Battery/electrical experts -- question on refrigerator

Thanks for the info... just went over to the storage lot and checked on the temps... it was cold, didn't have my thermometer, but seemed really good after 4 hrs. The refer/compressor wasn't running, so it must have reached it's target temps of 0 in the freezer and 38 in the refer section. So, in the future, I'll start it up a few hours before hand instead of a day ahead. The battery meter showed that battery voltage had dropped about .2v from where it started this morning.