We also leave our HWH on electric all the time. Having said that it has to be shut off while the convection/microwave oven operates. It works off a double throw switch (Micro-Off-Heater) in the kitchen area. I imagine they both share a breaker. It's never been a problem as the water stays hot for some time.
We FT so the 5'vr is our home.......
Everything is done the same way as we did in our S&B......ON
Water pump (when needed) is ON
Furnace/AC t-stat set to turn ON when needed
It's how we do it......your choice on how you want to do it.
There's no right or wrong in how one uses their rig for their needs.
2007 RAM 3500 QC LB SRW 5.9L CTD 48re 4:10 4K in bed 'quiet genny'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
Hit the Road Debt Free & Clear April '07
Came off the road still Debt Free & Clear Jan. '14