angus99
Guru
We have a Magnum Energy MS 2812 inverter/charger, battery monitoring kit (shunt) and advanced remote control charging and monitoring our ~1,250 AH AGM housebank. Initially, this kept the bank at a 100% state of charge, according to the monitor. Over the past 3-4 weeks the SOC has been dropping and the charger has been going into it's "maintain" mode--basically a standby status as if the bank were at a 100% SOC.
Periodically, the charger enters the float stage for a few hours and then reverts to maintain/standby. While all this is happening, another meter on the remote monitor says the bank is consistently fully charged at 12.8 volts. We are using very little DC power; the boat is hooked to shore power and the bank's SOC -- as indicated by the remote monitor -- has been declining slowly but steadily--from 97% three weeks ago to 88% now. But still at 12.8 volts.
My question: why is the same monitor indicating a fully charged bank (at 12.8 volts) while telling me the SOC is 88% (and dropping)?
Magnum's techs think the absorb setting needs to be lengthened--or maybe the heat is suppressing the voltage the bank is able to absorb--but otherwise don't have a lot of insights into what's going on.
Has anyone with one of these units experienced this? Is SOC something I need to worry about if the bank's voltage is topped off?
Periodically, the charger enters the float stage for a few hours and then reverts to maintain/standby. While all this is happening, another meter on the remote monitor says the bank is consistently fully charged at 12.8 volts. We are using very little DC power; the boat is hooked to shore power and the bank's SOC -- as indicated by the remote monitor -- has been declining slowly but steadily--from 97% three weeks ago to 88% now. But still at 12.8 volts.
My question: why is the same monitor indicating a fully charged bank (at 12.8 volts) while telling me the SOC is 88% (and dropping)?
Magnum's techs think the absorb setting needs to be lengthened--or maybe the heat is suppressing the voltage the bank is able to absorb--but otherwise don't have a lot of insights into what's going on.
Has anyone with one of these units experienced this? Is SOC something I need to worry about if the bank's voltage is topped off?