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We have installed a few systems that have Multiplus 2s ac coupled to enphase equipment off grid. This normally works great, however we have just done this ac coupling to another site recently, all set up the same, and the frequency shifting doesn't work, the system stays at 50hz, so the multiplus attempts to overcharge the 48v lithium batteries, so we have to turn off the ac coupled system. Any ideas on why this isn't working?
All sorted, updated the inverter firmware and it's working a treat
are you running ESS?
@PeterM is the assistant for frequency shifting also needed, if the ESS assistant is installed?
No, it is covered in the PV inverters section of the ESS Assistant:
You may have to experiment with the frequency settings. The defaults shown in my screenshot may not be appropriate, I had to change them for my Steca inverters as they are 12 years old. I see from the other thread that yours are different, did you check with the enphase manual for the right settings?
@sharpener can these settings be done with the Cerbo GX so not requiring MK3 VE config tool?
