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

The Renogy Deep Cycle AGM Battery offers a strong 200 Amp Hours capacity at 12 volts, making it well-suited for powering sump pumps and other home or off-grid appliances that need reliable, sustained energy. Its AGM (Absorbent Glass Mat) design means it’s maintenance-free and sealed, reducing the risk of acid leaks and eliminating the need for regular upkeep. This battery stands out with a low self-discharge rate of just 3% per month, helping it hold charge longer when not in use, which is great if your sump pump isn’t running constantly. It also can deliver high discharge currents safely, which is beneficial if your pump occasionally demands a quick burst of power.

The battery has a solid cycle life, meaning it can be recharged and used many times before performance drops noticeably, although actual longevity depends on usage patterns and environmental conditions. It performs well across a wide temperature range, including below freezing, which is important if your sump pump is in a cold basement or garage. One thing to watch is its weight—about 128 pounds—making it less easy to move or install without help. Also, the battery should be installed upright to avoid any issues, which might limit placement options.

This battery provides a dependable, low-maintenance power source ideal for sump pumps and similar uses, especially when robust capacity and good performance under varied conditions are required.

The Renogy Deep Cycle AGM 12 Volt 100Ah Battery is a solid choice for sump pump backup and other deep-cycle needs. Its 100 amp-hour capacity and 12-volt rating provide enough power to run sump pumps reliably during power outages. Being an AGM (Absorbed Glass Mat) type lead-acid battery, it offers maintenance-free operation and is safer chemically than some other battery types, meaning fewer worries about leaks or complex care. It also supports series and parallel connections if you need more power or voltage.

This battery stands out with a low self-discharge rate of about 3% per month, which means it holds its charge well when not in use—helpful if your sump pump backup sits idle for periods. Its upgraded electrolyte formula allows it to perform well across a wide temperature range, from -4°F up to 140°F (-20°C to 60°C). This makes it dependable in both cold basements and warmer environments. With a maximum discharge current of 1100 amps for short bursts, it can handle the power spikes sump pumps sometimes demand. The battery's size and weight (roughly 13 x 7 x 9 inches and 64 pounds) mean it’s somewhat heavy but manageable for installation in most sump pump setups.

AGM batteries generally have a shorter cycle life compared to lithium batteries, so while this battery is reliable, it may need replacement sooner if heavily used. Additionally, its weight might be a consideration if you need a more portable option. This Renogy AGM battery provides a dependable, maintenance-free option suited for sump pump backup, especially if you want a battery that performs well in varying temperatures and holds charge during standby periods. It balances good performance with safety and ease of use, though it’s heavier than some alternatives.

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.