I'm trying to find a suitable DIY controller for my solar slowpump (Dankoff 1322-12) so that I don't have to control it manually. I've devised a relay circuit to turn it off and on but I need two IC type circuits to operate the relays to shut the pump off at 11.5V and not allow it to turn back on until 14.4V (after full battery recharge). I can buy one from NewMar (LVD 12-30) for $165. but would like to put it together at a lower cost if possible. I've seen some circuits in other areas of this site but they seem to be limited to less than 10V.