Jayco 2008 Octane

[bill810]

I have an electrical issue . When I am hooked to shore power my battery doesnt charge. It is brand new (not the battery ). When I am hooked to shore power every everything works but oven and microwave (seperate issue )then as battery discharges cause its not being charged then eventually AC, lights go dim, fridge shuts off, hot water shuts off even though they are running on LP, and finally lp detector detector goes into cardiac arrest. I have checked and double checked all fuses that I can find. I bought another battery and hooked it up and a few hours later same thing happens sooooooo is my convertor faulty? I would love to hear from anyone who has any thoughts cause I am at my wits end ! thank you