How to compare lithium batteries for boats?
High charge rate
Many boats have high output alternators so need to be matched to a battery with high continuous charge rates.
High discharge rate
Lots of boats have high current windlasses so you may need to choose a battery with high continuous discharge rates.
Reputable manufacturer
Choose one of the leading consumer battery manufacturers’ such as Eve, Gotion or Panasonic. If a company is selling good quality cells they will highlight the manufacturer.
Quality battery management system (BMS)
To ensure longevity of the battery, a high quality battery management system (BMS) makes sense.
Vibration proof
Boats are subject to shock and vibration so appropriate padding around the cells is important.
Water resistant
Being a damp environment, having a good level of water resistance is important.
Prismatic cells
Due to the vibration on boats, it is better to have just four prismatic cells rather than the solder connections between 256 cylindrical cells.
Choose smaller batteries
This allows you to break the batteries into banks so if there is a fault on one bank it can be turned off, allowing the remaining banks to power your boat.
