The setup is as follows.
280 amp hour lithium phosphate
1 - smart solar mppt 150/70, connected to 2 - 385 watt 48 volt panels
1 - 75/15 blue solar mppt connected to 200 watt 48 volt panel
1 - 100/15 smart solar mppt connected to a 200 watt 48 volt panel
and a overkill 120amp bms
I have manually set all controllers to 12 volts.
I disconnected all controllers by removing the negative wire to the battery. This was in attempt to figure out why the voltage stated on the mppt controllers display via the color control gx was saying max volt 16.1v. Upon disconnecting 2 solar controllers (150/70 and the 100/15 smartsolar) the voltage at the bms slowly went down to 13.5v. I tested the voltage at the output of the 150/70 and the 100/15 and the both said 16v. The charge algorithm is set to lithium phosphate and each device was factory reset in an attempt rectify the issue.
They have been disconnected now for 2 days. I will test again in a bit to see if anything has changed.
any idea what would cause a 16v charge. Equalization is turned off. Manually set to 12v on each mppt controller