Estimation & Performance Calculators for Grid-Connected PV Systems
# Joint Research Centre is a world wide PV performance calculator for your planned PV installation.
# A new map-based interface for PVWatts has been released. This new version combines capabilities from both
version 1 (below) and a gridded monthly data set; this updated interface is available at PVWatts. The interface
below has been retained for the near future. http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/
# PVWatts™ Grid Data Calculator (Version 2)
PVWattsTM Grid Data calculator allows users to select a photovoltaic (PV) system location in the United States from an interactive map.( The PVWattsTM calculator was developed by NREL's Electricity Resources and Building Systems Integration Center).
# UK Wind Speed Database
# Using the UK Wind database
The UK wind speed database works using a six character Ordnance Survey grid reference. To find this grid reference you can use the following conversion tool, from Streetmap:
You will need to edit the eight character LR value that's returned:
Eg. The BWEA office postcode is N1 0PW. Typing this into the above converter returns:
LR - TQ315835
# This value is made up of three values - two letters, and then two sets of three numbers - TQ 315 835 for the above example. Click here to see the Ordnance Survey guide to the National Grid.
The database uses a six digit grid reference, so you need to drop the third digit from each of the two numbers: this would make the above example TQ 31 83
# Click the link below to use the DTI Wind Speed Database:
Select a region and type in the six character grid reference as described above (with no spaces) and then hit the Find Wind Data button. This should return the wind speeds for the locatiopn you specified.
# The DTI also provide a desktop version of the database and ASCII data files which can be imported into a GIS system. Both of these can be downloaded here:
If you wish to pursue the investigation of a particular site further, then we recommend that you contact us with your requirements.
# UK Solar Panels Installer
Leading solar panels installer in the UK. Intelligent Energy Solutions is a fully MCS accredited and award winning installer of solar pv systems and heat pumps.
Intelligent Energy Solutions, one of the East Midlands’ leading renewable energy companies, has been awarded the title of Energy Management Installer of the Year at the 2011 Renewables Awards.