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When you see both the ‘overload’ and ‘low battery’ LEDs blinking simultaneously on your MultiPlus-II 230V, it indicates a high ripple voltage on the battery terminals.
Ripple voltage in Victron inverters refers to the small AC voltage fluctuations superimposed on the DC battery voltage. These fluctuations are caused by the switching nature of the inverter’s electronics as it converts DC power to AC power.
This is a bit different from the usual overload or low battery issues. Here’s what you can do:
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Check your battery connections. Loose or corroded connections can sometimes cause ripple voltage issues.
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Inspect the battery health. If your batteries are aging or damaged, they might not be smoothing out the charge as effectively as they should, leading to higher ripple voltages.
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If you have a multimeter, you can measure the ripple voltage yourself. Compare the readings with the acceptable range in the MultiPlus-II manual.
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Reduce the load on the inverter and charger to see if it helps lower the ripple voltage.
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If you’re using multiple charging sources (like solar along with a generator), try isolating them to see if one is contributing more to the issue.
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If you have the capability, check the settings of your battery charger. Sometimes adjusting the charge rate can help reduce ripple voltage.
Ripple voltage issues can be a bit technical to diagnose and fix, so if these steps don’t clear up the problem, it might be best to get in touch with a professional or the support team from Victron. They can provide more detailed guidance based on your specific setup.
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