Whether you have an engine-driven or battery-powered home generator, battery maintenance is vital to ensure your generator starts and provides power correctly.

How to check your generator battery using a load tester

  1. Disconnect the battery from the generator, remove cables and clean the battery terminals. Take a voltage reading for reference.
  2. Attempt to charge the battery with a 12-volt battery charger. Wait until the battery is fully charged, as indicated by the charger.
  3. Wait 30 minutes and take a second voltage reading.
  4. Wait 12 hours, do not load the battery during this time. After 12 hours take another voltage reading.
  5. Finally, reconnect the battery to the generator and take a reading while you start the generator. If the voltage reading drops significantly, below 9.6 volts, you may have a bad battery.

You can also use a load tester in step 5. This will provide a constant load, which will give you a more accurate assessment of the battery’s status.

We can test your battery if you bring it to our warehouse at 1 Marsh Lane, Devonshire. Contact us for more information.