Estimated Solar Power

Given your location, we look up the average amount of solar energy arriving from the PVGIS solar atlas. You can take a look at it here
We then calculate the distribution of this energy over an average year. This distribution is taken from the NASA POWER projects database of world renewable energy resources You can take a look at it

We use an average efficiency rating for solar panel energy conversion of 14%. Panels are available for sale in the uk with efficiency of between 6% and 18%
We have a list of most panel models and their specifications available here. You can set a different efficiency value by pressing the Show Advanced Fields button under the Solar PV tab
We multiply the available roof area by the solar energy arriving and the efficiency
We then apply factors to calculate the effect of roof pitch, roof orientation and shading
Finally we apply a reduction factor to allow for inverter and cable losses that occur when the solar panels direct current is converted into an alternating current suitable for use in a property or for exporting to the grid.
We calculate this value for each month of the year.

We have analysed a number of solar pv installation quotes provided and developed a price calculation that you can review here. This is the calculation we use to give a guide price based on the peak output of the chosen panels.

Using the locations energy use and the chosen energy use profile, we match the solar pv installations output with the energy used.
Any energy that is not used on site, we mark as exported.
We display this under the Energy Projection tab
Using the given import(buy) tariff, and export(sell) tariff and the clean energy cashback feed-in tariff for a system of the chosen size, we calculate an estimated value for each year.

If you have any further questions about this process please get in contact with us at information@rensmart.com