If you buy or borrow, a AC/DC clamp meter, you will be able to check at various points whether solar is being produced, batteries are charging or discharging and whether you are importing or exporting. Useful tool to do your own system checks.
I have this one https://www.test-meter.co.uk/martindale-cm79-true-rms-ac-dc-clamp-meter
Its paid for it self on first fault finding job.
I have this one https://www.test-meter.co.uk/martindale-cm79-true-rms-ac-dc-clamp-meter
Its paid for it self on first fault finding job.