My Easysolar has not been charging the batteries correctly (48V 24xA600 OPzV system) for some time. After investigations, it turns out that the battery voltage recognized by the MPPT is very much above the real voltage (+6.5V approximately). The batteries are therefore never fully charged by the MPPT.
I checked the wiring (it's OK) and the voltages at the various terminals with a multimeter and I always find the same voltage as at the battery terminals as well as that indicated by the Multiplus, never that indicated by the MPPT.
I strongly suspect an internal failure of the MPPT but would like your opinion before replacing it.