Using solar to charge/ carry loads I wouldn't want to shut the power off going to the batteries.
Using it as a day to day power source, its a different story. Set the solar controllers float voltage so it covers the loads, but are putting in essentially zero amps.
This way you are not throwing away your excess solar. I've been reading for years posters saying you need to charge to full and then turn off your charge sources.
Turning off your solar would be crazy as you would be throwing away good power and unnecessarily cycling the batteries.
This works for me as a fulltimer boondocking all the time cycling the batteries everyday. For most folks that use their trailers for a few months or plugin more than boondock/ dry camp using a one size fits all charging source maybe floating will stress the cells in the battery so under those circumstances floating is bad.