Lithium batteries for marine use

My boat has Lithium batteries. Must I replace them?

If you have Lithium batteries powering your thrusters, the best advice we can give you is to check the actual voltage measured on the thrusters during operation.

Sleipner thrusters are designed to operate within a specific voltage range, and as long as you are within these boundaries, it doesn’t matter for the thruster if the current is delivered by this or that battery pack.

It may also be a very good idea to check the actual current drawn from the battery during full power at the thruster to see that you are not at the limit for the BMS to avoid sudden loss of maneuverability if the BMS disconnects the battery.

With installations where the battery pack is far from the thruster, the higher voltage delivered by LiFePO4 or similar batteries might not be a problem as you will experience a voltage drop through the long cables.

Always make sure you measure your voltage on the thruster to avoid the risk of early thruster wear.

Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.