No power until generator is on

[Tj87]

I pulled the battery out and had it tested. it tested good. I went an put it in two weeks later and had no power. I found blown fuse under the tongue (30amp). I changed the fuse but still no power. The battery is good because the generator turns on, once the generator turns on everything will work. When I turn the generator of nothing will work. Checked all fuses and breakers not sure what the problem. I have a 2016 Jayco octane all advice is very appreciated.

 

[Grumpy]

I assume you are not connected to shore power.

There are one or two reverse polarity fuses for the battery feed at the converter, did you check those? Did you connect all the battery wires correctly?

 

[L & J]

Be sure battery is a Deep cycle marine type, had similar issue found to be a regular car battery.