Inverter will come on with Battery 2 only

[Kevin4404]

I have a Zion SRT and the inverter will only come on with battery 2, not battery 1. Does anyone know why, and how to fix?

 

[rvkev]

Battery one needs water?

Battery one has a short?
Poor connection on number one?
Fusible link is blown out on number one?
Terminals are backwards on number one?
Check the voltage in number one, while isolated from number two.

 

[Greg and Mary Brannon]

Age and type(s) of batteries 1 and 2? Previous operational history? Were there any recent changes in the connections from the batteries to the inverter or in the batteries?

I'm not familiar with the Zion SRT 12V system or why/how one battery (bank?) or another would be connected to the inverter, but if that's relevant, please describe the system and its operation.

Greg.