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I think I figured out my own problem. ??? The battery was close to full the first time I put the charger on it and because the cells were out of balance coupled with the fact that the off load voltage was too conservative, I was getting this large fluctuation. I increased the charger off load voltage to 195VDC and now it is much more stable. When it reaches the top of the battery charge there are some smaller fluctuations but continuing the balance charge it stabilizes and I think I'm getting the right results.
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