The OP states that after he went through a session of "clicking" and loss of power (probably due to a known bad battery), he replaced the battery with a new battery. He further states that he had power, initially, but lost 12V power in a short time. He now has no lights but the slide works.
My best guess is that the slide is connected to the battery before the inline breaker and that the inline 12V breaker has failed.
I don't think the OP is concerned about utility power quality or grid attributes, at the moment. He needs to get some of the 12V system operational.