I have just had two MPPT 450/100 (Firmware version v1.10) solar charges installed in my residential hybrid/solar system. They are synchronised via the CAN bus and the programmable relay of one is wired via the N.O. contact to a Selectronic SP Pro to signal it to go to Float.
The moment the MPPT is powered up the relay closes even though it's not in Float. I changed the configuration of the relay to Always Off but that makes no difference (to either MPPT).
This issue was raised on this forum back in Jul 19 2021 and answered by Victron as follows:
"This should be fixed in the 1.04 firmware version that is shipped with VictronConnect v5.42 or later."
My MPPTs are at v1.10 and still have a problem. Has this ever been resolved?