Hi all. I've been lurking here for a while but now that I have my system installed I have a real head scratcher that I can't figure out.
I've installed two MPP Solar 3048 units in parallel along with my new Lifepo4 16s 280ah 48v battery system. I had some trouble but I've got the battery charging off the generator (we're fully off grid) but my existing solar panels are not registering somehow.
I have 6 old Sharp panels rated 21.78Voc wired in series and I'm measuring 130-140Voc with my multi meter at one of the MPP units but the unit display says the PV input is intermittently 0V, 4V, or 38-41V. I moved the string over to the second MPP unit with the same results. I've gone through every setting on the MPP and I'm pulling my hair out trying to figure this out.
I have 12 new panels to install come spring time but that will require some construction for supporting the panels, so I need these working over this winter. Any help would be appreciated.
I've installed two MPP Solar 3048 units in parallel along with my new Lifepo4 16s 280ah 48v battery system. I had some trouble but I've got the battery charging off the generator (we're fully off grid) but my existing solar panels are not registering somehow.
I have 6 old Sharp panels rated 21.78Voc wired in series and I'm measuring 130-140Voc with my multi meter at one of the MPP units but the unit display says the PV input is intermittently 0V, 4V, or 38-41V. I moved the string over to the second MPP unit with the same results. I've gone through every setting on the MPP and I'm pulling my hair out trying to figure this out.
I have 12 new panels to install come spring time but that will require some construction for supporting the panels, so I need these working over this winter. Any help would be appreciated.