split the power

hi everyone, two of my small mills are on the end of the dock, one low and one high. the low one is at the same height as the high dive and would be a problem for swimmers. for these reasons it is removed for the summer from the pole. the other is at 21ft up and dosn,t  pose any problems. after removing the low mill the higher mill is rewired to dump from its main battery bank to the bank from the lower mill. the higher mills dump load is disconnected and the dump power now feeds the second battery bank, this helps to keep the batteries fresh and dosn,t waist any power to the dumps until both banks are up to charge, at that point the second bank will dump as allways. I only use my small system for l.e.d. lighting in the summer , this works vary well for my usage and duration used. this is a thought for anyone with the need to remove one of there mills for any reason, this also lowers the battery maintenance over the summer months on the second battery bank. food for thought.