Rolls 220AH 12V battery

• Proven AGM (Absorbent Glass Mat) lead-acid chemistry
• 225 Ah nominal capacity at the 100-hour discharge rate
• Extremely low internal resistance: just 4 mΩ
• Maximum discharge current of 2,000 A for heavy surge loads
• Maintenance-free design — no water top-up required
• Spill-proof and non-hazardous for safe handling and shipping
• Robust case construction built for harsh off-grid environments
• Deep-cycle engineering for repeated discharge and recharge
• Manufactured by Rolls/Surrette, a name trusted in off-grid since 1935

As a traditional lead-acid battery, the S12-220AE does not include an onboard BMS. Instead, its electrical behaviour is stable, predictable, and well understood by every charge controller and inverter on the market — making it one of the easiest batteries to integrate, monitor, and service.

• Compatible with virtually every charge controller and inverter — no proprietary communication protocol required
• Voltage-based state-of-charge easily read by any standard solar charge controller
• Pairs well with shunt-based battery monitors (e.g., Victron BMV, Morningstar TS-RM) for precise capacity tracking
• Temperature sensing via external sensor at the charge controller or monitor
• No firmware updates, cloud dependencies, or app lock-in

Traditional Off-Grid Homes

The S12-220AE is a go-to for homes and lodges running on tried-and-tested lead-acid architecture, where simplicity and serviceability outweigh the higher upfront cost of lithium.

Backup and UPS Banks

Low internal resistance and a 2,000 A maximum discharge current make the S12-220AE well-suited to UPS and backup applications that see short, heavy surge loads.

Telecom and Remote Infrastructure

AGM’s proven long-term performance, wide operating-temperature tolerance, and global service availability make it a safe choice for unattended sites where reliability is non-negotiable.

Marine, RV, and Expedition Use

Spill-proof AGM construction allows installation in any orientation and tolerates vibration far better than flooded lead-acid, making this battery a strong fit for mobile applications.

Hybrid Lead-Acid + Lithium Systems

For installers building hybrid banks or retrofitting existing systems, the S12-220AE slots in alongside lithium modules as dependable, well-understood backup capacity.