Golden, my little solar maintainer is wired directly to the battery's. Battery cut off is in the pos cable & is off so NOTHING is drawing. I only need it to keep them fresh while it is stored. I do not need the power for anything else. So far everytime I get ready to leave they are @ 12.8 or so. I simple asked a question about the nighttime. I have heard that some controllers will draw from the battery's @ night. I wasn't sure about that but it seems that I am only losing surface charge. Thanks for the reply.