MPP about to quit working?


Solar Addict
Mar 14, 2020

I have two MPP PIP 3048LV-MK 48V 3kW units in parallel. I bought them at different times as the first one has no filters on the vents, but the second one does.

Just lately I've noticed that all my ceiling fans are now starting to drone, they were always silent in the past, and listening to the second MPP unit I bought, there is a distinct 60 cycle hum.

Unfortunately that unit arrived with the fan not working because it was blocked by the thin shield that had been damaged by loose components.

Anyone else had this problem and is it circling the drain. Not something I want as the real heat of the summer is upon us here in New Mexico.