Solar provider sent an email explaining how to set up the inverter's dat-logging wifi thingie. It was a short YouTube video that was easy to follow as the computer they demonstrated it on was a Mac using the Firefox browser.
Quite unnecessary in my case as the installers set it up for me on the day of installation.
Shouldn't be too long now before a grid feed-in tariff is established with the power retailer, the solar providers sent them the info about 15 hours ago (after initially sending said info to the wrong retailer).