Salt, Corrosion and Vibration in Marine Lithium Installations
Design a boat lithium battery system for salt air, vibration, wet lockers, cable corrosion and real marine conditions.
A boat adds salt aerosol, condensation, vibration, slamming, humidity, limited ventilation, difficult access, long cable runs and occasional flooding risk.
Look beyond the battery case
Assess:
- battery enclosure
- terminals
- hardware
- cable lugs
- busbars
- fuses
- fuse holders
- battery switch
- shunt
- communication connectors
- charger enclosure
- inverter enclosure
- MPPT controller
- glands and penetrations
A sealed battery connected to corroding exposed busbars is not a sealed system.
Inspection routine
Look for green or white corrosion products, heat discolouration, loose lugs, damaged heat-shrink, moisture tracks, cracked cable supports, chafing, unsecured batteries, salt deposits and overheated fuse holders.
Make the installation verifiable
A credible marine installation should be inspectable, documented and recoverable after a protection event. The battery label alone cannot show whether fault current, isolation, charging control, mounting and essential services have been addressed.
- Document cable sizes, protection ratings, isolation points, charging settings and BMS warning or shutdown logic.
- Confirm that terminals are protected, equipment is restrained and the location is suitable for heat, water and service access.
- Have the completed system commissioned and retain the drawings, settings, test results and equipment manuals aboard.