Marine Batteries

Your battery bank is the heart of the electrical system on a boat or RV. This collection covers LiFePO4 lithium batteries from Victron (Smart LiFePO4, NG and Lithium SuperPack), Dakota Lithium (including DL+ dual-purpose starting models), RELiON (including cold-weather LT models), Epoch, MG Energy Systems, Battle Born, Renogy and Xantrex; AGM deep cycle and starting batteries from Lifeline, Victron and Power King; and Fortress energy storage for shore and off-grid systems, from 12V up to 72V.

How to choose a marine battery

• Chemistry: LiFePO4 is lighter and allows deeper discharge; AGM costs less up front and works with older charging systems.
• Capacity: size amp-hours to your daily consumption and the days between charges.
• Voltage and size: match system voltage and check group size or dimensions for the battery box.
• Charging: lithium needs compatible charge profiles on alternator, solar and shore chargers.

Lithium or AGM for a boat?

Lithium gives more usable capacity per pound and long cycle life; AGM is simpler to drop into an existing system. Our battery guide compares the tradeoffs.

Can I charge lithium from my alternator?

Yes, with a suitable regulator or a DC-DC charger. See battery chargers for Orion and Sterling battery-to-battery chargers.