Factory firmware version 64.09 does not have "presumably good" MPPT logic - tested. 264.62 has "presumably good" MPPT logic - tested, also has SOC. Updated and Remote Panel_Reflash_MCU(38.18) I didn't notice any difference.
The factory firmware version 46.82 has "supposedly good" MPPT logic and works much better. There is also SOC, but it is visible and adjustable only on the inverter, on the applications it is displayed in volts. The display has also been updated v12.28.
If anyone needs it. I haven't tested it, it's probably for 28066. Maybe Coulomb can see it and tell which inverter it is for. MAXE11K_TWIN_DSP_78.10.zip