Battery Disconnect Switch

The only time it's beneficial to turn it off is when you store the RV and dont have power available to keep the battery on charge. Otherwise the battery will go dead within a few days if left on from the radio, propane leak detector, etc. that draw from the 12v battery.

Assuming you have a TT or 5th Wheel, I see no reason to set it to disconnect while towing as the umbillical cord hooked to the truck will continue to charge the battery while your fridge is on.

Many RVs have devices that are "on" and drawing power if the battery is connected. Fore example, my RV has a propane/carbon monoxide detector that I installed hard-wired to the battery. So if the battery is connected, it is drawing power.

Likewise if you have a motorhome there are things that may draw power from the engine battery even when the vehicle is off.

These parasitic loads can drain a battery.

The solution is to use battery terminals to disconnect the battery when I put the RV in storage.

It is also somewhat of a theft deterrent, as the engine cannot start until you connect the battery.

Steve

It makes more sense to me to call it a connect switch. Therefore, when it's "off", it's disconnected.

I guess it's for storage.. dunno, never used one.

We always do when on the road, by default if I don't it will auto disconnected anyways. Don't think having power in the trailer is wise when moving. More chance for a unexpected problems I would expect....