unfortunately not all parameters can be set with the built-in screen and buttons. here the list of items that can be set: 12-4 Query Menu Operation The display shows current contents that have been set. The displayed contents can be changed in query menu via button operation. Press ‘Enter’ button to enter query menu. There are seven query selections: - Input voltage or frequency of AC input - Frequency, voltage, power or load percentage of AC output - Input voltage or power of PV input. - Battery voltage or capability percentage. - Date and time. - Today or total energy generated. - Mode of query energy generated. I need to adjust e.g. the AC output timer and fine tune the charger (V_float), which requires the use of the SolarPower app and a working communication link I presume.