Hello. I have an issue with my current MPPT controller (not victron), and I would like to switch back to a victron charge controller, as I had great success with it before. The problem is, that my solar array is too big for a single or even two 150v30a mppt controllers to handle (too many volts). The total solar array voltage exceeds the 300volts slighly.
My question is, how can I line up 3x 150v30a victron mppt’s to charge a single 24v 200ah lifepo4 battery? I know it is possible, but I am unsure as I have never done it before. I don’t want to disconnect my solar panels, I want the controllers to work with the current system array that I have, which is wired in series.
I have exhausted myself with my current MPPT. I just want to switch back to Victron. Could really use the help in wiring this, or hearing your opinion. Thanks a lot.
Connecting multiple MPPT (from Victron) in series on the PV side or the battery side is not possible or allowed.
You need to rewire your PV array to get the Voc below 250V.
Sorry for the confusion, I am still not bright on this subject, I meant to say parallel, could you provide information or a diagram as to how I should connect the three controllers to a single solar array? Big thanks.
Ludo, could you explain as to how to wire the controllers together to charge a single battery, I assume I would need 1 solar array wire to connect to a three head mc4 connector, correct? Thank you.
The 2 wires on the pv-side can be connected to an array of panels that must be in the specifications for the controller as described in the manual or MPPT Calculator - Victron Energy
The 2 wires on the battery side can be connected in parallel, ie all plus connected to battery plus busbar, all minus connected to ground.
I can’t say I fully understood what you meant, no disrespect. I suppose I just don’t understand how do I have to stretch the one pv cable to three different controllers? I made an illustration of connecting pv cables to 3x controllers, would this work? I didn’t understand the 2nd part with busbars.
