depends on what you mean by 'toggle switch ON'... is that 'up' or is that 'down'?
being 'plugged in' also only means that 120v power is available at your coach's ATS(automatic switch box) to your Breaker panel.
IF, and I mean IF, your Charger/Converter is ON, then your HOUSE batteries should be trickle charged.
IF, you have a bi-directional relay, or similar device, you MAY also have trickle charging to the CHASSIS battery, but all RVs don't necessarily have that, and many times is not necessary since there is little to no draw on the Chassis battery while sitting.
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada - Hiawassee, GA! (also, '14 Gulfstream Amerilite and '07 ForestRiver Rockwood) : )