4000TL: no output

[digital48]

what size cable has been used, and what length of cable from inverter to mains?

Looks like the thinnest is 2.5mm twin and earth from the generation meter to the isolator (there's much thicker in a white sheath from inverter to the meter) and the total length is around a metre.

Also check the grid voltage reading on the inverter before the inverter starts feeding in, and immediately afterwards a few times at peak generation to see what difference the inverter makes to the voltage it's seeing.

I'll try to catch it!

It does seem to trip after it's been pushing out at its maximum for the day (2.7kW?) for a while.