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When heavy rains hit and the power goes out, your sump pump can fail in minutes, leaving your basement flooded. You need a reliable battery backup system that kicks in instantly and keeps water moving until power returns. This guide reviews the top sump pump battery backup systems so you can pick the right one for your home, pump size, and budget without guesswork.
Top Picks
- Best Overall: 1733 Battery Backup System for Sump, Sewage, and Ejector Pumps
- Best Value: VEVOR 2000W Sump Pump Battery Backup System
- Best Performance: 1622PS – Sump Pump Backup System
- Best for Large Capacity: Zoeller 585-0005 Aquanot II Battery Backup Pedestal Sump Pump System
- Best for Quiet Operation: PumpSpy 2000W Sump Pump Battery Backup System
How We Selected Our Top Picks
When selecting a sump pump with battery backup, consider factors such as reliability, ease of installation, battery life, and customer reviews. You want a system that not only performs well but also provides you with the assurance that it will function when needed most. Look for features like automatic battery recharging, high flow rates, and compatibility with your existing sump pump.
1733 Battery Backup System for Sump, Sewage, and Ejector Pumps
The SEC America 1733 Battery Backup System delivers 1800W of pure sine wave power and handles up to 15A, so it keeps your existing sump, sewage, or ejector pump running at full capacity during outages. It automatically transfers to your 12V deep cycle battery in milliseconds and recharges when power returns, giving you days of runtime depending on your battery size and pump cycle. You get silent, clean operation with no extra plumbing required.
Unlike most inverters that only support standard sump pumps, the 1733 also works with sewage and ejector pumps, making it ideal for homes with more complex drainage. The compact aluminum housing mounts easily on the wall and leaves your sump pit completely free.
Pick this if: you have a sewage or ejector pump and want one backup unit that handles multiple pump types without any modifications.
What People Say
Users rave about the 1733’s ease of installation and its ability to maintain pump performance during power outages. Many appreciate the flexibility it offers in terms of compatibility with different pumps, making it a versatile choice for homeowners.
- I’m very happy with the 1733 backup system. It was easy to hook up to the battery and to the Pro Series S3033 sump pump I’m using. It worked seamlessly when I tested the system with and without the house power and just the battery. There are lots of opinions on the best solution for a sump backup. I like the 1733 since I can plug any 120v pump into it. My concern with a 12V DC lower capacity battery-operated backup pump is that it might not keep up during a power failure. With the 1733 I’ll have the full 1/3 horsepower for at least a couple days with it running every 15 minutes or so.– pc
Key Benefits
- 1800W capacity supporting up to 15A pumps (sump, sewage, and ejector)
- Automatic instant power transfer and battery recharging
- Easy wall-mount installation that leaves sump pit clear
- Silent, clean operation with full pump horsepower preserved
When to Use This Backup System
This system is especially useful during heavy storms or when you know there might be a risk of flooding. It ensures that your sump pump continues to operate, protecting your home from water damage even when the power is out.
VEVOR 2000W Sump Pump Battery Backup System
1622PS – Sump Pump Backup System
The SEC America 1622PS Pump Sentry delivers a rock-solid 1800W and automatically switches to your 12V deep cycle marine battery the moment power fails. It supports up to 3/4 HP sump pumps with a high surge capacity, so your pump runs at full strength even during startup. The compact aluminum housing installs in minutes with no pit modifications and includes clear indicators for power, battery charge, and battery replacement.
You get years of dependable service with this proven unit that has protected countless basements. The system recharges automatically when power returns and maintains your battery safely.
It stands out from newer generic inverters by offering a rugged, purpose-built design that has been a homeowner favorite for years.
Pick this if: you want a proven, no-frills 1800W inverter that works with most 3/4 HP sump pumps and installs in under 10 minutes.
What People Say
Users love the 1622PS for its straightforward installation and dependable operation during storms. Many have shared how it saved their basements from flooding, providing a sense of security when the power goes out.
- Less than a week after purchasing the Pump Sentry, we lost power during a storm. The system worked as advertised, keeping our 3/4 horse pump running for 7.5 hours without electricity. It was easy to install, and the battery charged quickly. Just remember to get a good quality deep cycle marine battery for optimal performance.– BillyJet
Key Benefits
- 1800W capacity with support for up to 3/4 HP pumps
- Automatic battery switchover and recharging
- Compact, durable aluminum housing
- Clear power and battery status indicators
When to Use This Backup System
This backup system is especially useful during heavy rainstorms or when you know a power outage is likely. It ensures that your sump pump continues to function, protecting your home from potential water damage even when the lights go out.
Zoeller 585-0005 Aquanot II Battery Backup Pedestal Sump Pump System
The Zoeller 585-0005 Aquanot II is a complete pedestal backup pump system that includes its own 12V DC pump capable of moving up to 49 GPM at 5 feet of head. It comes with an electronic 28A charger, microprocessor control, LED status indicators, and a 12V pump alarm so you know exactly what is happening. The non-corrosive design and positive-contact float switch ensure reliable operation even if your primary pump fails completely.
You simply drop the pedestal pump into your sump pit alongside the primary unit and connect a deep cycle battery. This setup gives you true redundancy because it has its own pump, not just backup power.
Where most options only supply power to your existing pump, the Aquanot II adds a full second pump for maximum protection.
Pick this if: your primary pump is aging or you want a complete backup pump plus power system in one package.
What People Say
Users appreciate the Zoeller Aquanot II for its dependable performance and ease of installation. Many have shared experiences of how it effectively kept their basements dry during power outages, providing a sense of security when storms hit.
- This has replaced my original Zoeller unit due to the charging unit going bad after over 10 years of service. The pump itself is still in great working order. It’s a high-quality product that performs as expected, and I appreciate the reliability it offers.– B Worden
Key Benefits
- Includes 12V DC backup pump (~49 GPM flow)
- 28A automatic electronic charger with microprocessor control
- Built-in 12V pump alarm and LED indicators
- Heavy-duty non-corrosive pedestal design
When to Use This Pump System
This sump pump system is particularly useful during heavy rainstorms or when you anticipate a power outage. It ensures that your primary pump continues to function, protecting your home from potential flooding even when the electricity goes out.
PumpSpy 2000W Sump Pump Battery Backup System
The PumpSpy 2000W Sump Pump Battery Backup System outputs a clean pure sine wave at 2000W (16.6A running, 33A surge) and can run one or two primary sump pumps at the same time. It features intelligent cooling, overcharge protection with automatic trickle charging, two grounded AC outlets, and a USB port. You simply connect your 12V deep cycle battery and plug your pumps in — the system handles everything else automatically.
Homeowners praise the quiet operation and the smart features that extend battery life. The compact design installs quickly on the wall near your electrical panel.
Its intelligent cooling and dual-outlet design set it apart from basic inverters, making it especially reliable for longer outages.
Pick this if: you want quiet, smart monitoring and the ability to back up two sump pumps from one unit.
What People Say
Users rave about the PumpSpy 2000W for its reliability and ease of installation. Many have shared how it kept their basements dry during power outages, providing peace of mind when the weather turns nasty.
- I’m very pleased with both the pump spy back up/inverter unit and the pump by deep cycle 12 V battery. Installation was a breeze and my system was up and running in no time. Slightly disappointed that the RJ-45 port was not used, but all in all these two pumps by products seem to be top-of-the-line and I look forward to them lasting for a long, long time.– RBI
Key Benefits
- 2000W pure sine wave with 16.6A running / 33A surge capacity
- Intelligent cooling and overcharge protection with trickle charge
- Supports two pumps simultaneously plus USB port
- Fast, simple installation with built-in charger
When to Use This Backup System
This backup system is especially useful during heavy rainstorms or when you know a power outage is likely. It ensures that your sump pump continues to operate, protecting your home from flooding even when the electricity goes out.
Frequently Asked Questions
How do I choose the right battery size for these backup systems?
Most of these systems work with a 12V deep cycle marine battery rated 75–200 amp-hours. Larger batteries give you longer runtime during extended outages; for example, a 100Ah battery typically powers a 1/3 HP pump for 8–12 hours of intermittent use with the 1733 or PumpSpy units. Always match the battery to your pump’s draw and expected outage length.
What is the difference between an inverter-style backup and a full pedestal pump system like the Zoeller Aquanot II?
Inverter systems (1733, 2000W, 1622PS, PumpSpy) supply AC power to your existing pump, while the Zoeller Aquanot II includes its own 12V DC backup pump that drops directly into the pit. The pedestal system gives you complete redundancy if your primary pump fails, but requires more pit space. Inverter units are simpler and cheaper if your main pump is reliable.
Can these systems run two sump pumps at the same time?
Yes — the 2000W VEVOR-style unit and the PumpSpy 2000W are specifically designed to power two pumps simultaneously through dual outlets as long as the combined draw stays under 16–18A. The 1733 and 1622PS are best for single-pump setups. Always check your total amp load before installation.
Wrapping Up
If protecting against long outages with a single reliable inverter is your top priority, start with the SEC America 1733 or 1622PS. For multi-pump homes or the clearest monitoring, the 2000W systems deliver strong value. And if you want a complete backup pump plus power in one package, the Zoeller Aquanot II covers the basics without overspending. Pick the model that matches your main use case and install it before your next big storm.
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