AGM Battery Charging THE PRIME DIRECTIVE
I have gotten several communications about AGM battery maintenance. Using solar voltaic charging. The big error I read is that the subject of total and complete recharging is not mentioned. And tha...
Forum Discussion
brulaz wrote:
WRT the Magnum inverter/charger and BMK+shunt:
Apparently Magnum's MPPT solar charger can be networked in along with the BMK+shunt and ARC (advanced remote control). It can be controlled by the ARC and inverter/charger settings so the BMK's estimate of battery SOC can be used to terminate absorb from solar charging as well as from shorepower charging.
But if instead you use a NON-Magnum, NON-networked solar charger, things might go awry with the Magnum's logic?
Pretty complicated networked system:
The PT-100 has nice integration to be sure, I would have gone with it except that it won't use panels below 24V on a 12V system. I have 12V (20 VOC) panels in parallel and didn't want to go to series yet, so I went with a Tristar MPPT 60 which has no issue.
Works ok with two independent systems, they basically communicate with voltage, have the solar set slightly higher for charge settings so it tends to be dominant but when batteries are down both go into bulk and both contribute.
The Magnum network is actually not that complicated, just a RS-485 bus with the inverter as master sending it state at 10hz, the remote sends its config right after, then BMK and AGS at 1hz, not sure about PT-100 probably similar to BMK. I have written some software to display the info on a web page using a $5 USB dongle and a Raspberry pi. I also show my Tristar info on the same page as it has ethernet and does modbus.
