When my converter is running all the lights are nice and bright. When the converter shuts down the lights start going dim in about one hour. Then the converter kicks back on and they go bright. I check the voltage in the batteries and they are 12.9 volts. These batteries are about 4 years old.
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John & Sherry
2012 Redwood RE
2004 Chevy 3500
Camphost
same problem.. turns out.. both batterys had a bad cell.. which in 9 months time.. fubbarred the inverter.. had to replace batterys and inverter.. went with an x-antra 3 stage.. best thing i did besides swapping all the lights to led