ex TL systems 63 Posted August 7, 2018 Share Posted August 7, 2018 Just checking I’ve got this right I have 2 seperate batteries not suitable to permanently parallel as one deep cycle and one crank. But if I connect the 2 negatives together and then have a wire to connect the positives which I will only do if say the house is down but the crank which is only for the anchor winch is full and I want to transfer some of its amps across to the deep cycle house battery. Is that okay or is it better to not have the negatives permanently connected either. And just use jump leads to temporarily parallel them. Quote Link to post Share on other sites
chariot 243 Posted August 7, 2018 Share Posted August 7, 2018 Come in Wheels. All is forgiven. Quote Link to post Share on other sites
mattm 98 Posted August 7, 2018 Share Posted August 7, 2018 Connecting the negatives permanently is 100% fine. Power will only flow if you complete the circuit by linking the positives. Quote Link to post Share on other sites
ex TL systems 63 Posted August 7, 2018 Author Share Posted August 7, 2018 Thanks that’s what I thought Quote Link to post Share on other sites
Island Time 1,239 Posted August 8, 2018 Share Posted August 8, 2018 That is a standard multi bank install. The parallel switch goes in the positive side, and is only used if the start batts get flat, to parallel the two banks. Its a bad idea NOT to link the negatives. Quote Link to post Share on other sites
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