October 9, 201510 yr I have noticed something really weird. The batteries that have the highest voltage in the battery bank differ depending whether the charging is solar or AC. Can anyone explain this?
October 10, 201510 yr Author Does the charging rate differ between solar and AC? Hi jhay. No they are the same 20A
October 10, 201510 yr Wild Guess. When charging from AC, the ripple current will be different, ie a small AC component might sneak through on the output and AC will have a different ripple frequency. A DC multimeter measures the "average", usually taking a number of samples per second and updating the display around two or three times a second for a lower-to-middle-class multimeter. So my guess would be that due to differing characteristics of the batteries they possible react differently to the ripple and produce a different "average" voltage.Sounds like the kind of thing I can attach my scope to... :-P
October 10, 201510 yr Author I know this from the battery balancers. They are Chinese "pass the parcel" that we have discussed before. Under solar they pass up the battery bank and on AC they pass down the battery bank - wierd. When I had my Zeners and was logging battery voltages they use to do the same thing.
October 11, 201510 yr Author The batteries are all at ambient temp I am not charging fast enough to cause the batteries to warm up.
October 11, 201510 yr Does all the charging take place at the same time. Night and day temp differs so does battery density with every 2degrees.
October 11, 201510 yr Author Hmm Regie that is something I never thought of. AC charging is invariably at night when the communal generator is on.
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