Dead battery this morning ? WTF ?

[fourfourto]

The H3 sat from friday 8pm till today monday at 11 am battery was dead?. I did wash it on saturday and water froze up after wash(had to get rid of the salt from the roads).After I put on charger (15 minutes)It started . the drivers window didnt work the locks would only work the drivers door and the on off switch on the door didnt do nothing.also auto start didnt work after shutting off and restarting.Checked fuses all ok. I did brake a clip on the plastic removing cover(cold).Ran it for 15 to 20 minutes everything is working properly now.

I called hummer and made an appointment for tuesday 2/28 At that time I was getting a oil change,tire rotation , inspect the rear washer pump,and install passanger side roof plastic( I ordered last oil change)They said if I have a problem with the new one in march /april they will install complete updated rails on both sides.Also on tuesday the will check battery/ system.Also said if it dont start tommorow morning bring it in.Also they said they would have to look at fuse cover as it might not be covered under warranty.If it starts up over the next few days Ill wait till tuesday.Im going on a road trip upstate on thursday and wont be back till sunday (hopfully I get some good pics in)I guess if I have a problem upstate I will call onstar.

Any ideas why battery went dead. The eclipse system and remote start were installed 2 months ago and It has sat for 2 or 3 days in that time
also its been longer on my airhorn set up about 4 months and a month with the 12 volt fridge,that I used a relay for and shuts off with the key using a Rap circut.Nothing seems to be on or running with the H3 off.