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element namegeometry
defined in

Parametrization of PV system mounting type used for calculating GTI and PVOUT. If this element is missing and GTI/PVOUT is requested, flat-lying PV panels are considered (GTI=GHI). Examples:

<pv:geometry xsi:type="pv:GeometryFixedOneAngle" azimuth="180" tilt="25"/>

<pv:geometry xsi:type="pv:GeometryOneAxisHorizontalNS" rotationLimitEast="-90" rotationLimitWest="90" backTracking="true" axisDeviation="0"/>

<pv:geometry xsi:type="pv:GeometryOneAxisInclinedNS" axisTilt="30" rotationLimitEast="-90" rotationLimitWest="90" backTracking="true" axisDeviation="0"/>

<pv:geometry xsi:type="pv:GeometryOneAxisVertical" tilt="25" rotationLimitEast="-180" rotationLimitWest="180" backTracking="true"/>

<pv:geometry xsi:type="pv:GeometryTwoAxisAstronomical" rotationLimitEast="-180" rotationLimitWest="180" tiltLimitMin="10" tiltLimitMax="60" backTracking="true"/>


required, concrete type of given geometry. Use one from GeometryFixedOneAngle, GeometryOneAxisHorizontalNS, GeometryOneAxisInclinedNS, GeometryOneAxisVertical, GeometryTwoAxisAstronomical, see table below

@azimuthorientation of tilted panel surface in degrees, defined as true geographical azimuth (0:north, 90:east, 180:south, 270:west, 360:north), default is 180 deg., the attribute is not defined for a horizontal surface, required only for 'GeometryFixedOneAngle' type
@tilttilt of panel surface in degrees range (0, 90), 0=horizontal, 90=vertical surface, required for 'GeometryFixedOneAngle' and 'GeometryOneAxisVertical' types

optional, tilt of rotating inclined axis in degrees, 0 = horizontal, 90 = vertical axis, only considered for 'GeometryOneAxisInclinedNS',

WARNING: if this attribute is missing, the value defaults to 30 degree.


optional, . Tracker axis of GeometryOneAxisHorizontalNS or GeometryOneAxisInclinedNS types type is typically placed in the North-South direction (axisAzimuth=180 degrees, South, the default). This attribute allows for deviation of the axis direction. Take the endpoint of the axis which is closer to the Equator. Center of the rotation is the midpoint of the axis. Rotate the endpoint eastward by using positive values ranging from 0 deg. to 45 deg.. Rotate the endpoint westward by using negative values ranging from -45 deg. to 0 deg.. Zero degree value means no deviation (the default, North-South axis alignment). Please see the explanation belowa different axis azimuth. It is an integer value in degrees. The value of geographical azimuth (a compass value, from 0 to 360 exclusive), at which the southern end of the axis is oriented. Regardless of the Earth's hemisphere. The value is limited to the range from 135 deg. to 225 deg. inclusive, so the deviation from the North-South line is never bigger than 45 degrees.


optional, default is the unlimited motion in the range (-180, 180), used for all trackers. The general rule is: negative value is used for the east side, positive for the west side, the same rule applies for both hemispheres). The meaning is slightly different for different type of trackers:

GeometryOneAxisHorizontalNS: rotation limits are defined as tilt of tracker table relative to its central position (which is horizontal=0 deg.), both limits are typically symmetric, e.g., rotationLimitEast=-50, rotationLimitWest=50

GeometryOneAxisInclinedNS: rotation limits are defined as tilt of tracker table relative to its central position (in this case the inclined plane defined by axisTilt attribute), both limits are typically symmetric, e.g., rotationLimitEast=-50, rotationLimitWest=50

GeometryOneAxisVertical: rotation limits are defined relative to 0 deg. (initial tracker position regardless of hemisphere), default range from -180 to 180 deg (-90 deg. east and +90 deg. west)

GeometryTwoAxisAstronomical: definition (for vertical axis) is the same as with GeometryOneAxisVertical tracker

@rotationLimitWestoptional, westward motion limit, described above
@tiltLimitMinoptional, only used with the horizontal axis of 'GeometryTwoAxisAstronomical' tracker. Limit is defined in the range of degrees (-90, +90), relative to the horizontal position of the tracking surface (0 deg.). Example: tiltLimitMin="0" tiltLimitMax="60", the tracker follows the sun elevation in the range from horizontal position to 60 degree of tilt.
@tiltLimitMaxoptional, max tilt of the tracking surface, described above
@backTrackingoptional boolean value, default is 'false' - tracker moves freely regardless of the neighbors, value is 'true' - tracker moves in the way it avoids shading from neighboring tracker constructions.