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Last Revised: 6/9/25
What happens when your sump pump loses power during a storm? Could your basement flood even if your system “seems” to be working beforehand?
When protecting your home from flooding, your sump pump is your first line of defense. But when the power goes out, a battery backup sump pump can save the day.
At Mattioni, we’ve spent over 75 years helping homeowners protect their homes from water damage with expert sump pump systems and services. One of the smartest upgrades we recommend is a battery backup sump pump – a system designed to keep your basement dry even when the power goes out.
In this article, you’ll discover the top 10 questions (plus a couple of bonus ones) homeowners ask about battery backup sump pumps, including how they work, installation best practices, and maintenance tips.
Top FAQ About Battery Backup Sump Pumps
1. Do I really need a battery backup for my sump pump?
If your basement relies on a sump pump to stay dry, then yes – a battery backup is a smart investment. Power outages often happen during heavy storms, which is exactly when your sump pump needs to be working hardest. A battery backup keeps things running even when the lights go dark.
2. How Long Will A Sump Pump Run On a Battery Backup?
It depends on the system and the size of the battery. Most backup pumps can run anywhere from 5 to 24 hours continuously – or longer if the pump cycles on and off. In terms of gallons, many systems can handle several thousand gallons of water before the battery drains.
3. Can I Install A Battery Backup Sump Pump Myself?
If you’re handy with plumbing and electrical work, you can install one yourself. But for most homeowners, professional installation ensures the system is connected properly, tested thoroughly, and ready to run when it matters most.
4. Will The Battery Backup Turn On Automatically If The Power Goes Out?
Yes – most systems automatically detect power loss and switch to battery mode. You don’t need to flip a switch or be home for it to work. That’s kind of the whole point!
5. Are There Any Other Types Of Backup Systems Besides Battery?
Yes! Battery backups are the most common, but they’re not the only option:
- Water-powered backup pumps use your home’s municipal water pressure to move water out of the sump pit – no electricity or battery needed. However, they’re only an option if you’re on public city water, and they tend to move water more slowly.
- Generator-powered systems supply power to your main sump pump (and possibly your whole home) during an outage. While effective, generators are more expensive and require fuel, maintenance, and sometimes manual startup.
Each type has its pros and cons. Battery backups tend to offer the best balance of performance, cost, and convenience for most homeowners.
6. How Much Does A Battery Backup Sump Pump System Cost?
Costs vary based on system quality and installation needs:
- A basic DIY system might run: $600 – $1,200
- Professionally installed systems at Mattioni cost: $1,500 – $2,100
Keep in mind, a flooded basement costs far more than a properly installed, reliable backup system (not to mention the stress of cleanup).
7. How Often Do I Need to Replace The Battery In My Backup System?
On average, every 3 to 5 years. We recommend testing your system at least once a year and replacing the battery proactively rather than waiting until it fails.
8. What Happens If The Main Pump Fails – Will The Backup Take Over?
If your system includes a secondary pump powered by the battery, then yes – it can kick in even if your primary pump fails (not just when the power goes out). Just make sure your system is designed to monitor both power and pump performance.
9. How Do I Know If My Battery Backup Is Working?
Most systems have built-in alarms or indicator lights. You can also test it manually by unplugging your main pump and pouring water into the sump pit. If the backup kicks on, you’re good to go. If not – call a professional plumber.
10. Can The Backup Pump Handle As Much Water As The Main Pump?
Not always. Backup pumps are usually smaller and meant to buy you time until power is restored or repairs can be made. That said, high-capacity systems are available if your home requires extra pumping power.
11. What Should I Do If The Battery Backup Alarm Won’t Stop Beeping?
Check the display or instruction manual – alarms usually indicate low battery, a charging issue, or a pump malfunction. If the alarm doesn’t reset after addressing the issue, reach out to a plumber to inspect the system.
12. What Kind Of Maintenance Does A Battery Backup System Need?
Very little – just make sure to:
- Test the system every 6-12 months
- Keep battery terminals clean
- Replace the battery every few years
Some systems also have smart controllers that alert you when it’s time for service or replacement.
Still Have Questions?
Whether you’re figuring out if a battery backup is worth it, comparing options, or just wondering if your current system will hold up during the next big storm, you’re not alone.
Many homeowners don’t think about sump pump backups until it’s too late. But a little planning now can save you a lot of money – and a lot of stress – down the road.
At Mattioni, we’ve helped families protect their homes with the right backup systems for their needs, budget, and sump pump setup. We’re happy to walk you through your options, check your current system, or install a new backup pump that gives you total peace of mind.
- Schedule a visit today and stay one step ahead of the storm
- Or talk to our team for honest answers and zero-pressure advice – (610) 400-8510
Don’t wait for a flooded basement to secure protection – give yourself peace of mind today.
