Battery Draw down

[mgann]

Just replaced old with new group 31 rv battery. Nothing is switched on and LP monitor disconnected but something still drains my battery by 1 volt per day. Any help in resolving this is appreciated in advance.

[GordonThree]

Stick one of these in between the battery and your main positive cable. Suggest you leave the emergency breakaway switch direct to the battery.

https://www.westmarine.com/buy/blue-sea-systems--m-series-mini-single-circuit-on-off-battery-switch-...

[midnightsadie]

mines in the shop right now being traced .

[enblethen]

That is a good sized drain.
Start by locating your 12 volt DC power distribution panel. Remove each fuse watching closely for a small arc. Can also be scene where pushing fuse back in. The one with arc is the drain.
Next method is with ohm meter. Remove fuse, place one lead to ground and other on output terminal of fuse. With meter set on around 1000 scale look for resistance.