You're operating up to 2V below the specified maximum power point of the panel. Therefore you're not operating at the max power point. It's extremely hard to believe that you're still getting 10% more current from this configuration. There might be something wrong with your pwm controller. Where's the data (panel I & V and battery I & V)?
Sal
HiTech wrote:
So I count the original as a fail, but the buck converter as a success. It is indeed a manual tracking MPPT device. I found my real Vmpp to be between Vmppspec and Vmppspec -2v.
Jim
