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Marine Battery Banks

Not every boat needs lithium, and a well-built lead-acid or AGM bank still runs a huge share of the fleet. This section is about getting the fundamentals right: sizing a house bank to your real loads, wiring batteries in series and parallel without creating imbalance, and keeping starting and house duties properly separated. We explain state of charge, depth of discharge, and why a cheap battery that lives at 50 percent will quit years early. You will also find maintenance routines, terminal care, and honest guidance on AGM versus gel versus flooded cells. Expect clear numbers, wiring guidance in plain words, and troubleshooting steps for the day your bank will not hold a charge. Build it once, build it right, and your electrical system stops being a mystery.

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