Here I can help!!
You need a wifi dongle for the inverter:
https://www.ebay.co.uk/itm/WiFi-Module-for-Growatt-Inverter/282060805007ShinePhone on the mobile, or use their online tools:
http://server.growatt.com/The online tools have a demo mode, so you can see what it can do (example plants, bottom left). I really rate it.
Default page shows today so far in small splits (25mins I think):

By day:

By month:

Can also do by year, not shown.
Double click on a period and it drills into it, so double click '2018' and its shows by month, double click may and it shows may by day, double click a day to see the part day split.
You can also do 'plant' and see by inverter, so each inverters output is overlayed:

Devices and datalogger (which is the wifi dongle bit):

Devices and inverter:

I have a 1kW and a 1.5kW inverter, also briefly had a broken 1kW inverter as was spotted very quickly here:

Double click an inverter and you get into the logs for it:

easily exported/loaded into excel and has loads of info.
Tons of other stuff too that I haven't gone into here...
As I say, I rate the software.. have used a few and really got along with this one. Not perfect but pretty darn good!