Mike, If you dont get what you need here, give Tommy Yetts a ring at Rockwall Marine 972.771.4442 He can help with any and all BC trolling motor set-up questions. Ive run a 36V MG TE81 with three batteries in my P-III since 01, no problems. I have a Trojan SCS225 for the cranker/troller/accessories, and two Trojan SCS200s for the other trollers. Had to jump my cranker only once in seven years, and that was when my original 3 yr old Continental crankin battery finally bit the dust.