After the last firmware update my mppts stopped delivering any current to my batteries, even though the PV voltage was above 21v and the state was bulk. When I checked on the connect app, they were displaying a battery temp of -1°C, which is incorrect as I'm in the tropics and have no temp sensor on my BMV. I had to dig into the settings and disable the "low temperature cut off" to get them to charge again. This happened immediately after the last firmware upgrade (1.61 and 2.44).