Best answer by PeterR1947
if you have solar panels, the next reading is useful "EXP KWH" is the total electricity exported to grid for example "0000272.4" then a load of other readings which you don'y need.
Reading the gas meter is similar, first it gives you the volume in cubic meters which is what you need to submit to OVO, followed by the kWh and other details you don't need
If your smart meter isn’t giving OVO your meter readings though, this could indicate that there is a problem with the signal. To get this checked out, contact the Social team on Facebook - https://www.facebook.com/ovoenergy/ or Twitter - https://twitter.com/OVOEnergy. They’ll be able to run through some questions with you to help determine if it’s a communication issue with your smart meter.
Check this topic on how to take a reading from a SMETS2 meter.