The battery disconnect switch is intended only for long term storage to eliminate phantom drains on the battery.
I have no idea on the reason your fuses are blowing, though something is amiss. I seem to recall this happening before, and maybe someone else will have an idea.
Otherwise, an electrician, or even a good RV shop should be able to sleuth out the problem.
2017 Escape 5.0 TA
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
Most folks are about as happy as they make up their minds to be. Abraham Lincoln