PVGIS24 CALCULATOR

Mounting position ?

One-section overlay mounting system

Roof-integrated mounting system

Triangle mounting system on flat roof or slab on grade

Two roof sections overlay mounting system

East-West mounting system on flat roof or slab on grade

North-South mounting system on flat roof or slab on grade

Three-section roof-mounting system

Four-section roof-mounting system

Peak installed photovoltaic power (kWp) ?

Peak power must be entered in kilowatt-peak

kWp

Slope & Azimut ?

PVGIS24 can calculate optimal values for slope and aspect (assuming fixed angles throughout the year).

The sum of the power of the sections must not be greater or less than the power crete : kWp

Section 1

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 1

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 2

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 1

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 2

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 3

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 1

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 2

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 3

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 4

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 1

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 2

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 1

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

Section 2

Power

kWp

Slope

°

Optimization

Azimuth

Optimization

The value must be between 0 and 90

System loss (%) ?

Cable loss (%)

Inverter loss (%)

PV loss (%)

The total loss sum should not exceed 100.

PVGIS24 CALCULATOR

geolocation

SYSTEM INFORMATION

Performance Simulations of Crystalline Photovoltaic Systems Connected to the Public Grid Installed on Roofs

SOLAR PROJECT ” SOLAR PROJECT”

Results ” SOLAR PROJECT SIMULATION 1”

PVGIS ESTIMATES OF SOLAR ELECTRICITY PRODUCTION

Geolocation of the photovoltaic system ?

?

Terrain shadows

Information from grid-connected photovoltaics

Loss

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Default “FREE STANDIN” For fixed systems, the way modules are mounted will influence module temperature, which in turn affects efficiency. Experiments have shown that if air movement behind the modules is restricted, the modules can become significantly hotter (up to 15°C at 1000W/m2 sunlight). In the application there are two possibilities: stand-alone, which means the modules are mounted on a rack with air circulating freely behind the modules; and roof added/building integrated, which means the modules are completely integrated into the wall or roof structure of a building, with little or no air movement behind the modules. Some mounting types fall between these two extremes, for example if the modules are mounted on a roof with curved roof tiles, which allows air to move behind the modules. In such cases, the performance will lie somewhere between the results of the two calculations that are possible here. In such cases, to be conservative, the added roof/building integrated option can be used.

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Default “1” This is the power that the manufacturer states that the photovoltaic array can produce under standard test conditions, which are a constant solar irradiance of 1000 W per square meter in the array plane, at an array temperature of 25°C. Peak power must be entered in peak kilowatt (kWp).

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If you have the possibility to choose the angle and azimuth or orientation of your mounting system for your solar installation, whether on a flat roof or on the ground (concrete slab), you will check the optimization both angle and azimuth. PVGIS24 can calculate optimal values for slope and aspect (assuming fixed angles throughout the year). • Slope 15 if southern hemisphere / Optimize the slope This concerns the angle of the photovoltaic modules in relation to the horizontal plane, for a fixed installation (without monitoring). • Azimuth 180 if southern hemisphere / Optimize the angle. The azimuth, or orientation, is the angle of the photovoltaic modules relative to the direction: NORTH 180° NORTH-WEST 135° WHEST 90° SOUTH-WHEST 45° SOUTH 0° SOUTH-EAST 45° EAST 90° NORTH-EAST 135°

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Estimated system losses are all losses in the system that cause the energy actually delivered to the power grid to be less than the power produced by the PV modules. • Cable loss (%) / default 1% PVGIS24 is based on international standards for line loss in cables. this loss is estimated at 1%. You can reduce this loss to 0.5% if the quality of the cables is exceptional. You can increase the line loss of the cables to 1.5% if the distance between the solar panels and the inverter is greater than 30 meters. • Inverter loss (%) / default 2% PVGIS24 is based on the average of inverter manufacturer data to estimate the production transformation loss. The international average today is 2%. You can reduce this loss to 1% if the quality of the inverter is exceptional. You can increase the loss to 3% to 4% if the chosen inverter offers a transformation rate of 96%! • PV loss (%) / default 0.5% Over the years, the modules also tend to lose some of their power, so the average annual production over the life of the system will be a few percent lower than the production in the first few years. The various international studies including those of Sarah and Jordan KURTZ estimate an average production loss of 0.5% per year. You can reduce this production loss to 0.2% if the quality of the solar panels is exceptional. You can increase the loss from 0.8% to 1% if the solar panels chosen are of average quality!

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The solar radiation and photovoltaic production will change if there are local hills or mountains that block sunlight during certain periods of the day. PVGIS can calculate the effect of this by using data on ground elevation with a resolution of 3 arc-seconds (approximately 90 meters). This calculation does not take into account shadows from very close objects such as houses or trees. In this case, you can upload your own information about the horizon by checking the "Download horizon file" box in CSV or JSON format.

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- PVGIS-SARAH3: Data available from 2005 to 2023. Covers Europe, Africa, most of Asia, and some regions of South America. Based on satellite observations, it offers high accuracy for solar irradiance. - PVGIS-SARAH2: Produced by CM SAF to replace SARAH-1 (PVGIS-SARAH). It covers Europe, Africa, most of Asia, and some regions of South America. Period: 2005-2020. - PVGIS-ERA5: Latest global reanalysis provided by ECMWF (European Centre for Medium-Range Weather Forecasts). Period: 2005-2023. The reanalysis of solar radiation data generally presents higher uncertainty than satellite databases. Therefore, we recommend using reanalysis data only when satellite data is unavailable or outdated. For more information on databases and their accuracy, please refer to the PVGIS web page on calculation methods.

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PVGIS24 CALCULATOR

geolocation

SYSTEM INFORMATION

Performance Simulations of Crystalline Photovoltaic Systems Connected to the Public Grid Installed on Roofs

SOLAR PROJECT ” SOLAR PROJECT”

Results ” SOLAR PROJECT SIMULATION 1”

PVGIS ESTIMATES OF SOLAR ELECTRICITY PRODUCTION

Geolocation of the photovoltaic system ? ? ×

Terrain shadows

Information from grid-connected photovoltaics

Loss

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Geolocation of the photovoltaic system ?

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