Battery Systems

A complete battery system is more than the batteries: it includes how they are charged, protected, isolated and monitored. This section brings together our battery products: marine batteries (LiFePO4 lithium and AGM), shore and DC-DC battery chargers, battery isolators and combiners, battery accessories such as BMS units, sensors and fused connectors, and complete battery kits for electric drives.

How to plan a marine battery system

• Capacity: size the house bank to daily use and days between charges.
• Chemistry: lithium or AGM, and make every charger compatible.
• Charging sources: shore charger, alternator (with DC-DC or regulator), solar and wind.
• Protection and monitoring: fuses, BMS and a shunt-based battery monitor.

Where should I start?

Read our battery guide, then browse marine batteries.

Can eMarine help design a battery bank?

Yes. Share your loads and charging sources and we will help size the system.

Lithium or AGM for a house bank?

Lithium offers more usable capacity, lighter weight and faster charging; AGM costs less and drops into older systems with fewer changes. Either way, every charging source must be set for the chosen chemistry.