If you have a SolarLog computer to monitor a photovoltaik system and would like to access the current power consumption or power production from an own app (e.g. to display it on a widget on your computer), you can simply download
http://[IP of SolarLog computer]/min_cur.js?nocache
and look for a row “var PacArr= [, ];”.
It contains the current power consumption in watt (971) and the current production in watt (0).