[Richard]

I understand about the separate battery monitor. I asked about the BMK add on for the Magnum because it allows you to do extra stuff with the Magnum.

I have no problem with CC/CV. You may be able to do a simple tweak to get better results.

I just looked at your setup parameters again, and I think I see the gremlin. You have the recharge voltage set at 13.4, and the float voltage set at 13.4. That means if the voltage dips to 13.39, the charge cycle will start kicking your voltage to 14.4. Since the normal resting voltage for the Lithium is between 13.2 and 13.4, setting the recharge voltage at 13.4 may be too high. Try this and see what happens, lower the recharge voltage to 13.1.



There is no need to keep Lithiums at 90% SOC when you are hooked up for long periods.