Historical daily generation data

Can you retrieve historical daily generation data

Yes, just go to the portal and the inverter tab and find the tab with the data on and download it - or you can go to the energy tab and click the download button. the latter gives you the daily data - depending on what you are viewing depends on how many days you can get.

Is it possible to download more than one day's data at a time? I'd like to basically download a single spreadsheet with all energy flow data, ideally half hourly. If there's an option to do this on the portal I'm missing it.

Thanks.

I've been looking at historical data and for some reason they are using a 12 hour clock, therefore for a given date/time you get two different data sets.