If you have already got it registered and look at the Foxesscloud website, inverter details page - the datalogger serial number is shown there.
If not look at the datalogger itself and on the front is a label with a QR code - your phones camera will display the SN when you hover over it, if not just below the QR code in very small text is the SN looks something like '662W2E5F1234567'
If not look at the datalogger itself and on the front is a label with a QR code - your phones camera will display the SN when you hover over it, if not just below the QR code in very small text is the SN looks something like '662W2E5F1234567'