Snorvey wrote:
And I'm assuming a 4kw system is still the maximum permitted for a domestic installation?
I don't think that's ever actually been the case, although there are reasons why it's commonly misunderstood for domestic Solar PV installations -
You can have more than 4kWp -
It’s a very common misconception that domestic Solar PV systems are limited to 4kWp. This myth was driven by two factors. Firstly the tariff used to reduce for installations above 4kWp, not so any more, it’s the same between 0-10kWp and actually goes up for installations over 10kWp. The other is the paperwork when registering installations with the local DNO, they’re the people who maintain the wires that supply your electric. If you’re installing 4kWp or less then it’s a ‘fit and inform’ process. If you want to install more than 4kWp then a pre-application is necessary. The pre-application process involves a lot more work for the installer so many installers have been in the habit of putting customers off the idea of having a larger system.
https://nakedsolar.co.uk/how-much-pv/
Cheers,
Itsallaguess