Hey all,
Looking for some advice for using a "BlueSolar Charger MPPT 150/60" and a "MultiPlus Compact 12/1600/70" together in regard to charging.
I have the multiplus, a smart shunt, gx cerbo and the bluesolar MPPT all visible in VRM.
Both chargers work, however the issue is that they see slightly different voltages and so don't sync the charge stages properly. I kind of corrected this by decreasing the absoption and float settings of the MPPT and this helped, they both went into absorption a few minutes apart, great!
However, after about 2 hours the MPPT then went into float, but the multiplus stayed in absorption. Then the MPPT throttled back its charging watts until it was 0 and basically just stopped doing anything while the multiplus was still putting in its full amps in absorption stage. I'm guessing the MPPT saw the high voltage on the system from the muliplus charging and decided it was too high so stopping charging.
So, my question is, what can I do about this? I need the MPPT to keep charging as long as there is sun and the battery needs it, if the muliplus was the one scaling back i would be fine with that but how can I control which one floats first? what causes the chargers to decide they are done absorption and start floating?
Does the "tail current" setting have anything to do with that in the MPPT settings victron connect app? I don't see this setting for the multiplus in the VE config windows app.
Cheers for any help