I have an MPPT 100/30 and after replacing one of the two paralleled batteries, my charger no longer reads watts. The voltage of the solar panels, but no ampere. In other words, something does not indicate whether the internal fuse has blown. Can it still be replaced?
I suspect that the internal fuse is broken, because the app also does not work even though it is also connected to battery power (12, 79v) What else can I do?