Basement flooding can cause costly damage and create ongoing headaches for homeowners, especially during heavy storms or unexpected power outages. Relying on a standard sump pump alone leaves your home vulnerable when the electricity goes out, making backup protection a critical consideration.
Combo sump pumps with battery backup provide peace of mind by automatically switching to battery power when needed, ensuring your basement stays dry no matter the conditions. In this guide, we review the best options available, highlighting their strengths, unique features, and what to consider before making your choice.
Top 5 Best Combo Sump Pumps With Battery Backup
To save you time and guesswork, we researched and compared top-rated best Combo Sump Pumps With Battery Backup products and selected the best options available today.
1. THE BASEMENT WATCHDOG Big Combo CONNECT Sump Pump System
Flooding risks increase dramatically during power outages, and a reliable combo sump pump with battery backup is essential for continuous basement protection. This system offers both primary and backup pumps in one preassembled unit, addressing the need for seamless operation when the power fails.
What sets this model apart is its WiFi-capable monitoring system, which keeps you informed about pump status, power, and battery health. It's ideal for homeowners who want remote alerts and easy maintenance guidance, making it a great fit for tech-savvy users or those who travel frequently.
- Energy-efficient PSC motor helps reduce electricity costs over time
- WiFi-capable battery backup provides 24/7 monitoring and real-time alerts (CONNECT Module sold separately)
- Flexible battery compatibility allows use with both AGM and wet-cell batteries, and supports dual-battery setups for extended runtime
Compared to standard combo pumps, this model prioritizes smart monitoring and user-friendly maintenance. The tradeoff is that full remote alert functionality requires an additional module purchase.
- Preassembled for easy installation
- WiFi monitoring capability
- Compatible with multiple battery types
- Can double runtime with two batteries
- Clear maintenance alerts
- CONNECT Module sold separately
- No included battery
2. Wayne 1/2 HP Sump Pump with Battery Backup
Water intrusion from storms or melting snow can overwhelm a basement quickly, especially if the power goes out. This combo sump pump system is designed for rapid installation and dependable operation, providing both primary and backup protection in one package.
The Wayne system arrives preassembled and is ready for drop-in installation, making it a strong choice for homeowners who want a straightforward setup. It's well-suited for those who need reliable flood prevention without complicated assembly or wiring.
- Preassembled design enables installation in 15 minutes or less
- High-capacity primary pump moves up to 5,100 GPH for robust water removal
- Tested for 1 million cycles for long-lasting, dependable use
Unlike more complex systems, this model emphasizes ease of use and installation speed. The main tradeoff is that the required backup battery is not included.
- Fast drop-in installation
- High water removal capacity
- Fits standard sump basins
- Long cycle-tested durability
- 3-year warranty
- Battery not included
- Indoor use only
3. Star Basement Sentry Sump Pump Combo System
A sudden power outage can leave your basement vulnerable to flooding, but a combo sump pump with a robust battery backup system offers a strong line of defense. This unit provides comprehensive protection with both a primary and backup pump, plus thoughtful battery management features.
The Star Basement Sentry stands out for its battery box, which extends battery life, and a fast charger that keeps the system ready for emergencies. It's a great fit for homeowners who want extra assurance that their backup will last through extended outages.
- Battery box extends battery life for longer backup operation
- 2x faster battery charger ensures system readiness
- Complete kit includes controller, alarm, and float switch for all-in-one protection
Compared to other options, this system focuses on maximizing battery longevity and readiness. The tradeoff is that the recommended maintenance-free battery is sold separately.
- Extends battery lifespan
- Fast battery charging
- Comprehensive kit included
- No acid maintenance with AGM battery
- Preassembled for convenience
- Battery sold separately
- Less known brand
4. Westinghouse 1/2 HP Battery Backup Sump Pump System
Basement flooding can be especially challenging in homes with limited sump pit space. This combo sump pump system is engineered to fit tight areas while delivering continuous protection during both normal operation and power outages.
The Westinghouse model features a compact, space-saving design with durable stainless steel construction, making it suitable for both residential and light commercial use. It's ideal for those with smaller sump pits or who need a robust, low-profile solution.
- Compact design fits tight sump pits and maximizes installation flexibility
- Dual-pump system provides seamless automatic switchover during outages
- Stainless steel housing resists corrosion for long-term durability
Compared to bulkier alternatives, this system prioritizes space efficiency and rugged build quality. The tradeoff is that the battery is not included and must be purchased separately.
- Fits small sump pits
- Durable stainless steel build
- Automatic emergency switchover
- Energy-efficient operation
- Suitable for light commercial use
- Battery not included
- No WiFi monitoring
5. Basement Sentry Sump Pump and Battery Backup Combo
Protecting your basement from water damage is crucial, and a combo sump pump with battery backup offers a simple, effective solution. This system provides both primary and backup pumping capability, ensuring your basement stays dry during storms and outages.
This Basement Sentry combo is a straightforward choice for homeowners seeking reliable, no-frills protection. It's best for those who want a basic, easy-to-use system without extra features or complex installation.
- Combined primary and backup pumps deliver continuous protection
- Simple design makes operation and maintenance easy
- Battery backup ensures pumping during power loss
Compared to more feature-rich models, this option prioritizes simplicity and ease of use. The tradeoff is a lack of advanced monitoring or battery management features.
- Straightforward operation
- Combined pump system
- No complex setup
- Reliable backup protection
- Limited advanced features
- Minimal included accessories
Buying Guide: How to Choose the Best Combo Sump Pump With Battery Backup
Combo sump pumps with battery backup are essential for protecting basements from flooding, especially during power outages. Choosing the right system involves understanding the technical differences between models, the tradeoffs in installation and maintenance, and the common misconceptions about what features truly matter. Many buyers overlook the importance of battery compatibility, monitoring features, and fit for their specific sump pit size.
- Combo systems vs. backup-only pumps: Some products include both a primary and a backup pump, while others are designed as backup-only units to supplement an existing primary pump.
- Fit and sump pit size: Not all systems fit every sump pit; compact and narrow-pit models are available for smaller installations.
- Battery compatibility and runtime: Battery type (AGM vs. wet-cell), battery life extension features, and the ability to use multiple batteries affect how long your system will run during outages.
- Monitoring and alerts: WiFi-enabled and smart monitoring systems provide real-time alerts, while basic models may only offer audible alarms or indicator lights.
- Ease of installation: Preassembled systems can save time and reduce installation errors, but may be less customizable.
- Maintenance requirements: Maintenance-free batteries and diagnostic alerts can reduce upkeep, but some systems require periodic checks or fluid refills.
- Misunderstandings: Many buyers assume all combo systems include a battery or that all will fit their existing sump pit—always check compatibility and included components.
Choosing Between Combo and Backup-Only Systems
The first decision is whether you need a full combo system (primary plus backup pump) or just a backup pump to add to your existing setup. Combo systems are ideal for new installations or full replacements, while backup-only units are best for supplementing a working primary pump.
- Combo systems: Provide seamless protection and are often preassembled for easy installation.
- Backup-only pumps: Offer flexibility and can be added to most existing sump setups.
Sump Pit Size and Installation Constraints
Not all basements have the same sump pit dimensions. Compact and narrow-pit models are designed to fit where standard systems cannot. Always measure your pit before purchasing to ensure compatibility.
- Compact models: Fit pits as small as 12 inches in diameter.
- Standard models: Typically require 14–16 inch diameter pits.
Battery Type, Runtime, and Maintenance
Battery choice impacts both runtime and maintenance. AGM batteries are maintenance-free and last longer, while wet-cell batteries may require periodic fluid checks. Some systems allow dual batteries for extended operation.
- AGM batteries: No fluid maintenance, longer life.
- Wet-cell batteries: Lower upfront cost but require more upkeep.
- Dual-battery support: Doubles backup runtime for extended outages.
Monitoring, Alerts, and Ease of Use
Advanced systems offer WiFi monitoring and smartphone alerts, while basic models provide simple alarms or indicator lights. Consider how much remote monitoring you need based on your lifestyle and travel habits.
- WiFi-enabled systems: Offer real-time status and alerts.
- Basic alarms: Provide local notifications only.
Final Buying Advice
Choosing the right combo sump pump with battery backup comes down to matching your basement's needs with the system's features. Consider your sump pit size, desired level of monitoring, and how much maintenance you're willing to perform.
- Measure your sump pit before buying to ensure compatibility
- Decide if you need a full combo system or just a backup pump
- Check if the battery is included or must be purchased separately
- Consider maintenance-free batteries for less upkeep
- Don't overbuy on features you won't use, but don't skimp on protection if your area is prone to flooding
FAQ For Combo Sump Pumps With Battery Backup
1. Do combo sump pump systems include the battery?
2. How do I know if a sump pump system will fit my pit?
3. What is the difference between AGM and wet-cell batteries?
4. Are WiFi monitoring features necessary?
5. Can I add a backup-only pump to my existing sump system?
6. How often should I test or maintain my sump pump system?
James Vega
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