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Old 09-14-2018, 12:39 AM   #1
Zach
Junior Member
 
Brand: Thor Motor Coach
State: Kansas
Posts: 6
THOR #13085
Onan 4KY generator charging issues?

I have a 2007 Four Winds Majestic 28A with Onan 4KYFA26100K.

When I start the chassis engine, the voltage taken off the House Battery is 13.6 - 13.8v. But when I start my generator the voltage is around 12.7 - 12.9v. After shutting the gen down and letting the voltage settle it seems to settle at 12.5v. I ran all the test on the converter in the coach and I get up to 13.3vdc and a good 120vac. Why am I not getting power to the battery at 13.3v? I am so confused. I recently replaced the Onan control board and it seems to be working fine. I have a Duracell AGM 100ah battery that is less than 3 mos old.

Any ideas where to troubleshoot? Surely this isn’t normal. Right?
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