27DCs and SG Lag Problems
Here is what I mean. Got two rebuilt 27DCs from Interstate as "Econo Power" models, which means they are whatever brand and type they decided to renew and sell at under half price. So just right fo...
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I could not think of anything else I could risk banking with my sixes that are getting near their end that would not get ruined. So these 27s won't have to last a long time. It is too early to just toss the 6s and get all new. The cheap used 27s won't be a waste of money by getting ruined sooner than normal time.
One thing I can do is follow the above advice and take it easier on them where possible. I do have some solar with them, which helps keep cycles shallow when sunshine happens.
I also will put them as the "downstream" battery banked with the 6s where the load and charging wires are on the 6s. The two 27s in parallel go as a big 12 in parallel with the 6s, making two 12s of approx. 200AH each. But by making the 27s downstream they will not be worked as hard as the 6s-- in theory.
I will separate the 27s for special attention whenever possible after a trip, and also now use 16v as mentioned by LY above, instead of just the 15.7 the VEC1093 can do.
I suppose it would be better to just use the 27s and not measure them. I don't bother with my car battery and it lasts for a few years despite what it goes through. These 27s only have to last as long as the 6s do. They are at approx. 87% of rated SOC based on recent 10 hr testing. (194 or so out of 226. Exide 135s--excellent service from these since 2011)
One thing I can do is follow the above advice and take it easier on them where possible. I do have some solar with them, which helps keep cycles shallow when sunshine happens.
I also will put them as the "downstream" battery banked with the 6s where the load and charging wires are on the 6s. The two 27s in parallel go as a big 12 in parallel with the 6s, making two 12s of approx. 200AH each. But by making the 27s downstream they will not be worked as hard as the 6s-- in theory.
I will separate the 27s for special attention whenever possible after a trip, and also now use 16v as mentioned by LY above, instead of just the 15.7 the VEC1093 can do.
I suppose it would be better to just use the 27s and not measure them. I don't bother with my car battery and it lasts for a few years despite what it goes through. These 27s only have to last as long as the 6s do. They are at approx. 87% of rated SOC based on recent 10 hr testing. (194 or so out of 226. Exide 135s--excellent service from these since 2011)
