PLUMBING
How Much Does Sump Pump Battery Backup Cost?
Estimate sump pump battery backup purchase and installation cost — with the free calculator.
A battery backup keeps your sump pump running during power outages — exactly when storms flood basements. The price depends on the system, battery capacity and labor. This guide covers the installed cost and a calculator.
THE SHORT ANSWER
The short answer
A sump pump battery backup costs $600–$2,000+ installed. The system runs $150–$800; professional installation is $600–$1,200. It's the best insurance against basement flooding during storm power outages.
What it costs
A battery backup system runs $600-$2,000+ installed. The system alone costs $150-$800 depending on battery capacity and pump quality. Professional installation runs $600-$1,200 including plumbing, wiring and float setup.
- System (battery + pump): $150–$800
- Professional installation: $600–$1,200
- Total installed: $600–$2,000+
When you need it
If your basement or crawl space has a primary sump pump, a backup matters. During a storm, power often goes out right when the pump is needed most. Battery backups run for 5-10 hours or more depending on load.
Battery vs water-powered
Battery backups work without municipal pressure and are more reliable. Water-powered backups use water pressure but need strong flow and can drain lots of water. Most pros recommend battery for typical homes.
Try the calculator with your system
Enter the number of backup systems, system price and installation per system to see the total.