Victron 12V 38Ah AGM Super Cycle Battery M5 | BAT412038081

The Victron Energy AGM Super Cycle battery is a deep-cycle lead-acid battery built for repeated, deep discharges. Rated at 12V and 38Ah, it suits compact off-grid systems, marine installations and mobile power setups where space and weight matter. M5 threaded insert terminals give a secure, vibration-resistant connection.

Key features

• Capacity, 12V nominal voltage with 38Ah capacity, suited to compact deep-cycle applications.
• Cycle tolerance, AGM Super Cycle technology tolerates deeper and more frequent discharge cycles than standard AGM batteries.
• Terminals, M5 threaded insert terminals give a firm mechanical connection that resists loosening under vibration.
• Construction, sealed, maintenance-free AGM with no free electrolyte, safe for enclosed spaces.
• Weight, 9kg, manageable for single-person installation in mobile or marine environments.
• Compatibility, works with Victron charge controllers, inverter-chargers and battery monitors.

Product overview

Standard AGM batteries have a limited number of deep discharge cycles before capacity drops off. The Super Cycle range uses a modified plate design and electrolyte formulation that allows repeated discharge to lower states of charge without the same rate of sulphation and plate damage. That makes the 38Ah Super Cycle a sensible choice where daily cycling is normal, such as campervans, narrowboats or small off-grid cabins.

The M5 threaded insert terminals matter to installers. Unlike bolt-on posts, threaded inserts allow a clean, torque-controlled connection that holds under vibration, reducing the risk of intermittent connections and terminal corrosion. The sealed AGM construction needs no topping up and the battery can be mounted in any orientation except inverted.

At 9kg it stays manageable in tight installation spaces. It pairs with the full range of Victron charging equipment, and Victron's Battery Protect and BMV monitors can track state of charge and guard against over-discharge in unattended systems.

Applications

• Campervans and motorhomes needing a compact, deep-cycle leisure battery.
• Narrowboats and small marine vessels with daily charge and discharge cycles.
• Small off-grid solar systems with regular overnight discharge.
• UPS and backup power installations with periodic deep discharge events.
• Mobile medical or telecoms equipment needing a sealed, maintenance-free battery.

What's in the box

• 1 x Victron Energy 12V 38Ah AGM Super Cycle Battery (M5 terminals)

Installation notes

This is a 12V battery suitable for installation by anyone competent with DC electrical systems. For integration into solar PV or inverter-charger setups, a qualified electrician or MCS-accredited installer is recommended. Set the charger profile to AGM or the specific Victron Super Cycle profile where available, since an incorrect charge voltage can reduce cycle life. The battery must not be mounted inverted, and the installation space needs adequate ventilation as AGM batteries can vent gas under fault conditions.