About SimSolar

SimSolar helps you estimate the financial and carbon costs and benefits of installing solar panels. It works for most addresses in London. Using data on the shape, size, and orientation of buildings (and open space), it works out how many solar panels could be fitted, and how much sunlight they would receive. This allows the potential electricity generation to be estimated.

As well as long-term calculations, it also shows you what you could be generating right now by taking into account the position of the Sun and weather details. You can use this information to start to think about what it might be like to live with solar power. The more of your own generation you use, the bigger the financial and carbon savings!

SimSolar is based on another project called the London Solar Opportunity Map , which in turn uses data from a model called 3dStock . SimSolar was developed by Andy Brace, Michael Fell, and Dominic Humphrey, with additional input from Ed Sharp. It has received initial funding from UCL via the BSEER Development Fund. If you have any questions, comments, or suggestions, please contact us at


How it works