I just checked physically tonight all my installation, and after switching off the emergency breaker, I got an error 39 ! Currently the Smartsolar detects the correct voltage, but the voltage battery remains blinking "24", and I can change it to 48. BTW, it is currently at night,. so no power coming from the panels.
First time I see the error, and I don't know if it is informationnal, of if for any reason the Smartsolar would have been damaged.
Any comment, information is welcome, thanks, Michel