A sump pump only protects your basement while it has power, and storms often take the power out right when the water rises. A battery backup system fixes that by switching to a battery the moment the grid fails. The five systems below all turn battery power into pure sine wave AC power for your pump, and none of the listings include the battery, so you supply your own deep-cycle battery. They differ in output rating, charger speed, displays, outlets and extra safety features. Here is how they compare and who each one fits best.
| Product | Rated Output | Charger | Display | Best For |
|---|---|---|---|---|
| OLTEANP 1500W Sump Pump Battery Backup | 1500W (3000W peak) | 25A | LCD remote | Extra outlets and USB |
| MWXNE 2000W Sump Pump Battery Backup | 2000W | 20A | None listed | Ground-fault protection |
| SUNIVORA 2000W Sump Pump Battery Backup | 2000W | 20A | LED display | Multiple pumps |
| VIOPUMPO 2000W Sump Pump Backup System | 2000W | 25A | LCD remote | Fast charging with remote |
| Gsskny 1500W Sump Pump Battery Backup | 1500W (3000W peak) | 20A | LCD display | Simple soft-start unit |
Our Picks: Best home battery backup for sump pump reviews
OLTEANP 1500W: The Backup That Also Charges Your Phone
The OLTEANP is the only pick here that doubles as a small charging hub. Along with three AC outlets, it has a USB port and a Type-C port, so you can keep a phone charged during a blackout while the pump keeps running. It is rated for 1500W with a 3000W peak, which the maker says suits standard residential sump pumps but leaves less headroom than the 2000W models.
Its 25A charger is the strongest of the 1500W group, and it accepts LiFePO4, AGM, GEL and flooded deep-cycle batteries, so you are not locked into one battery type. A wired remote with an LCD shows battery voltage, load level and operating mode. The kit includes 31.5-inch battery cables and comes with 24 months of support. The battery is not included, so plan to buy one separately.
Pros:
- Three AC outlets plus USB and Type-C ports
- 25A charger that accepts LiFePO4, AGM, GEL and flooded batteries
- Remote LCD shows voltage, load level and mode
- 24 months of support
Cons:
- Battery is not included; 1500W gives less headroom than the 2000W models
Verdict: Choose the OLTEANP if you want extra outlets, USB charging and a longer support period, and a 1500W rating is enough for your pump.
MWXNE 2000W: Ground-Fault Protection and Fast Setup
The MWXNE stands out for its safety hardware. A circuit breaker cuts power to the circuit when a ground fault is detected, and a smart chip handles overload, short circuit, over-voltage, under-voltage, over-temperature, overcharge and reverse polarity. In a damp basement, that ground-fault layer is a meaningful extra that some other picks do not list.
It delivers up to 2000W and 18.5A, enough to support more than one pump, and it switches from the grid to the battery in under 10 milliseconds. Setup needs no rewiring: you connect the AC and DC cables and plug in, which the maker says takes under 10 minutes. The 20A charger drops to trickle charging once the battery is full. Unlike the OLTEANP, no USB or Type-C ports are listed, and the battery is sold separately.
Pros:
- Ground-fault circuit breaker plus a wide set of protections
- Grid-to-battery switchover in under 10 milliseconds
- Setup the maker puts at under 10 minutes
- 2000W output for more than one pump
Cons:
- No battery included, and no remote screen or USB ports are listed
Verdict: Choose the MWXNE if ground-fault protection and quick, no-rewiring setup matter most, and you want 2000W of output.
SUNIVORA 2000W: Three Outlets and a Quick-Charging 20A Charger
The SUNIVORA is the pick for a basement with more than one pump. Its 3 AC sockets can power 3 pumps at once, and it is built around 2000W of pure sine wave output at 20 amps. If you also run a sewage pump or a watchdog device, having that many outlets means you do not need a power strip.
Charging is its other strength. The 20A three-stage charger can fill a 100AH battery in about 5 hours, which the maker says is four times faster than a 5A charger. That matters when a second storm follows the first one. An LED display shows battery voltage and AC voltage, and a 3-pin plug keeps installation simple. The display is a basic readout, though, and the VIOPUMPO and OLTEANP give you a remote screen with more detail.
Pros:
- Three AC sockets for up to three pumps
- Fast 20A charging, about 5 hours for a 100AH battery
- LED display shows battery and AC voltage
Cons:
- The LED display is more basic than an LCD remote
- Battery is not part of the package
Verdict: Choose the SUNIVORA if you run several pumps or want the fastest-charging setup for a large battery.
VIOPUMPO 2000W: A 25A Charger and a Built-In Cooling System
The VIOPUMPO pairs a 25A charger with 2000W of pure sine wave output, which makes it the strongest charger among the larger models. Its LCD remote control shows voltage, power and battery charge status, so you can check the system without crouching next to the unit. It also has a built-in cooling system and an overload protector.
One caution: it works with deep-cycle batteries, including deep-cycle lithium and AGM, but not with non-deep-cycle batteries. Check what you have before you buy. Installation needs no extra wiring. You assemble the AC and DC cables, plug the pump into the AC socket, and use the side holes to lay it flat or mount it on a wall. The warranty is 12 months, shorter than the OLTEANP.
Pros:
- 25A charger on a 2000W unit
- LCD remote shows voltage, power and charge status
- Built-in cooling system and overload protector
- Flat or wall mounting with side holes
Cons:
- Does not work with non-deep-cycle batteries
- Warranty is 12 months, shorter than the OLTEANP
Verdict: Choose the VIOPUMPO if you want 2000W with a 25A charger and a remote display, and you already have a deep-cycle battery.
Gsskny 1500W: A Simple Plug-and-Play Option With Soft-Start
The Gsskny is the plainest option, and that is its appeal. It is rated for 1500W with a 3000W peak, and it adds soft-start technology within a 7-layer protection setup that also includes reverse polarity and high-temperature protection. A built-in circuit breaker backs that up. If your pump draws a big surge when it kicks on, soft-start is a useful feature to see.
An HD LCD screen shows voltage, power output, battery level and operating status, and the 3-pin plug avoids wiring mistakes. The charger tops out at 20A. One practical detail is that the included battery cables are only 1.75 feet long, so the battery has to sit close to the inverter. That is fine for a tidy shelf setup, but measure your space first.
Pros:
- Soft-start technology and a 7-layer protection setup
- Clear LCD with voltage, power, battery level and status
- Plug-and-play 3-pin design
- 3000W peak rating
Cons:
- Short 1.75-foot battery cables limit placement
- Charger is 20A, below the 25A on two other picks
Verdict: Choose the Gsskny if you want a straightforward 1500W unit with soft-start and a clear LCD, and your battery can sit close by.
How to Choose a Battery Backup for Your Sump Pump
Match the Output to Your Pump
Start with the pump you already own. The 1500W units here also list a 3000W peak rating, which is the figure that matters for the short surge a pump motor draws at startup. The 2000W units add room if you run more than one pump or a larger one. Check your pump’s label for its running and starting power, then pick an inverter that clears both numbers with some margin. Buying more output than you need costs extra, but buying too little defeats the purpose.
Pure Sine Wave Output
All five systems here produce pure sine wave power, which is the cleanest kind. Motors such as the one in a sump pump run smoothly on it and are protected from the rough power that cheaper inverters can produce. If you ever compare other models, treat pure sine wave as a requirement rather than a bonus.
Battery Type and Charger Speed
None of these listings include a battery, so you will buy a deep-cycle battery separately and match its voltage to the inverter. The OLTEANP, MWXNE, SUNIVORA and VIOPUMPO describe support for several deep-cycle types, such as LiFePO4 and AGM, but the VIOPUMPO specifically does not work with non-deep-cycle batteries. A faster charger, such as the 25A units, brings the battery back sooner after an outage. That helps when storms arrive back to back. Also look for a charger that switches to trickle charging when the battery is full, so it stays ready without overcharging.
Safety Protections
Your backup will sit in a basement that may be damp, so safety features matter. Look for overload, short circuit, overcharge, low voltage, over-temperature and reverse polarity protection. A built-in circuit breaker adds another layer, and the MWXNE goes further with ground-fault protection. These features guard both your equipment and your home.
Displays and Monitoring
A display lets you check battery voltage and load without guessing. The OLTEANP and VIOPUMPO use a remote LCD, the Gsskny has an LCD on the unit, and the SUNIVORA has an LED display. A remote is handy when the unit is mounted in a hard-to-reach spot. Whatever you choose, check it now and then so a weak battery does not surprise you during a storm.
Installation and Placement
Each system here connects by attaching the DC battery cables and plugging the pump into the unit’s AC outlet. Several can sit flat or mount on a wall. Pay attention to cable length, because the Gsskny’s short battery cables mean the battery must sit right next to it. Plan where the battery, inverter and pump will go before you order, and keep them somewhere dry and above the floor.
Electrical and Battery Safety
Plug only your sump pump and similar loads into the backup unit’s outlets. Never connect the unit’s output to a wall outlet or your home’s wiring with a double-ended cord, because that can backfeed power onto the utility lines and endanger line workers. If you want the output hardwired to a circuit rather than plugged in, have a licensed electrician do it. The OLTEANP, for example, mentions an AC hardwire output, and that connection is not a do-it-yourself job. Batteries, especially flooded types, give off gas while charging, so keep the battery in a well-ventilated spot and away from sparks. A gasoline or propane generator should only ever run outdoors, well away from doors and windows, and never in a basement or garage. Following the maker’s manual for cable size and breaker use is part of a safe setup.
Frequently Asked Questions
Do these systems include a battery?
No. Each system listed here needs a 12V deep-cycle battery that you buy separately. The battery is what actually powers your pump during an outage, so choose one with enough capacity for your needs.
What type of battery should I use?
The OLTEANP accepts LiFePO4, AGM, GEL and flooded deep-cycle batteries. The VIOPUMPO works with deep-cycle lithium, AGM and other deep-cycle types, but not non-deep-cycle batteries. Check the details for the model you choose before buying a battery.
How fast do these switch to battery power?
The MWXNE lists a switchover time of under 10 milliseconds. The others describe automatic or fast switching without giving a number, so the MWXNE is the one with a stated figure.
Can I run more than one pump?
The SUNIVORA has 3 AC sockets and can power 3 pumps at once, and the MWXNE is listed as supporting multiple pumps. The 1500W models are better suited to a single pump.
How long does it take to charge the battery?
It depends on the charger and the battery. The SUNIVORA says its 20A charger can fill a 100AH battery in about 5 hours. The VIOPUMPO and OLTEANP have 25A chargers, so they are built for fast recharging as well.
Is installation difficult?
The designs are meant to be simple. Several are described as needing no extra wiring: you connect the AC and DC cables and plug the pump into the AC socket. The MWXNE maker puts setup at under 10 minutes. Plug the pump in directly and never feed the unit’s output into a wall outlet, which can backfeed the utility lines. If you want a hardwired connection or are unsure about the battery connection, hire a qualified electrician.
Can I mount the unit on a wall?
Yes. The OLTEANP, MWXNE and VIOPUMPO are listed as supporting wall mounting or flat placement, and the SUNIVORA’s maker doesn’t say. Wall mounting can keep a unit off a damp floor.
Final Recommendation
If you want the best overall balance, the VIOPUMPO and the MWXNE are strong choices at 2000W: the VIOPUMPO for its 25A charger and remote display, and the MWXNE for its ground-fault protection and fast switchover. The SUNIVORA is the better fit for several pumps, and the OLTEANP suits you if you want USB charging and longer support on a 1500W unit. The Gsskny is a good simple choice if your battery can sit close by. Whichever you pick, buy a quality deep-cycle battery to go with it, and make sure the output covers your pump’s starting surge.