Larry,
If you were plugged in to shore power with the house batteries being charged by the inverter, your chassis should have been charged by your Echo Charger assuming that you still have one. First locate the Echo Charger and check the indicator light on it. If the light is green and it is not charging the chassis batteries, you probably have a bad output fuse. If there is no light, the input fuse is bad or the Echo Charger could be bad, but 90% of the time it is just a bad fuse.
Gerald