12V/165Ah AGM slow-cycle battery

This battery uses AGM (Absorbent Glass Mat) technology with flat plates. This design is known for its ability to withstand deep discharge cycles and offers good resistance to vibrations.

The battery has a nominal voltage of 12V and a capacity of 165Ah, measured at C20 (20-hour discharge).

The dimensions of this battery are 485 x 172 x 240 mm (Length x Width x Depth). Its weight is 47 kg.

This battery is fitted with M8-type copper terminal posts, ensuring good electrical conductivity and a secure connection for high-gauge cables.

The Batterysafe function is a technology integrated by Victron Energy to extend battery life. It slows the rise in charging voltage when the gassing threshold is reached, bringing internal pressure back to a safe level and preventing excessive gassing.

In floating (continuous float charge) use, the nominal lifespan of this AGM battery is estimated between 7 and 10 years at an ambient temperature of 20°C.

In cycling mode, this battery can reach approximately 1,500 cycles at an 80% depth of discharge, making it suitable for applications requiring regular and deep discharges.

The effective capacity of the battery decreases when discharges are faster and at higher currents. For example, constant-power loads such as inverters can accelerate this capacity reduction compared to the nominal C20 capacity.

For normal cycle use, recommended charging voltages are:

Absorption: 14.2 - 14.6 VFloat (maintenance): 13.5 - 13.8 VStandby (storage): 13.2 - 13.5 V

For fast charging, recommended charge voltages are:

Absorption: 14.6 - 14.9 VFloat (maintenance): 13.5 - 13.8 VStorage (standby): 13.2 - 13.5 V

To maintain the battery in floating mode (maintenance), the recommended charging voltage is 13.5 - 13.8 V. The standby voltage (storage) is 13.2 - 13.5 V.

Temperature compensation is required to optimize charging. For a 12V battery, a compensation of -24 mV/°C is applied, with a standard compensation point at 25°C. This adjusts the charging voltage to ambient conditions and prevents overcharging or undercharging.

Yes, it is crucial to strictly adhere to the charge voltage recommendations from Victron Energy. This optimizes battery lifespan, ensures maximum performance, and prevents damage from overcharging or undercharging.

AGM batteries are generally considered maintenance-free, meaning they do not require water topping. However, it is essential to ensure that the recommended charging voltages are correctly applied to guarantee their performance and longevity. Periodic checks of the connections (M8 terminals) are also recommended to ensure they are clean and properly tightened.

Yes, this Victron Energy AGM 12V/165Ah battery is specifically designed for marine applications. It is ideal for powering onboard equipment, house loads, or as a charging battery, thanks to its ability to support deep discharge cycles.

No, this battery is a deep-cycle battery designed for service and powering onboard equipment requiring deep discharge cycles. It is not optimized to provide the high, instantaneous starting current required by an engine.

This battery is compatible with chargers designed for 12V AGM technology. The charger must be able to apply the charging voltages recommended by Victron Energy for absorption, float, and storage modes, including temperature compensation.

Yes, this battery can be used with a power inverter to power AC devices. However, it is important to note that the effective capacity of the battery decreases more rapidly with constant-power, high-current loads, such as inverters. It is therefore advisable to size the battery bank correctly relative to the expected consumption.

Yes, as a deep-cycle battery designed for deep discharges, it is suitable for energy storage in an off-grid solar system. It can store energy generated by solar panels to power equipment when sunlight is unavailable, provided a compatible AGM charge controller is used with the recommended voltages.

Although the documentation mentions temperature compensation for charging centered around 25°C, Victron Energy AGM batteries are designed to operate efficiently across a wide temperature range. However, to optimize lifespan and performance, it is recommended to keep the battery in a temperate environment, ideally around 20-25°C. Extreme temperatures, whether very cold or very hot, can affect its capacity and longevity.