it myself.
Reflective of the homeowners we help across the Littleton area.
Frequently Asked Questions
Protect Your Basement Before the Next Storm
Get professional sump pump help from a local Littleton specialist. Clear, upfront estimates and careful, clean workmanship.
Available by appointment. Emergency sump pump help available.