Do you know how much current is going to the batteries when this happens? Sounds to me that you might be exceeding the rating of the ginny. :@ Is anything else running when this happens, water heater on electric, refrigerator on auto will run on electric when the ginny is running?
Papa Bob
1* 2008 Brookside by Sunnybrook 32'
1* 2002 F250 Super Duty 7.3L PSD
Husky 16K hitch, Tekonsha P3,
Firestone Ride Rite Air Springs, Trailair Equa-Flex, Champion C46540
"A bad day camping is better than a good day at work!"