[ainarssems]

Is there any point in exporting to the grid?

Not really with prices ranging from 1.5-4.5p for fixed tariffs, if you say export 2000kWh per year it's £30-90 per year. The payments are unlikely to increase much as the generation is at the wrong time. Solar max output is in the middle of day 10am to 2pm but max consumption is 5-7pm. And on sunny days everybody with solar panels is producing power at the same time so there is excessive power at that time and for large industrial producers National Grid can request to to reduce production, switch it off or ask them to pay for exporting. There might be some viable options in the future if you have battery storage and Smart export tariff and you can export on demand when required. At the moment I think it only works with Octopus and Tesla Powerwall but at the current prices I think battery wear and reduced life from extra charge/discharge cycles are still not worth it.