I just couldn’t resist checking the parasitic draw on my 2022 Reflection 303RLS after reading through this post. I did install a full disconnect (on the positive side) and a solar disconnect, and also left the original battery disconnect in place. I have a Renogy battery monitor with shunt connected to the negative side. When I turn the solar disconnect off and leave both battery disconnects on, there is a constant amperage draw of just over 1A - refrigerator is completely off. This draw is coming from the control systems for water heater (I intentionally left the switch on the water heater on), HVAC, USB charging ports, stove, radio, One Control system (specifically the One Control touch panel - OCTP), and the largest draw from the LP detector.
When I disconnect the factory battery disconnect (solar still off), the draw is .51A - most definitely enough to kill a 100ah lead acid battery in a few weeks (if not sooner).
The One Control touch panel stays energized when the factory disconnect is turned off for a couple of reasons, but primarily (in my opinion) because of the Schwintek slides. Edit: Sorry, this was a false statement. I just tested the voltage on my Schwintek control unit and it is NOT powered when the battery disconnect is off. Since the OCTP also controls the auto leveling system through a separate control unit, it is true that the leveling system will also add to the parasitic draw, but like
@huntr70 said, only minimally. The largest draw should be your LP detector, if your refrigerator is completely off.