I'm not sure what your exact problem is? Do you not have any power to your coach when you are just on battery? The battery relay is built to not open when on just battery power. It will only open when you are on generator or shore power or when the engine is running. So when on just battery power, the voltage on the terminal leading to the power converter should read 0v. That is normal. If the coach battery reads 12.6v and you have no 12v power in the coach, it may be that you have a bad store/use switch or a bad circuit breaker. I would check those two first. The battery relay should not make that happen. I have an Axis and my pieces are different, but they should work similarily.
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