The RenSMART Star Rating gives a quick guide to the availability of renewable energy at a location. Every UK location has been given a rating from 0 to 5 stars. The number of stars is based on the renewable energy available at a site compared with the distribution of renewable energy across the UK.
We took information for 900 thousand points across the UK to generate a distribution graph of wind speeds and solar energy across the UK.
We converted the average wind speeds to the renewable energy potential using Betz' Law
The locations were rated with 1 star going to the poorest 10% of locations and 5 stars going to the best 10% of locations.
Other star ratings were allocated based on the percentage of locations with a similar renewable energy potential.
The area element of the wind energy value is based on the area swept by the wind turbines blades.
|Star Rating||Average Solar Energy per day|
kWh per m2
|Average Wind Energy per day|
kWh per m2
|5||More than 3.22||More that 7.1||Top 10%|
This is our current methodology but may change in the future.