Cruising Mayavideo
Lithium Batteries on Boats: A Real World Example of a Lithium Battery Install
September 6, 2023 · 10 min · 6K views
What this video covers
A 40-foot 2018 Beneteau sailboat based in Anacortes, Washington, upgraded its house bank from three 80-amp-hour AGM batteries to three 75-amp-hour Battle Born lithium batteries to support increased power demands from Starlink.1:06 The installation replaced the existing internally regulated alternator with a Balmar MC-618 external voltage regulator to prevent alternator overheating during high-amperage lithium charging.3:18 To maintain charging for the boat's separate starter and bow thruster AGM banks, the system uses a DC-to-DC charger triggered by an ignition-switched relay.5:27 The primary shore power charger was repurposed for the lithium bank, while a new 15-amp multi-output charger handles the remaining AGM banks.6:16 A dump protection device provides a safeguard against alternator damage should the lithium battery management system (BMS) open unexpectedly.9:30 The owners report successful operation, including charging rates of 80 amp-hours per hour while underway.6:56 Proper configuration and adherence to ABYC standards are essential for safety and insurance compliance.7:23
Boats in this video
More from Cruising Maya
From Cruising Maya — see the channel’s boat, crew, and every analyzed video.
The Sailing Directory Newsletter
One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.