Hello,
My combo of the Wattstunde WS120SF and the MPPT 75/15 used to work just fine but since the firmware update to v.1.64 on the MPPT, I don't get enough V from the panel anymore to initiate tye bulk charge. No idea right now, as I did not change any settings or anything with the setup. Something has obviously changed with the new firmware. Would love to downgrade buy no idea how as the app doesn't allow.
I see minor changes with the incoming V from the panel but all below 1V even when exposed to pure sunlight mid-day.
Thank you for any help
