No DC power

[Arizona Mike]

Hello All
I have a 2017 fuzion 371 th, I'm having a problem in the dc side of the power system. When I'm plugged into ac in my rv garage power system works fine. Disconnect the ac and I loose all dc circuits. Batteries went down while plugged into shore power. I charged up the batteries 4x 6v they read 13.6 v across the string and disconnect shore power same thing. I replaced the converter and have the same trouble. Give me your ideas thanks in advance

Mike

[FlyingAroundRV]

Hi Mike:

You could start by disconnecting the batteries from the rv and from each other and testing them individually. You might find that a cell has failed in one of the batteries. When a cell fails, you'll see the full charging voltage across the battery when the charger is active and when there is no load on the battery, but the battery has no ability to supply current.

[Arizona Mike]

Thanks Scott took all four battery's out had them tested at local battery shop there good. I just ran the genset and then disconnected shore power and the coach went dead again.

Mike

[chuckster57]

If you lost all DC in the trailer, first place I would look is the battery disconnect. After that, I would verify the reverse polarity fuses are good.

[Arizona Mike]

Thanks Chuck the battery disconnect is bad plus found a flaw in my battery system only two of the 4 are connected thru the disconnect. Thanks for the input

Mike