Summary

Power management can become a challenge as yachts add more electronics and solar charging. This project involved upgrading to high-capacity lithium batteries with an internal BMS and reworking the DC system to support safe, efficient operation.

The Work

Inspected the DC electrical system and confirmed isolation between engine start and house batteries
Shut down all charging sources, including five solar chargers, to ensure safe installation
Installed four 460Ah lithium batteries with internal BMS and secured them in place
Fabricated equal-length 2/0 cables for parallel battery connection using a distributor bus with individual fuses
Set up dedicated busbars for unswitched and charging circuits
Mounted Orion DC-DC chargers and a new fuse holder, then wired inputs and outputs with proper gauge wire

The Outcome

The yacht now benefits from a safer, more organized electrical setup. Power distribution is clearer and easier to maintain, and the new lithium batteries offer greater capacity and reliability for extended trips. This upgrade also supports future charging needs and helps protect vital systems on board.

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Lithium battery upgrade and DC system improvements for yacht

June, 2026 | San Diego

Project Overview

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