TBB's MEZZO is a digital switch and intellient electrical system for motorhome
1) Monitor how master power and other power module like TBB's inverter (if there is) is working
2) Monitor water tanks status
3) Monitor lithium battery (If it's TBB's M series)
4) Control system or DC loads remotely
It's a useful tool to help you manage and monitor electrical system on your RV.
Enjoy your fun with it.