Solar Charging Seasons
My Conext SW4024 is acting differently as the seasons change so I would like to get some opinions as to if it is normal. In my part of the country we have 4 - 5 hours less solar now (Fall/Winter) on a normal day than we had in the Summer. During the day my AGM battery bank charged by solar array is showing high 28's voltage, normal for all seasons. When the sun goes down the voltage drops to the mid to high 25's, same all seasons. During the Summer the SW4024 would rarely go into the charge cycle but now it seems to cycle more. It seems the batteries are not getting enough charge during the day and the load of the Sunfrost RF-16 is dropping the voltage to 25 volt set point to trigger charging at night. When this happens the SCP shows Bulk for about 10 minutes then Absorption for 10 or 20 minutes then Float for a few minutes then AC Support until it drops to 26 volts then AC In Good where it stays until it hits the 25 volts and the cycle repeats. The time between the 26 dropping to 25 is variable depending on how much the RF-16 runs, the two compressors on it pull 7.5 amps each on start up.
Why would the charge cycle; Bulk, Absorption, Float, be so short if the batteries need charging?