Root element for PvPlanner calculate request
Optionally, terrain or horizon data can be specified, otherwise default values are fetched for given latlng
optional, if 'true' mounting angles are not taken into account during calculation, but the optimized angles which are also returned in result
Root element for PvPlanner calculate response
PV system summary text, example: PV system: 1.0 kWp, crystalline silicon, fixed free, azim. 180° (south), inclination 30°
Global horizontal irradiation and air temperature - climate reference
Monthly sum of global irradiation [kWh/m2]
Daily sum of global irradiation [kWh/m2]
Daily sum of diffuse irradiation [kWh/m2]
Daily (diurnal) air temperature [°C]
Minimum air temperature [°C]
Maximum air temperature [°C]
Interannual variability of annual global horizontal irradiation [%]
Relative Humidity [%]
Precipitable Water [kg/m2]
Monthly sum of direct normal irradiation [kWh/m2]
Daily sum of direct normal irradiation [kWh/m2]
Surface albedo from 0 (low) to 1 (high)
Wind speed at 10 m [m/s]
Precipitation rate [mm]
Global in-plane irradiation
Monthly sum of global irradiation [kWh/m2]
Daily sum of global irradiation [kWh/m2]
Daily sum of diffuse irradiation [kWh/m2]
Daily sum of reflected irradiation [kWh/m2]
Losses of global irradiation by terrain shading [%]
PV electricity production in the start-up
Monthly sum of specific electricity production [kWh/kWp]
Daily sum of specific electricity production [kWh/kWp]
Monthly sum of total electricity production [kWh]
Percentual share of monthly electricity production [%]
Performance ratio [%]
System losses and performance ratio
Energy conversion steps and losses:
1. Initial production at Standard Test Conditions (STC) is assumed,
2. Reduction of global in-plane irradiation due to obstruction of terrain horizon and PV modules,
3. Proportion of global irradiation that is reflected by surface of PV modules (typically glass),
4. Losses in PV modules due to conversion of solar radiation to DC electricity; deviation of module efficiency from STC,
5. DC losses: this step assumes integrated effect of mismatch between PV modules, heat losses in interconnections and cables, losses due to dirt, snow, icing and soiling, and self-shading of PV modules,
6. This step considers euro efficiency to approximate average losses in the inverter,
7. Losses in AC section and transformer (where applicable) depend on the system architecture,
8. Availability parameter assumes losses due to downtime caused by maintenance or failures.
Losses at steps 2 to 4 are numerically modeled by pvPlanner. Losses at steps 5 to 8 are to be assessed by a user.
Global in-plane irradiation (input)
Global irradiation reduced by terrain shading
Global irradiation reduced by reflectivity
Conversion to DC in the modules
Other DC losses
Inverters (DC/AC conversion)
Transformer and AC cabling losses
Reduced availability
Total system performance
Energy output [kWh/kWp]
Energy loss [kWh/kWp], optional
Energy loss [%], optional
Performance ratio [partial %]
Performance ratio [cumul. %]
Average yearly sum of global irradiation for different types of surface
Horizontal surface
Optimally inclined surface
Surface with 2-axis tracking
Selected system surface mounting
Average yearly sum of global irradiation [kWh/m2]
Relative comparison to optimally inclined [%]
Optimum inclination angles for different mounting types
Solar radiation reference and inplane values, strategy comparison and optimum angles includes
Photovoltaic calculation results