Victron Energy 12V 265Ah GEL Deep Cycle Battery (M8 Terminals)

The Victron Energy 12V 265Ah GEL Deep Cycle Battery is a large-capacity sealed lead-acid battery designed for solar energy storage, off-grid systems and marine or vehicle applications. It uses GEL electrolyte technology, making it maintenance-free and suitable for installations where ventilation is limited. The M8 threaded insert terminals provide a secure, vibration-resistant connection suited to professional installations.

Key Features

• 265Ah capacity at 12V nominal voltage, suitable for high-demand off-grid and backup power applications.
• GEL electrolyte construction: sealed, maintenance-free and spill-proof, with no need for water topping.
• M8 threaded insert terminals provide a firm, reliable bolted connection and resist loosening under vibration.
• Deep cycle design supports repeated charge and discharge cycles, making it appropriate for daily solar cycling.
• Sealed construction allows installation in enclosed spaces where vented (flooded) batteries would not be permitted.
• Manufactured by Victron Energy, with consistent quality control across the range.

Product Overview

GEL batteries immobilise the electrolyte in a silica-based gel, which eliminates the risk of acid spill and significantly reduces gassing during normal operation. This makes them a practical choice for installations inside caravans, boats, battery enclosures and off-grid cabins where a flooded battery would require dedicated venting. Compared to AGM batteries of similar capacity, GEL batteries generally tolerate slower, deeper discharges better, though they are more sensitive to high charge voltages. Correct charger settings are essential: use a charger or inverter-charger with a dedicated GEL charge profile.

At 265Ah, this battery provides substantial usable capacity. In a 12V system, assuming a 50% depth of discharge (a conservative figure that extends cycle life), you have approximately 1.59kWh of usable energy per battery. Multiple units can be connected in parallel to increase capacity, or in series pairs to build a 24V bank. At 73.1kg, this is a heavy unit and will require two people or mechanical assistance to position safely during installation.

Victron's GEL Deep Cycle range is designed to work with the full Victron ecosystem, including MPPT solar charge controllers, MultiPlus and Quattro inverter-chargers, and the Venus GX monitoring platform. Ensure any charge source is configured to the correct GEL voltage parameters before commissioning.

Specifications

• SKU: BAT412126101
• Nominal Voltage: 12V
• Capacity: 265Ah
• Battery Type: GEL Deep Cycle
• Terminal Type: M8 threaded insert
• Weight: 73.1kg
• GTIN: 8719076039587

Applications

• Off-grid solar energy storage in cabins, outbuildings and remote installations.
• Marine house battery banks where sealed, spill-proof construction is required.
• Motorhome and caravan leisure battery systems.
• UPS and backup power systems in commercial or industrial settings.
• Telecoms and remote monitoring equipment with regular deep discharge cycles.

What Is Included

• 1 x Victron Energy 12V 265Ah GEL Deep Cycle Battery (M8 terminals)

Installation Notes

At 73.1kg, this battery must be handled with appropriate lifting equipment or by at least two people. Install on a surface rated to support the weight. Use correctly rated M8 bolts and cable lugs; do not overtighten terminals. Configure all charge sources (solar charge controllers, inverter-chargers, alternator regulators) to a GEL-specific charge profile before connecting. GEL batteries can be damaged by charge voltages set for AGM or flooded profiles. Battery installation in solar PV and off-grid systems should be carried out by a qualified electrician or MCS-accredited installer. Ensure the installation complies with BS 7671 wiring regulations and any applicable building or marine standards.