Battery bank discharges, no loads applied
I have a weird problem, battery bank of eight 6 volt deep cycles, wired for 24 volts (two banks of four each). New TS-60 charge controller, and four BP-185 panels, 24 volts. When the sun starts to go down, the state of charge indicated on the controller starts to drop, and after dark, it is showing discharge, but there is nothing turned on and no load applied to the battery bank. Today, I soldered new blocking diodes in the positive leads at the panels, suspecting a bad diode in a panel (and of course, the BP panels are made so one cannot replace the diode). No difference. The sun is going down and I'm losing battery voltage. Also, the controller will not go into the equalization mode. Can anybody offer any tips or advice? I'm at my wit's end. Thanks !!
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