For long outages, choose a backup system based on how long it can run your specific pump, not inverter wattage alone. Of these options, WAYNE’s integrated sump system is the only listing that states a backup pumping figure: up to 10,000 gallons on one charge, using a required 75 Ah battery that is not included. The inverter units need a separately purchased battery, and their runtime is not listed.
The five listings below include complete systems, battery-only equipment, and a water-powered pump. They are not interchangeable. Prices may change.
At a glance
| Option | What it provides | Long-outage consideration |
|---|---|---|
| WAYNE integrated sump system | Primary pump plus 12 V battery backup capability | Listing claims up to 10,000 gallons per backup charge with a separate 75 Ah battery. Runtime in hours is not stated. |
| OLTEANP 2500W inverter | Automatic transfer, 25 A charger, pure sine wave output | Battery required and not included. Runtime and pump-specific compatibility are not stated. |
| Miumoon 1500W inverter | Automatic transfer, 20 A charger, LCD | Battery required and not included. Listing recommends AGM or another deep-cycle battery. |
| Liberty Pumps SumpJet | Water-powered emergency backup pump | Does not use a battery, but needs a suitable water supply. The listing gives an inlet pressure range of 20 to 100 psi. |
| Westinghouse 12 V 75 Ah AGM battery | Replacement or add-on battery | Battery only. Requires a compatible backup system; it is not a pump or inverter. |
Options and tradeoffs
WAYNE integrated system: primary pump and battery backup
The WAYNE 1/2 HP system pairs a primary sump pump with 12 V battery backup capability. Its listing says it can pump up to 5,100 gallons per hour and remove up to 10,000 gallons on one backup charge. A WAYNE WSB1275 75 Ah battery is required but not included. These are manufacturer listing claims, not a guarantee of performance in every pit or installation.
Pros: Integrated primary and backup arrangement; stated backup volume; preassembled design; three-year warranty stated in listing.
Cons: Battery sold separately; backup duration in hours is not given; system is for indoor use and needs a sump basin 16 inches or larger, according to the listing.
Who should skip it: Skip if you need a battery included, have a smaller basin, or need a published runtime estimate for your pumping conditions.
OLTEANP 2500W inverter: more stated output, battery sold separately
This inverter has a stated 2500 W pure sine wave output, automatic transfer, and a 25 A charger. It supports 12 V deep-cycle batteries, including LiFePO4, AGM, GEL, and flooded types. The battery is not included. Its wattage indicates power output, not how many hours it can keep a pump running.
Pros: Automatic transfer; several stated deep-cycle battery chemistries; LCD remote; stated overload, short-circuit, low-voltage, overcharge, and overheat protections.
Cons: No battery included; runtime and supported pump starting load are not specified in the published details. Confirm both with the manufacturer and your pump documentation.
Who should skip it: Skip if you want a complete battery-and-pump package or cannot confirm your pump’s running and startup requirements.
Miumoon 1500W inverter: lower stated output with built-in charger
The Miumoon unit states 1500 W output, a maximum output current of 13.6 A, automatic switching, and a built-in 20 A charger. It requires a separately purchased deep-cycle battery, with AGM recommended by the listing. The published information does not state runtime or a pump-specific starting-load limit.
Pros: Automatic transfer; built-in charger; LCD; listed overheat, short-circuit, low-voltage, overload, and overcharge protections.
Cons: Battery not included; less stated output than the OLTEANP unit; no outage runtime or pump-specific compatibility details listed.
Who should skip it: Skip if your pump’s startup demand is unknown or exceeds the unit’s documented capacity, or if you need a runtime figure before buying.
Liberty Pumps SumpJet: water-powered backup, not a battery system
The SumpJet is a fully automatic, water-powered emergency sump pump. It accepts inlet supply pressure from 20 to 100 psi and is described as compact and fully assembled. Because it is water-powered, it avoids dependence on a backup battery, but the published details do not state pumping capacity or how much water supply it consumes.
Pros: No battery required; automatic operation; stated inlet pressure range; fully assembled.
Cons: Requires an appropriate pressurized water supply; capacity, water use, and performance during a municipal water interruption are not stated.
Who should skip it: Skip if your water supply may also fail during outages, or if you cannot confirm that supply pressure and plumbing arrangement meet product requirements.
Westinghouse 12 V 75 Ah AGM battery: component, not complete backup
This sealed AGM battery is listed at 12 V and 75 Ah, with maintenance-free construction for sump pump backup systems. It can serve only where the backup system supports the battery’s voltage, chemistry, and capacity. It does not include a pump, charger, or inverter in the published product details.
Pros: Stated 12 V, 75 Ah capacity; sealed AGM construction; intended for sump pump backup systems.
Cons: Battery alone; compatibility with a particular charger or backup system must be confirmed; no runtime is stated.
Who should skip it: Skip if you need a complete backup system or your inverter manufacturer does not approve this battery type and capacity.
How to judge backup for a long outage
Battery capacity alone cannot predict how long a sump pump will run. Runtime depends on battery energy, inverter losses, pump power draw, and how often the pump cycles. A higher watt rating describes the inverter’s power capability, not stored energy or guaranteed outage duration.
- Check the pump’s required voltage, running watts or amps, and startup demand in its exact-model documentation.
- Confirm backup inverter output and battery compatibility, including voltage and approved battery chemistry.
- Ask for a runtime estimate based on your pump load and the specific battery. Do not treat a stated gallons-per-charge figure as hours of operation.
- For long outages, consider whether a second battery is supported, and how the system indicates low battery or fault conditions. Verify these details in product documentation.
- Keep the sump pit, discharge line, and backup system accessible for inspection. Follow product instructions for installation and electrical safety.
Bottom line
Consider the WAYNE system if you want a combined primary pump and backup arrangement and its stated 75 Ah battery requirement fits your setup. Consider an inverter only after confirming pump startup compatibility and obtaining a battery-specific runtime estimate. Choose the SumpJet only where suitable water pressure and supply remain available. The Westinghouse battery is an accessory, not a standalone backup.
Before purchase, compare your pump documentation with the exact backup system instructions. Electrical connections and battery installation must follow manufacturer directions; use a qualified professional if installation requirements are unclear.
Pros
- Provides a dedicated outage backup for primary or secondary sump pump systems.
- Supports several common 12V deep-cycle battery types, including LiFePO4, AGM, GEL, and flooded batteries.
Cons
- A compatible 12V deep-cycle battery must be purchased separately.
- The 16.93-inch length and dedicated installation format may require a suitable location near the sump pump and power connections.
Best For / Avoid If
Best for buyers prioritizing
- Provides a dedicated outage backup for primary or secondary sump pump systems.
- Supports several common 12V deep-cycle battery types, including LiFePO4, AGM, GEL, and flooded batteries.
- Includes battery cables, a UPS plug, remote controller, and user manual.
Consider another option if
- A compatible 12V deep-cycle battery must be purchased separately.
- The 16.93-inch length and dedicated installation format may require a suitable location near the sump pump and power connections.
- Actual backup runtime depends on the connected battery and the load, which are not specified in the provided product details.
Pros
- Maintenance-free sealed lead acid design simplifies ongoing ownership.
- Purpose-built positioning for battery backup sump pump systems suits outage preparedness.
Cons
- Specific compatible sump pump system models are not listed, so fit should be confirmed before ordering.
- The 11 x 7 x 10 inch footprint may require careful placement in compact battery compartments.
Best For / Avoid If
Best for buyers prioritizing
- Maintenance-free sealed lead acid design simplifies ongoing ownership.
- Purpose-built positioning for battery backup sump pump systems suits outage preparedness.
- Indoor-friendly construction helps reduce concerns about leaks and spills.
Consider another option if
- Specific compatible sump pump system models are not listed, so fit should be confirmed before ordering.
- The 11 x 7 x 10 inch footprint may require careful placement in compact battery compartments.
- The available details do not specify runtime during an outage.
Pros
- Automatic transfer to battery power can help maintain sump pump operation during an outage.
- The LCD display makes operating and battery information easier to monitor.
Cons
- The battery must be purchased separately, so the system is not ready to use immediately out of the package.
- It is intended for deep-cycle batteries, with AGM batteries recommended, and is not suitable for non-deep-cycle batteries.
Specifications
| Color | Black |
|---|---|
| Size | 1500Watt |
| Weight | 9 pounds |
| Product Group | Home Improvement |
| Binding | Tools & Home Improvement |
Verify the current product variation before purchase; specifications may change.
Best For / Avoid If
Best for buyers prioritizing
- Automatic transfer to battery power can help maintain sump pump operation during an outage.
- The LCD display makes operating and battery information easier to monitor.
- Multiple protective functions and a built-in cooling system support safer day-to-day use.
Consider another option if
- The battery must be purchased separately, so the system is not ready to use immediately out of the package.
- It is intended for deep-cycle batteries, with AGM batteries recommended, and is not suitable for non-deep-cycle batteries.
- Users must assemble the AC and DC cables before operation, which may require extra setup for first-time buyers.
Pros
- Combination primary and battery-backup system in one preassembled unit
- Integrated vertical float switch for automatic operation
Cons
- Battery is not included and a 40 AH or 75 AH deep cycle battery is required for backup use
- Indoor use only, so it is not intended for outdoor installations
Best For / Avoid If
Best for buyers prioritizing
- Combination primary and battery-backup system in one preassembled unit
- Integrated vertical float switch for automatic operation
- Tested to 1 million cycles for durability-focused design claims
Consider another option if
- Battery is not included and a 40 AH or 75 AH deep cycle battery is required for backup use
- Indoor use only, so it is not intended for outdoor installations
- Needs a sump basin at least 16 inches in diameter, which may not fit smaller pits
Pros
- Automatic functionality supports a simpler backup-pump setup.
- High-output flow rates are a useful feature for emergency sump applications.
Cons
- The pump requires an inlet water supply within the listed 20 to 100 psi range, so buyers must verify their available pressure.
- The 7.5 x 22 x 18.5-inch dimensions may require careful planning in smaller sump or utility areas.
Specifications
| Color | Gray |
|---|---|
| Size | 1-1/2" |
| Dimensions | 7.5 x 22 x 18.5 inches |
| Weight | 5 pounds |
| Product Group | Home Improvement |
| Binding | Tools & Home Improvement |
Verify the current product variation before purchase; specifications may change.
Best For / Avoid If
Best for buyers prioritizing
- Automatic functionality supports a simpler backup-pump setup.
- High-output flow rates are a useful feature for emergency sump applications.
- Fully assembled construction and a 5-pound weight may make handling more convenient.
Consider another option if
- The pump requires an inlet water supply within the listed 20 to 100 psi range, so buyers must verify their available pressure.
- The 7.5 x 22 x 18.5-inch dimensions may require careful planning in smaller sump or utility areas.
- The provided product information does not specify additional accessories or installation details.
For related plumbing equipment comparisons, see our smart water shutoff valve guide and leak detectors with automatic shutoff.
