smkettner wrote:
The lower absorption voltage will conserve water. 2 batteries, 2 yrs, 1 gallon seems like a lot of water. Another reason to cut absorption time to a minimum (5 to 30 minutes) while keeping the modulation % low (20% - 10%). In storage this will be reached quickly, while in use the time will be extended significantly before you move to float.
Also consider going 90 days and just 60 minutes on the equalize. I would also consider 14.8 - 15.0 volts range as I believe 15.3 is at the very max the fridge is supposed to tolerate.
Mine is set 14.9 and just manual operation.
Thanks for the advice. I'm a little confused regarding "Another reason to cut absorption time to a minimum (5 to 30 minutes) while keeping the modulation % low (20% - 10%)." I believe I've read that the MPPT programming is not identical to the PWM one. For instance, I cannot simply enter an absorption time or duty cycle. I can only set an absorption setpoint and tell it to transfer to float when the system is less than a certain duty cycle threshold for a certain length of time. Default is 1 hour at less than 30% duty cycle. I can change the time and the duty cycle threshold, but it is not equivalent to setting an absorption time or specific fixed duty cycle.
Also, since I've decided to use a HVD on the controller at 14.4V, I think this means I basically can't do an equalization at anything above that voltage level. So I'll have to set up a new controller parameter file and reprogram things when I want to do the equalization. I have submitted a tech support request to Morningstar to confirm/refute my theory that the equalization setpoint cannot be higher than the HVD setpoint. KJINTF has chimed in and said that this would be the case as well.
