Quote Originally Posted by Matt8500 View Post
The install was 21K for roughly 7.5 kw potential, but that was as we went for in roof panels for looks rather than the normal install. Yes 10Kwh battery, but also the auto backup for power cuts (which we get annoyingly frequently).

It’s not randomly picked months, it was last month- February which is one of the worst of the year, and the saving was over 400 quid. We are in the south so that helps, but the maths still add up to way more than your break point.

Like I said I am no champion of solar, but if you’ve got a reasonable sized roof facing the right way it is at least worth doing the maths properly, taking into account usage and the tariffs available.
How long to recoup the £21k?