I received a replacement SJ-30 controller from the manufacturer due to shutdown issues at low (25%-50%) settings. The shutdown at low settings has disappeared but I don't think it's generating as much as it should. In SuperCL (boost) mode, I'm only able to raise the level 1ppm over 12 hours at night. According to the pool calculator, that would be about 2oz of chlorine gas but the SJ-30 is rated for 12oz over that period. Reading though the forums, I'm seeing where cell voltages are usually upwards of 20v. I measured across the CellLeft and CellRight terminals inside the controller and at 75%, both the old and new controller are running at 5.3v. Could this be correct? I wanted to sanity-check my findings with the forum before calling the manufacturer again on Monday.