Does the Charger have a grounded plug? Do the other items that you have tried have grounded plugs?
Very good question...the items I tried were non-grounded. With that said, I was able to look at this a little more today and tested the following:
1. With the charger disconnected I tested all AC outlets in the trailer with a outlet tester and all test good. I also ran a drill with grounded plug off all outlets and nothing tripped. AC side looks good as far as I can tell.
2. The trailer is only 6 months old so the above is not surprising since we have not had any other power issues to date.
3. Every outlet in the trailer is GFCI protected so no opportunity yet to test on a non-GFCI outlet in the trailer. I will need to hardwire or add non-protected outlet for this off an available breaker slot.
4. I ran the shore power chord to a non-GFCI outlet inside my house and the trailer GFCI outlet still tripped.
5. I disconnected the charger from the batteries and plugged into trailer GFCI outlet and nothing tripped. Not surprising since there was no power draw but wanted to rule out a short in the charger or power cable.
6. The GFCI outlet takes a good 30 seconds before tripping. Before the GFCI trips the charger is working and sending 14.6V.
7. Prior to the install I bench tested the charger and battery and everything was good.
8. If I power the charger direct off an extension chord to my house nothing trips.
Still at a loss as to what the issue is so appreciate any feedback. This forum has been awesome and I am thankful for all help to date.