PV system configuration
apply panels self shading
Installed PV system power [kWp]
lower limit is 0 kWp
PV system startup date for degradation calculation
PV system availability [%]
Losses of system components
Annual value of the percentual loss [%]; Typically 1 – 10% loss of power
12 monthly values of percentual losses [%]; Typically 1 – 10% loss of power
Omic losses pre-calculated by user [%]; Typically 0.7 – 1.5 % loss of power
Given by manufacturer (power tolerance dependent) [%]; Typically 0.5 – 1.0 % loss of power
AC losses - transformer [%]
AC losses - cables [%]
Syntethic DC losses - aggregated PollutionSnow, DCCables and DCMismatch losses [%]
Transformer and AC cabling losses [%]
annual degradation of pv modules [%]
annual degradation for the first year [%]
empirical coeff, dimensionless (typical value 0.12)
low limit tolerance of nominal power at STC [%]
high limit tolerance of nominal power at STC [%]
Nominal Operating Cell Temperature (NOCT) [°C]
Thermal coeffiecient of Open circuit voltage, in % per degree Celsius [%/°C]
Thermal coefficient of Short circuit current, in % per degree Celsius [%/°C]
Thermal coefficient of nominal power at STC, in % per degree Celsius [%/°C]
required if installedPower is not defined and vice versa
PV module type enumeration
crystalline silicon (c-Si)
amorphous silicon (a-Si)
cadmium telluride (CdTe)
copper indium selenide (CIS)
number of modules
[W]
minimum power when inverter starts to work [kW]
maximum power when inverted limits the AC output [kW]
[kW]
number of inverters
inverter interconnection enumeration
Inverter efficiency model abstract type
Constant inverter efficiency, typically 70 - 100 [%]
Efficiency curve defined by data pairs
PV systems topology configuration
if unspecified, default value is PROPORTIONAL (CSI,ASI,CDTE) or UNPROPORTIONAL1 (CSI)
The parameter has effect only if back-tracking is true in the case of tracking systems. It specifies the ratio between distance between the equivalent trackers legs (axis) and pv collector width. It has an effect for GeometryTwoAxisAstronomical tracker and GeometryOneAxisHorizontalEW tracker. For fixed mounting this parameter is used to calculate the impact of self shading.
DEPRECATED use TopologyRow instead
The parameter, has effect only if back-tracking is true in the case of tracking systems. It specifies the ratio between distance between the equivalent trackers legs (axis) and pv collector width. It has an effect for GeometryTwoAxisAstronomical, GeometryOneAxisVertical, GeometryOneAxisHorizontalNS and GeometryOneAxisInclined.
Shading angle is the lowest sun elevation angle above the horizon plane which doesn't cause mutual shading between rows of PV modules
[m]
[m]
Optimization category into which field topology of PV system belongs, qualitative and empirical ranking
applicable for a-Si, CdTe and CIS (thin film technologies), the loss of generated electricity is proportional to the size of module area in shade
applicable for c-Si, modules are landscape oriented with proper layout optimization
applicable for c-Si, modules are landscape oriented with intermediate layout optimization
applicable for c-Si, modules are portrait oriented with poor layout optimization, bottom cells in shade will shut the whole row of modules down
PV system mounting abstract type
False value for the backTracking attribute corresponds to a single tracker without neighbours (best possible option).
rotationLimitEast/rotationLimitWest are the parameters pair of limiting rotation angles for 1xV, 2x and 1xNS horizontal or 1xNS inclined trackers. If tracker is purely theoretical (no limits) the value of [-180,180] should be used.
tiltLimitMin/tiltLimitMax parameters are the pair of limiting tilt angles for 2x trackers. Because of technical realisations of variable tilt often alinear actuator is used, inclination angle seldom varies from (0 to 90) but often has smaller range eg.(10 to 80). If tracker is purely theoretical (no limits) the range -90 to 90 should be used. Selecting tilt limits of [45,45] will convert 2x tracker to 1x vertical with 45 degrees tilt
Inclined surface tilt; 0 horizontal, 90 vertical
Inclined surface orientation; 0 for North, 180 for South, clockwise