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On my blue solar 100 50, testing the pv wires when disconnected from the mppt shows 90v. When the pv wires are connected, testing with a multimeter on the screw terminals reads 14v. I’m quite sure the panels and wiring are not at fault as I’ve tested them through a different MPPT…
any advise anyone?
I would think you have a high resistance connection between the mppt and array.
Measure for voltage drop across every join/fuse/breaker.
