Yeah, a solar diverter.. Plenty of options out there. I used a solarImmersion (
https://solarimmersion.co.uk/) but only because I won it cheap in an auction.
Its not ideal, storing as a low grade energy (hot water) and offsetting a cheaper fuel (gas, 1/4 the cost per unit) but its better than giving it away for free (from a selfish point of view).
It simply wires between the consumer unit and the immersion, with a sensor wire to a clamp meter around the main L tail into the house (so it knows if your importing/exporting and by how much)
Using it as a sheltered veranda is a good move for us, SW facing so afternoon/evening sun used to cook through those windows.. Its about right size/position wise and now the shadow from the panels sits just outside the patio doors. Later in the year (sun is lower) we still get solar gain (ie the sun heats the house). Best of both worlds.
If I was to do anything differently the panels would be steeper.. Much steeper. 45-50 degrees, so they get better generation from the spring/autumn sun but generate less in the summer (its easy to generate power in the summer, so who cares)
Going to be paying a company to cover the roof in solar, 4kW SE facing and maybe another 2-3kW on the garage (SW facing - Its a flat roof so shallow pitch). This all paves the way to a household battery with wheels in the future, and electric pushbikes (I have a very easy commute)