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Upgrading a boat’s electrical system from lead-acid to lithium-ion phosphate batteries requires careful planning of energy needs and component compatibility. The crew of the vessel Sunday replaced 540 amp hours of lead-acid batteries with 400 amp hours of Renogy smart lithium-ion phosphate batteries, increasing usable capacity from 270 amp hours to 360 amp hours.1:41 The installation includes a 3,000-watt Renogy inverter charger, two 40-amp MPPT solar charge controllers, and a 50-amp DC-to-DC charger.3:05 The DC-to-DC charger prevents the lithium bank from drawing excessive current and damaging the engine alternator.7:56 Solar input comes from four 160-watt panels mounted on the bimini, wired in parallel pairs.6:02 The system uses 3-oct cables for high-current connections and 100-amp terminal fuses for safety.4:57 A communication hub and Bluetooth module allow for real-time monitoring via the Renogy app.9:46 Separating the inverter-powered AC circuits from the main shore-power circuit allows for independent operation of high-draw appliances like induction cooktops and microwaves.8:41

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