4 Best Deep Cycle Battery For Sump Pump 2025 in the United States

The Interstate Batteries 12V 75Ah Deep Cycle Mobility Battery (DCM0075) is designed for heavy-demand deep-cycle usage, making it suitable for sump pumps and other devices like wheelchairs and scooters. With a capacity of 75Ah and a voltage of 12V, it can handle significant energy loads. The AGM and VRLA technology ensure it is spill-proof, maintenance-free, and rechargeable, which adds convenience and reliability.

The battery's size (10.24” x 6.61” x 8.19”) and weight (49 pounds) make it relatively compact but might be heavy for some users to handle easily. It boasts a high cycle life, meaning it can be discharged and recharged many times, which is ideal for sump pumps that may need frequent use during heavy rain seasons. Additionally, it has a 12-month performance warranty and adheres to rigorous testing standards, promising quality and dependability.

However, it might be overkill for less demanding applications, and its weight could be a drawback for some users. If you require a robust, reliable power source for a sump pump, this battery is a solid choice, though it's important to ensure the size and weight are manageable for your setup.

The ML100-12 SLA battery is a 12V 100Ah Group 27 Sealed Lead Acid battery intended for use with sump pumps, particularly Zoeller models. It provides a substantial battery capacity of 100Ah, ensuring a reliable backup power source for extended periods. The 12V voltage is standard and compatible with various sump pump systems. Being a Sealed Lead Acid (SLA) battery, it is maintenance-free and offers high discharge rates, making it suitable for emergencies where quick power delivery is essential.

Additionally, the battery is designed to withstand wide operating temperatures, making it effective in both high and low-temperature environments, which is crucial for sump pumps that operate in basements and other areas with fluctuating conditions. The battery also boasts deep discharge recovery, which means it can recharge effectively even after being significantly drained, enhancing its cycle life and longevity. The dimensions are reasonably compact at 12.09 x 6.65 x 8.48 inches, but the weight of 60 pounds might be cumbersome for some users when handling or installing the battery.

The product's ability to resist shocks and vibrations adds to its durability, ensuring it remains functional in less-than-ideal conditions. However, it is important to note that the battery does not come with a wire harness or mounting accessories, meaning additional purchases might be necessary for complete installation. With a full one-year warranty, users have some assurance of quality and reliability. Ideal for homeowners seeking a robust and reliable backup power source for their sump pump, the ML100-12 SLA battery is a solid choice despite its weight and need for additional accessories.

The VMAXTANKS SLR125 Solar Battery is a robust choice for a deep-cycle battery, particularly for sump pumps. It offers a substantial battery capacity of 125Ah, ensuring long-lasting power for emergency backup and continuous operation. With a 12-volt voltage, it is compatible with common sump pump setups. This battery uses AGM (Absorbed Glass Mat) technology, which is known for its maintenance-free operation and high safety standards, as it does not emit dangerous fumes or gases.

Additionally, the military-grade custom-made plates contribute to its durability and reliability, making it suitable for heavy-duty applications, including solar and wind power integration. The battery boasts an impressive cycle life with a float service lifespan of 8 to 10 years, indicating long-term usability without frequent replacements. Its dimensions and weight (75 pounds) might be considered bulky, but the carrying strap provided can aid in transportation and installation.

In summary, the VMAXTANKS SLR125 Solar Battery excels in power capacity, safety, and longevity, making it a strong contender for sump pump applications, though its weight might be a potential concern for some users.