PVGIS is an online free solar photovoltaic energy calculator for stand alone or connected to the grid PV systems and plants, in Europe, Africa, America and Asia. Solar electricity generator simulation and solar radiations maps

PVgis is  the ideal free online tool to estimate the solar electricity production of a photovoltaic (PV) system.
It gives the annual output power of solar photovoltaic panels.
As a photovoltaic Geographical Information System it proposes a googlemap application that makes it easy to use.

The area covered by the calculator is almost the world, America, Europe, Asia and Africa.

This application calculates the monthly and yearly potential electricity generation E [kWh] of a Photovoltaic system with defined modules tilt and orientation.

If you select the menu GRID CONNECTED, you will get a calculator for fixed solar panels. With the menu TRACKING PV, PVgis compute the electricity generated by 1-axe or 2-axes solar PV trackers.

All data and results of simulations can be downloaded in CSV (Excel), pdf or viewed in html files. Note that PVgis is only available online, in english, italian, french, spanish and german. 
Pvgis is a free solar PV energy calculator implemented by the JRC (Joint Reseach Center) from the European Commission's in-house science services.

PVGIS can't be downloaded. To download free softwares see : Free Photovoltaic software to download or Softwares and tools from inverter manufacturers

NEW : Now PVgis covers also America (USA, Brasil, Colombia, Peru, Mexico...) and asia (China, India, Indonesia, Russia...)

Link to PVgis photovoltaic worlwide simulator:

PVGIS for Europe, america, asia and Africa

PVGIS : estimation of solar photovoltaic energy output system in Europe, america, africa and Asia

PVGIS for PV remote systems almost anywhere in the world (America, Asia, Africa and Europe)

Via the Google map it is possible to calculate the solar energy generation for a stand-alone PV system. This is useful to get a good assessment of the energy power required to match your electrical needs in remote area not connected to the grid. 

Select the "Off Grid" menu to get the PERFORMANCE OF OFF-GRID PV SYSTEMS CALCULATOR.
After choosing your place on the map you have to enter :

  • Solar radiation database :The solar radiation data used in PVGIS have mostly been calculated from satellite data. In this way we have data for any location over large geographical areas with hourly time resolution. At the moment there are three different satellite-based databases available.
  • Installed peak PV power [Wp] : Peak power of your photovoltaic panels, This is the power that the manufacturer declares that the PV array can produce under standard test conditions, which are a constant 1000W of solar irradiation per square meter in the plane of the array, at an array temperature of 25°C.
  • Battery capacity [Wh] : This is the size, or energy capacity, of the battery used in the off-grid system, measured in watt-hours (Wh). If instead you know the battery voltage (say, 12V) and the battery capacity in Ah, the energy capacity can be calculated as Energy capacity=voltage*capacity. The capacity should be the nominal capacity from fully charged to fully discharged, even if the system is set up to disconnect the battery before fully discharged (see next option).
  • Discharge cutoff limit [%] : Batteries, especially Lead-acid batteries, degrade quickly if they are allowed to completely discharge too often. Therefore a cutoff is normally imposed, so that the battery charge cannot go below a certain percentage of full charge. This should be entered here. The default value is 40%.
  • Consumption per day [Wh] :This is the energy consumption of all the electrical equipment connected to the system during a 24 hour period. PVGIS assumes that this daily consumption is distributed in a way over the hours of the day, corresponding to a typical home use with most of the consumption during evening. The hourly fraction of consumption assumed by PVGIS is found here.
Optional hourly consumption file  : the uploaded file should consist of 24 hourly values, each on its own line, with the sum of the numbers equal to 1.
Slope/Inclination of modules : slope of your solar panels
Azimuth/Orientation of modules : Orientation (azimut or direction) of your solar panels, the best is the south for the northern hemisphere, the north for the southern

Then you will get graphs and tables that show the (estimated) daily amount of electric power you can expect in each month from a Solar Home PV system with the properties you entered (using optimal inclination, if you requested so). It also shows the yearly average production per day and gives statistics data such as the number of days corresponding to a state of charge or discharge of battery.

Note that PVgis can include the terrain shadows and it offers 2 options :
- Use the calculated horizon from PVGIS (you can even download the remote horizon data of the location. Nearest shadings due to buildings or trees is not included.
- Upload horizon file, if yu have your own horizon dataset.

PVGIS : Solar radiation Database

If you select the menu MONTHLY DATA or DAYLY DATA or HOURLY DATA, you will get the relevant radiation data for the selected location.
PVGIS provide a large and accurate solar radiation free database for europe, Africa Mediterranean Basin and South-West Asia : solar radiation interactive maps.

Furthermore it is possible to dowload for free maps of radiation for different countries and regions :
Europe, Europe Mediterranean region, Europe Alpine region, Albania Austria, Bosnia and Herzegovina, Belgium, Bulgaria, Belarus, Switzerland, Cyprus, Czech Republic, Germany, Denmark, Estonia, Finland, France, United Kingdom, Greece, Croatia, Hungary, Ireland, Island, Italy, Lithuania, Luxembourg, Latvia, Malta, Moldavia, FYR Macedonia, Montenegro, Netherlands, Norway, Poland, Portugal Romania, Serbia, Spain, Sweden, Slovakia, Slovenia, Turkey, Ucraine,     

Africa :

Burkina Faso
Cape Verde
Central African Republic
Congo, Democratic Republic of
Congo, Republic of the     
Equatorial Guinea
Ivory Coast
Sao Tome and Principe 
Sierra Leone
South Africa
South Sudan
Western Sahara

Link to the posters and maps to download : PVGIS solar radiation maps for Europe and Africa.  

See others worldwide solar radiations databases