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Fault finding

House batteries discharging quickly

12/24V electrical system / Batteries

Leisure & YachtMedium difficulty

Symptoms

Low resting voltage, services shutting down, charger not completing the charge.

Probable causes

  • End-of-life or sulphated batteries
  • Parasitic loads
  • Charger/alternator badly regulated
  • Corroded connections

Solution

Test battery capacity and open-circuit voltage, measure the resting current draw, check the charger/alternator output and clean and tighten the connections. Replace exhausted batteries with a correctly sized bank.

The information on this page is general guidance. It does not replace the manufacturer’s manual or the work of a qualified technician: before any intervention, always check procedures, tightening torques and safety requirements in the official documentation of the machine.

Field experiences

No experience has been published for this fault yet. If you have dealt with it, tell us how you solved it: photos and drawings help whoever faces the same situation.

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