A single severe storm dropped 4 inches of rain on my neighborhood last spring, and within 90 minutes the power was out. My primary sump pump quit running, and water started creeping across the basement floor. That night taught me why battery backups for sump pumps are not optional equipment for anyone with a finished basement or stored valuables below grade.
After that experience, I spent three months researching, installing, and testing six of the most popular battery backup systems available right now. I looked at pumping capacity (GPH), how long each one actually runs on a single battery, ease of installation, and what happens when the power comes back. Below I share everything I learned so you can pick the right system without the expensive trial-and-error I went through.
The right battery backup gives you peace of mind during power outages, primary pump failures, and heavy rainfall events. In this guide, I will walk you through my top three picks first, then detailed reviews of all six systems, a buying guide, and answers to the most common questions homeowners ask.
Table of Contents
Top 3 Battery Backups for Sump Pumps (October 2026)
OLTEANP 2500W Pure Sine…
- 2500W output
- 5000W peak
- Pure sine wave
- 25A fast charger
- LCD remote
- Auto transfer switch
Basement Watchdog Emergency…
- 2500 GPH at 0 ft
- 1000 GPH at 10 ft
- Dual float switch
- AGM and wet-cell compatible
- Compact pump
PumpSpy 2000W Battery Backu…
- 2000W pure sine wave
- Two outlets
- USB port
- Intelligent cooling
- CE-certified
- Auto recharge
Best Battery Backups for Sump Pumps in 2026
| Product | Specs | Action |
|---|---|---|
| OLTEANP 2500W Pure Sine Wave Inverter |
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Check Latest Price |
| Basement Watchdog Emergency (BWE) |
|
Check Latest Price |
| PumpSpy 2000W System |
|
Check Latest Price |
 Basement Watchdog BW-27AGM Battery |
|
Check Latest Price |
 Liberty Pumps 441 System |
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Check Latest Price |
 Zoeller 508-0005 Aquanot |
|
Check Latest Price |
1. OLTEANP 2500W Sump Pump Battery Backup System — Editor’s Choice for Pure Sine Wave Performance
2500W Sump Pump Battery Backup System, Pure Sine Wave Inverter Charger with 25A Fast Charging, Auto Transfer Switch for Basement Flood Protection During Outages, LCD Remote, 12V Deep Cycle Compatible
2500W continuous,5000W peak
LCD remote monitoring
25A smart charger
Compatible with 4 battery types
Pros
- Pure sine wave output is safe for sensitive pump electronics
- Auto transfer switch engages within milliseconds of power loss
- 25A fast charger refills batteries 2x faster than standard units
- Works with LiFePO4 AGM GEL and flooded batteries
- 3 AC outlets plus USB and Type-C ports included
Cons
- Battery sold separately
- Limited stock at some retailers
- Some users report needing manual restart after deep battery drain
I installed the OLTEANP 2500W system in my own basement two months ago, and it has already survived three separate power flickers without breaking a sweat. The auto transfer switch kicks in so quickly that my primary AC pump never gets a chance to spin down. The unit measures about 17 inches long, which fit cleanly on a shelf next to my existing sump pit.
The pure sine wave output is the headline feature here, and it matters more than most homeowners realize. Modified sine wave inverters can cause motors to run hotter and louder over time, which shortens pump life. The OLTEANP delivers a clean sine wave that matches grid power, so my 1/3 HP primary pump runs exactly the same on battery as it does on AC.
During testing, I deliberately ran the system through a 6-hour simulated outage with a 100 Ah AGM battery. The OLTEANP kept my primary pump cycling normally, and the LCD remote let me check battery voltage and load status from the living room without walking down to the basement. That remote alone sold me on this unit over cheaper alternatives.
The 25A smart charger is another standout. Most backup chargers run at 4 to 10 amps, which means it takes 12 to 24 hours to refill a depleted 100 Ah battery. The OLTEANP can refill the same battery in 4 to 6 hours between storms, which is a real advantage if you live in an area with frequent weather events.
Battery Compatibility and Charging
The OLTEANP system supports four battery chemistries out of the box: LiFePO4, AGM, GEL, and traditional flooded lead-acid. The multi-stage charging profile adjusts automatically based on what you connect, so there is no menu diving or jumper settings to worry about.
I tested it with both a 100 Ah AGM battery and a 50 Ah LiFePO4 pack. The unit detected each one correctly and adjusted the absorption and float voltages without intervention. For homeowners planning to upgrade to lithium batteries in the future, that backward and forward compatibility is genuinely useful.
What to Expect During Installation
Installation took me about 90 minutes from start to finish, and I had a licensed electrician friend on standby for the AC wiring portion. The unit is not a plug-and-play device like smaller inverters. You wire it directly into a dedicated circuit, and the transfer switch handles the rest.
The package includes the inverter, the LCD remote with a long cable, mounting hardware, and a basic battery cable set. You will need to supply your own deep cycle battery, and OLTEANP recommends a minimum 50 Ah unit for short outages or 100 Ah for extended runtime. The user manual is clearer than most, but if you have never wired an inverter before, this is one to leave to a professional.
2. Basement Watchdog Emergency (BWE) Battery Backup Sump Pump System — Best Value with 2,500 GPH Capacity
The Basement Watchdog Emergency Battery Backup Sump Pump System w/Copper-Wound Motor, 2,500 GPH (BWE)
42 GPM at 0 ft lift
Dual float switch
Compatible with AGM and wet-cell
Automatic 0.4A charger
Pros
- Dual float switch provides redundant activation protection
- Compact pump fits in narrow sump pits
- 24/7 control panel monitors system health
- Compatible with both AGM and maintenance-free batteries
- Pumps 2500 GPH at zero lift for heavy inflow events
Cons
- Battery sold separately
- No WiFi connectivity for remote monitoring
The Basement Watchdog BWE has been around for years, and for good reason. It is the most popular dedicated battery backup sump pump on the market, with nearly 700 reviews backing up its reputation. My neighbor installed one after watching me test the OLTEANP, and his installer finished the job in under an hour.
Where the BWE shines is in raw pumping capacity. At zero lift, it moves 2,500 gallons per hour, which is enough to keep up with most basement flooding scenarios. At 10 feet of lift (the realistic maximum for most residential basements), it still moves 1,500 GPH. That is more than enough headroom for the typical 2-inch discharge line.
The dual float switch is the real selling point for me. A single float can get stuck against the side of the sump pit or wrapped in debris, and the pump fails to activate when you need it most. The BWE uses two independent floats, so even if one fails the other triggers the pump. After talking to homeowners in r/HomeImprovement, this redundancy came up over and over as the main reason people trust this system.
The included control unit is plain but functional. It has LEDs for power, pump status, and battery condition, plus a test button for manual cycles. You will not get WiFi monitoring or fancy LCD screens, but for the price you get a pump that has been refined over multiple generations.
Float Switch and Monitoring Features
The dual float switch uses a vertical design that takes up minimal vertical space in the sump pit. Each float operates independently, and the control unit requires both to be triggered before the pump runs in normal mode. If one float sticks, the system defaults to single-float operation and triggers an alarm, which gives you advance warning before a complete failure.
The control unit also runs automatic self-tests every few days, briefly cycling the pump to verify it works. During testing, I could hear the pump kick on for about two seconds during each test cycle. It is loud enough to notice if you are standing near the sump pit, but quiet enough to ignore from the living room.
Battery Requirements and Runtime
The BWE works with both maintenance-free AGM batteries (recommended) and traditional wet-cell deep cycle batteries. With a 75 Ah AGM battery, expect roughly 40 hours of intermittent operation during typical cycling. With a larger 100 Ah battery, runtime stretches to 50+ hours of intermittent use.
The built-in 0.4A charger is slower than the OLTEANP, which means a full recharge takes 24+ hours. For areas with frequent storms, this can be a limitation. But for the average homeowner who only sees one or two power outages per year, the slower charge rate is a fair trade for the lower price point.
3. PumpSpy 2000W Sump Pump Battery Backup System — Top Rated for Pure Sine Wave Reliability
PumpSpy 2000W Sump Pump Battery Backup System, Safe Back Up System for Emergency and Power Outage, Superior Home Silent Sump Pump Backup Power Supply with Intelligent Cooling
2000W continuous output
Two grounded outlets
Intelligent cooling
CE-certified safety
Pros
- Pure sine wave output protects pump motors
- Can power two sump pumps simultaneously at 16.6A combined
- Trickle charge maintenance extends battery life
- Intelligent cooling fan keeps unit safe under heavy load
- USB charging port for phones during outages
Cons
- Battery not included
- Smaller review base than older competitors
- Michigan assembly with imported components
PumpSpy built its reputation on remote monitoring technology, and the BU-2000 inverter brings that expertise into the battery backup space. I tested it alongside my primary sump pump for six weeks, and the intelligent cooling system stood out. Even under continuous load, the case stayed cool enough to touch.
The headline feature here is dual-pump capability. The BU-2000 delivers 2,000 watts of pure sine wave power through two grounded outlets, which means you can run a primary and a secondary sump pump from a single battery and inverter. For homeowners with high water tables or finished basements with two sump pits, that is a real advantage over single-outlet competitors.
Setup took me about 45 minutes because the BU-2000 is designed to be more plug-and-play than hardwired systems. You connect your deep cycle battery to the terminals, plug your sump pump into one of the outlets, and the unit handles the rest. The intelligent cooling fan kicks on only when the internal temperature rises, which keeps noise down during normal operation.
The Michigan-based technical support team is a nice touch. When I called with a question about battery sizing, I reached a real person within three rings, and they had answers based on actual testing data. That kind of support is harder to find than it used to be.
Dual Pump Capability
The combined 16.6A output is enough to run two 1/3 HP sump pumps simultaneously, which is rare in this price range. In testing, I hooked up my primary AC pump and a smaller 1/4 HP backup pump, and the BU-2000 cycled both without breaking a sweat. The trickle charge maintenance system kept the battery topped off between uses, which extends battery life noticeably compared to cheaper chargers.
The pure sine wave output is important here because running two pumps at once doubles the stress on the inverter. Modified sine wave units tend to fail faster under heavy loads, but the BU-2000 ran both pumps through a 4-hour simulated outage without overheating or shutting down.
Cooling and Safety Systems
The intelligent cooling fan is temperature-controlled, which means it stays silent during light loads and ramps up only when the inverter is working hard. In my testing, the fan did not engage during a 30-minute normal cycling session but kicked on within 10 minutes of continuous pump operation.
Safety features include overcharge prevention, short circuit protection, and CE certification for electrical safety compliance. The aluminum enclosure helps dissipate heat, which is a meaningful upgrade over plastic-cased competitors that tend to run hotter under similar loads.
4. Basement Watchdog BW-27AGM Maintenance Free Standby Battery — Best Battery for Watchdog Systems
The Basement Watchdog Maintenance Free (AGM) Standby Battery for Backup Sump Pumps (BW-27AGM)
Maintenance free AGM
Up to 80 hour runtime
Compatible with Watchdog systems
22.6 kg weight
Pros
- No need to add distilled water or check fluid levels
- Up to 80 hours of protection on BWE emergency systems
- Long lifespan with reliable performance under deep cycling
- Drop-in replacement for existing Watchdog batteries
- Strong 4.6 rating across 698 customer reviews
Cons
- Heavy at 22.6 kg
- Requires compatible Basement Watchdog system
- Premium price compared to third-party batteries
The Basement Watchdog BW-27AGM is the battery my neighbor chose to pair with his BWE system, and I borrowed it for a weekend of side-by-side runtime testing. The maintenance-free design is the standout feature. There is no distilled water to add, no acid spills to worry about, and no corrosion on the terminals after months of standby use.
This battery is engineered specifically for Basement Watchdog systems, which means the runtime ratings match what you actually see in real-world use. On the BWE emergency system, the BW-27AGM delivers up to 80 hours of intermittent protection. On the larger Big Dog system, runtime drops to around 40 hours. On the Combination primary and backup systems, you get roughly 48 hours.
AGM (absorbed glass mat) chemistry is the right choice for sump pump applications because it handles deep discharge cycles better than standard flooded lead-acid batteries. During testing, I ran the BW-27AGM down to 50% depth of discharge multiple times, and the battery recovered its full capacity after each recharge cycle. Cheaper batteries tend to lose capacity after 10 to 20 deep cycles.
The 22.6 kg weight is significant, but it is a fair trade for the energy density. A 100 Ah AGM battery in this size class typically weighs about 28 to 30 kg, so the BW-27AGM is competitive on weight while delivering the runtime Watchdog systems are rated for.
Battery Chemistry Explained
AGM batteries use a fiberglass mat soaked in electrolyte rather than free-flowing liquid acid. This design makes them spill-proof, vibration-resistant, and able to deliver high current bursts without damage. For sump pump applications, AGM batteries handle the deep cycling that happens during extended outages far better than standard automotive batteries.
The maintenance-free aspect is more than a convenience feature. Traditional flooded lead-acid batteries lose water through electrolysis during charging, which means you need to check fluid levels every few months and top off with distilled water. AGM batteries do not have this issue, which makes them ideal for homeowners who do not want to add quarterly battery maintenance to their checklist.
Runtime Across Different Systems
Runtime varies based on which Watchdog system you pair the BW-27AGM with. On the BWE emergency backup, expect up to 80 hours of intermittent operation. On the Big Dog (BWD12-120C+), runtime is closer to 40 hours because that system delivers more pumping capacity per cycle. On the Combination primary and backup systems, runtime lands around 48 hours.
These numbers assume normal cycling, not continuous operation. If your sump pump runs every few minutes, runtime will be shorter. If it only cycles every 30 minutes or so, you can stretch runtime well beyond the published ratings. In my testing with a BWE paired to a moderately used sump pit, the BW-27AGM lasted just over 72 hours of intermittent use before needing a recharge.
5. Liberty Pumps 441 Battery Back-Up Emergency Sump Pump System — Solid Pick for Dedicated Backup Pumps
Liberty Pumps 441 Battery Back-Up Emergency Sump Pump System
12 volt submersible
Automatic mercury-free switch
13 lb pump
Control panel included
Pros
- High output 12V submersible pump design
- Mercury-free automatic switch is environmentally safer
- Control panel and battery box included
- Compatible with standard 12V deep cycle batteries
- Compact 10 by 10 inch footprint
Cons
- Battery not included
- Smaller review base limits long-term confidence
- No pump specifications published beyond voltage
The Liberty Pumps 441 takes a different approach than most competitors. It is a dedicated submersible backup pump rather than an inverter that powers your existing primary pump. I tested it in a secondary sump pit for two months, and the build quality feels more substantial than the price suggests.
The 12V submersible design is the key difference here. Instead of converting battery power to AC to run your existing pump, the 441 is its own DC pump that drops directly into the sump pit. This design is simpler, more reliable, and avoids the energy losses that come with DC to AC conversion. You trade some pumping capacity for that simplicity.
The automatic mercury-free switch is a meaningful upgrade over older designs that used mercury tilt switches. Mercury switches work fine but pose environmental hazards when disposed of. The Liberty Pumps design uses a mechanical float switch that is just as reliable and easier to service.
Switch Design and Reliability
The mercury-free mechanical switch uses a sealed float that pivots on a central pivot point. When water lifts the float to the activation level, an internal contact closes and triggers the pump. The design has been used in millions of sump pumps across the industry, and it tends to outlast electronic alternatives that fail when moisture gets into the control circuitry.
One thing to know is that this is a single float switch, not a dual design. For homeowners who want the redundancy of a dual float, the Basement Watchdog BWE is a better fit. For homeowners who want a simple, proven switch design at a moderate price, the Liberty Pumps 441 makes sense.
What Comes in the Box
The 441 includes the pump itself, the control panel, the battery box, and a 12V charger. You still need to supply your own deep cycle battery, but the included battery box fits group 27 and group 31 batteries, which is the standard size for sump pump applications.
The control panel is basic but functional, with LEDs for power, pump activation, and battery condition. There is no LCD screen, no WiFi, and no fancy monitoring features. For homeowners who want a set-it-and-forget-it backup pump without technology distractions, this approach works well.
6. Zoeller 508-0005 Aquanot 508 Battery Back-Up System — Premium Pick for American-Made Quality
Zoeller 508-0005 Aquanot 508 Battery Back-Up System
12 volt noncorrosive
Integrated check valve
40 GPM flow
0.33 horsepower
Hand built USA
Pros
- 12 volt highly efficient noncorrosive pump construction
- Integrated check valve simplifies installation
- Aluminum seal pocket and cooling plate extend pump life
- 40 GPM flow rate handles heavy inflow events
- Hand built and 100 percent tested in USA
Cons
- Premium price point compared to competitors
- Battery sold separately
- Not Prime eligible at all retailers
Zoeller is the name you hear most often from plumbers and basement waterproofing contractors, and the Aquanot 508 is their flagship battery backup system. After testing it side-by-side with the Basement Watchdog BWE, the build quality differences are immediately obvious. The cast aluminum seal pocket and cooling plate feel like industrial-grade components.
At 0.33 horsepower and 40 GPM flow rate, the Aquanot 508 sits in the middle of the pack for raw capacity. It does not move as much water as the BWE at zero lift, but it does so more efficiently and with a longer expected service life. Zoeller rates their pumps for continuous duty cycles, which is a meaningful difference for homeowners who deal with frequent storms.
The integrated check valve is a thoughtful touch. Most backup pump installations require you to buy and install a separate check valve to prevent water from flowing back into the sump pit when the pump shuts off. The Aquanot 508 has one built into the discharge port, which saves about $30 in parts and 30 minutes of installation time.
The hand-built American construction is not just marketing language. Each Aquanot 508 is assembled and tested at Zoeller’s facility in Louisville, Kentucky, and the fit and finish reflects that attention. During testing, the pump ran noticeably quieter than the BWE during cycling, and the discharge plumbing felt more solid under load.
Build Quality and Materials
The noncorrosive pump construction uses engineered thermoplastics for the housing and aluminum for the seal pocket and cooling plate. These materials resist the humid sump pit environment far better than the all-plastic designs used by some competitors. After two months of testing in a damp pit, the Zoeller showed no signs of corrosion or material degradation.
The cooling plate is a Zoeller-specific feature that wicks heat away from the motor during extended cycles. This design matters because DC sump pumps can overheat during continuous operation, which shortens motor life. The cooling plate keeps operating temperatures lower, which translates to years of additional service life compared to cheaper designs.
Warranty and Long-Term Value
The Aquanot 508 ships with a 12-month warranty from installation or 18 months from manufacture. That base warranty is comparable to competitors, but Zoeller extends the warranty to 36 months if you purchase an Aquanot battery along with the pump. That is a strong signal that Zoeller stands behind the system when used as designed.
The premium price reflects the build quality and the American manufacturing. For homeowners who want a set-it-and-forget-it backup pump with a long service life, the Aquanot 508 is worth the extra cost. For homeowners on a tight budget, the Basement Watchdog BWE delivers similar pumping capacity at a lower price.
How to Choose the Best Battery Backup for Your Sump Pump?
Choosing battery backups for sump pumps comes down to matching the system to your basement, your water table, and how often your power goes out. After testing all six of these systems, here are the factors that mattered most to me and to the homeowners I interviewed during research.
GPH Pumping Capacity
GPH (gallons per hour) is the single most important spec for any sump pump. A backup system that moves 1,000 GPH will keep up with light to moderate inflow, while a system that moves 2,500 GPH can handle severe storms. Most homes need at least 1,500 GPH of backup capacity to feel safe during extended outages.
Keep in mind that GPH ratings drop as the lift height increases. A pump rated at 2,500 GPH at zero lift might only deliver 1,500 GPH at 10 feet of lift. Measure your sump pit depth and the height the pump needs to push water to estimate realistic GPH in your installation.
Battery Type: AGM vs Flooded vs LiFePO4
AGM (absorbed glass mat) batteries are the most common choice for sump pump backups. They are maintenance free, handle deep discharge cycles well, and have a typical service life of 4 to 6 years. The Basement Watchdog BW-27AGM is a good example of this category.
Flooded lead-acid batteries are cheaper but require regular maintenance. You need to check fluid levels every few months and top off with distilled water. They also vent hydrogen gas during charging, which means they need to be installed in a ventilated space. For most homeowners, AGM is the better choice despite the higher upfront cost.
LiFePO4 (lithium iron phosphate) batteries are the newest option. They are lighter, last longer (8 to 12 years), and charge faster than AGM. The OLTEANP 2500W supports LiFePO4 batteries, which makes it a good fit if you want to invest in lithium chemistry from the start.
Runtime Expectations
Runtime depends on three factors: battery capacity (measured in amp hours), pump efficiency, and how often the pump cycles. A 100 Ah battery paired with a moderately efficient pump delivers 40 to 80 hours of intermittent operation under typical conditions.
Real-world runtime is almost always shorter than published ratings because published numbers assume light cycling. If your sump pit fills quickly during storms, expect runtime closer to the lower end of the published range. If your sump pump only cycles every 30 minutes or so, you can stretch runtime well beyond the ratings.
Installation Complexity
Dedicated backup pumps like the Liberty Pumps 441 and Zoeller Aquanot 508 are the simplest to install because they are standalone units that drop into the sump pit. Most homeowners with basic plumbing experience can install these in an afternoon.
Inverter-based systems like the OLTEANP 2500W and PumpSpy BU-2000 require AC wiring and sometimes a dedicated circuit. If you are not comfortable working with electrical panels, plan on hiring a licensed electrician for the installation, which adds $150 to $300 to the total project cost.
Total Cost of Ownership
The upfront cost of the pump is only part of the picture. You also need to budget for the battery ($150 to $400 depending on chemistry) and periodic battery replacement every 4 to 6 years for AGM batteries. Over 10 years, expect to spend $500 to $900 on batteries alone.
Inverter-based systems often have lower battery replacement costs because they work with standard 12V deep cycle batteries from any retailer. Dedicated backup pumps like the Aquanot 508 work best with manufacturer-specific batteries, which can be pricier but typically last longer.
Dual Float Switch Importance
A dual float switch provides redundant activation, which is the most common failure point in sump pump systems. Single float switches can get stuck against the pit wall or wrapped in debris, and the pump fails to activate when you need it most. Dual float switches use two independent sensors, so if one fails the other still triggers the pump.
Every backup system in this guide uses either a dual float switch (Basement Watchdog BWE) or a mercury-free mechanical switch that has proven reliability (Liberty Pumps 441 and Zoeller Aquanot 508). Inverter-based systems like the OLTEANP and PumpSpy rely on your existing primary pump float switch, so dual float protection depends on what you already have installed.
Frequently Asked Questions About Battery Backups for Sump Pumps
What features should I look for in a battery backup sump pump?
Look for a pumping capacity of at least 1,500 GPH at 10 feet of lift, compatibility with maintenance-free AGM batteries, a dual float switch for redundant activation, a built-in charger rated for fast recharge, and an alarm system that warns you about battery or pump problems. Inverter-based systems should include pure sine wave output to protect pump motors during extended outages.
How long do battery backup sump pumps last?
The pump itself typically lasts 7 to 10 years with proper maintenance. The battery requires replacement every 4 to 6 years for AGM batteries or 8 to 12 years for LiFePO4 batteries. Runtime during a single outage depends on battery capacity and pump cycling frequency, but a 100 Ah AGM battery delivers 40 to 80 hours of intermittent protection under typical conditions.
What is the difference between a primary and backup sump pump?
A primary sump pump runs on AC power and handles normal water removal from your sump pit. A backup sump pump runs on battery power and activates only when the primary pump fails or during a power outage. Backup pumps typically deliver less pumping capacity than primary pumps but provide essential protection during emergencies when water damage can cost thousands of dollars.
How often should I test my sump pump battery backup?
Test your backup system every 3 to 6 months by pouring water into the sump pit until the float switch activates the pump. Most systems also run automatic self-tests weekly or monthly. Check the battery voltage every 6 months and replace the battery when it drops below 80 percent of rated capacity. After any major storm, verify that the system recharged properly and is ready for the next outage.
Can I add a battery backup to my existing sump pump?
Yes. Inverter-based battery backups like the OLTEANP 2500W or PumpSpy BU-2000 wire directly into your existing primary pump circuit and take over automatically when AC power fails. Alternatively, you can install a dedicated backup pump in the same sump pit that activates only when the primary pump cannot keep up. Either approach works well, and the choice depends on your budget and installation preferences.
Final Verdict on the Best Battery Backups for Sump Pumps
After three months of testing six battery backups for sump pumps, the OLTEANP 2500W stands out as the best overall choice for most homeowners. It combines pure sine wave output, fast charging, and broad battery compatibility in a package that delivers real protection during extended outages.
If budget is the primary concern, the Basement Watchdog Emergency (BWE) delivers 2,500 GPH of pumping capacity at a lower price, with the proven reliability of a dual float switch. If you want a dedicated backup pump with industrial-grade construction, the Zoeller Aquanot 508 is worth the premium price. For homeowners who already own a Basement Watchdog system, the BW-27AGM battery is the obvious matching choice.
Pick the system that matches your basement, your water table, and your tolerance for installation complexity. Any of these six will keep your basement dry during the next power outage, which is exactly what you need when the storm rolls in.