Page 36 - Energize April 2022

NEWS

Monitoring small-scale PV installations

for efficiency

he increasing number of photovoltaic (PV) solar panel installations at small-to-
medium-sized businesses raises the question of how to monitor the energy efficiency
Tof the PV system. Delta OHM has launched the LPPYRA-Lite pyranometer which is
specifically designed to monitor general solar radiation on small-scale PV installations.
“With PV panels being installed at smaller retail and commercial operations it would
make sense to track the efficiency levels. The compact LPPYRA-Lite integrated in a Delta
OHM HD35 wireless data logger will give you the ability to monitor the efficiencies of your
small-scale PV system with what is the most cost-effective device available on the market”
says Jan Grobler, the managing director of GHM Messtechnik South Africa.
LPPYRA-Lite is a small and light pyranometer based on an accurate thermopile sensor
for ordinary monitoring of smaller PV systems. Its exceptionally compact dimensions make
for an easy installation and integration into any application.
Being classified as Class C Spectrally Flat according to ISO 9060:2018 guarantees
the accuracy, reliability and precision of its measurements and its compliance with the
reference standards. Each sensor is characterised by its own calibration factor which is
indicated on the body of the pyranometer.
Designed for direct tilted installation on a PV panel plane, it does not require any
levelling device. For horizontal positioning an optional fixing base with an integrated
levelling device can be supplied. efficiencies and benefits achieved through
Two versions are available the LPPYRA-Lite: μV/Wm with an impedance of 33 to 45 Ω accurate monitoring of the PV panel
2
and the LPPYRA-Lite AC: 2-wire (current loop) with 4 to 20 mA (R L ≤500 Ω). installations is the big plus of the LPPYRA-
2
The measurement range of the of the LPPYRA Lite is 0 to 2000 W/m and gives a viewing Lite technology. It is the most accurate
angle of 2πsr. Weighing 146 grams, its connection has a 4-pole M12 connector. LPPYRA-Lite and cost-effective technology available”
passive version requires no power whilst the LPPYRA-Lite AC requires 10 to 30 VDC. concluded Grobler.
“Small scale PV plants can be seen everywhere, on parking and building roofs at retail
and business parks. Industrial and engineering factories are also installing solar panels Contact Jan Grobler, Messtechnik South
around selected parts of their premises. The investment for the establishment of a PV solar Africa, Phone 011 902-0158,
panel plant and the subsequent installation and maintenance is not insignificant, so the info@ghm-sa.co.za

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