NRG Instructions
SRA System | All-Weather PVH Kit
SRA_All-Weather_PVH_Kit_Instructions
Rev. 5.0
[email protected] | Page 4
18 April 2018
INTRODUCTION
The NRG SRA’s All-Weather PVH Kit adds the capability of the Hukseflux VU01 Ventilation unit to your
SRA system. When used in conjunction with a Hukseflux SR20 pyranometer, the VU01 will increase the
reliability, dependability, and accuracy of the sensor in all conditions.
Ventilation prevents the formation of dew and frost on pyranometers. During warmer months, the
ventilation fan helps eliminate dew, while in colder months the heater promotes evaporation of water
droplets and sublimation of snow and ice.
To accommodate the power requirements of the VU01, the PVH Kit uses a second 2.2m tower, frame-
mounted PV panels, a deep-cycle battery bank, and charge controller. The system is controlled by a
preprogrammed PLC which switches the fan and heater on and off. The system status is monitored by
our SymphoniePRO data logger.
NRG Systems has created three PVH Kit options, depending on the climate of your site. Make sure that
you have the proper number of panels and batteries for your intended application.
Kit 11708: (1) 60W PV panel; (1) deep-cycle battery. Optimized for sites that experience dust
and dew accumulation.
Kit 11709: (2) 60W PV panels; (2) deep-cycle batteries. Optimized for sites that experience minor
snow accumulation.
Kit 11710: (3) 60W PV panels; (3) deep-cycle batteries. Optimized for sites that experience snow
& ice buildup.
