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export tarriff is not worth the extra money to go MCS if you can install yourself, I installed a 5kw system, cost less than £4000, payback is less than 2 years, yes I give some back to the grid occasionally but will install batteries now you can get 10kw storage system that will pay for itself...

I have a 5kw system, used zappi to charge from 100% solar yesterday and got 20kw, would have got more but the car was fully charged by then. Car is at home most daytimes so 99% of the time it is only charged via solar. Two reasonably sunny days will charge it from flat to 100% easily, could...

they allow you to fit the system, but you will probably find the commissioning paperwork says the system should not be able to send more than 4kw to the grid. I.E. if you are not using enough , the inverter should limit what goes back to the grid. Think that is part of the regs.

Just be aware that the DNO will not want you to send more than 4kw back to the grid, so no point putting in a large system for the sake of it, unless you will be able to use it.

Wouldn't pay out for batteries, wait till all Evs can feed the juice back to your house, you will then not only have an electric car, you also have a portable battery pack for your house, win win.

I installed my own system, 5KW from 14 panels, once you go above 4kw the regs change and the system becomes a"solar farm" , 4kw+ system comes under same regs as a field full of panels. There was no FITS when I installed and the extra cost involved in getting it MCS approved would have cost more...