Combining Solar, Alternator, Shore Power, Wind and Generator Charging
Coordinate solar, alternator, shore, wind, hydro and generator charging through a marine lithium BMS.
A cruising yacht may have five or six charging sources connected to one battery bank.
Every charge source needs an answer to the same questions:
- What voltage does it target?
- What current can it deliver?
- Does it follow a lithium profile?
- Can the BMS stop it?
- Does it respond to high battery temperature?
- Does it respond to low battery temperature?
- What happens if a cell reaches high voltage?
- Does it communicate with the battery?
- Can it continue safely if another charger is active?
Larger integrated systems can use networked control so the BMS defines charge permission and charging limits across the inverter-charger, solar, alternator and other sources.
Check the whole charging path
A charger setting is only one part of the result. On the boat, charging performance depends on the source, regulator, cable path, temperature, battery limits and what happens when the BMS asks the source to stop.
- Record sustained output after the alternator, controller or charger is hot—not only its nameplate rating.
- Verify voltage limits, temperature sensing and shutdown behaviour against the battery manufacturer’s instructions.
- Compare daily energy used with energy that can realistically be replaced in the available charging window.
Work out your own numbers
Alternator Charging CalculatorCalculate engine running time to recharge a lithium bank from an alternator, and the sustained output the alternator has to deliver to do it.Boat Solar Sizing CalculatorCalculate the solar array a boat needs to replace its daily energy use, with indicative peak-sun-hours for Australian cruising regions from Darwin to Hobart.
Related pages
Charging Marine Lithium Batteries from an AlternatorLearn how to charge a LiFePO4 house bank from a yacht engine alternator without overheating the alternator or losing BMS control.DC-DC Chargers for BoatsLearn when a DC-DC charger is useful for charging a lithium house bank from a boat alternator and starter battery.Shore Power Charging for Marine Lithium BatteriesUnderstand lithium shore charging, charger profiles, inverter-chargers, marina power and AC safety on Australian boats.Marine Inverter-Chargers and Lithium BatteriesChoose a boat inverter-charger by AC load, surge, DC current, charging current, shore power and battery BMS limits.Solar Panels for Marine Lithium BatteriesDesign yacht solar for LiFePO4 batteries with MPPT charging, shading, array size, daily kWh and Australian cruising conditions.MPPT Solar Controllers for BoatsLearn how to size MPPT controllers for marine lithium systems, including panel voltage, controller current, BMS integration and multiple arrays.