Designed as an accessory to NRG’s SRA System, the Soiling Measurement Kit provides users with the information needed to quantify the site-specific impacts of soiling caused by snow, dust, and other particles on prospective and current PV projects. These data are used to improve pre-construction annual energy production (AEP) estimates as well as maintenance schedules (i.e., panel washing) and forecast models in the post-construction setting.

The Soiling Measurement Kit interfaces with the SymphoniePRO Data Logger via its interface module, which provides four 0 V to 5 V (analog) signal outputs:

The interface module requires a single 12 V excitation (EXC) and ground connection (GND) available from any combination of built-in logger channels (16-19) and P-SCM channels (20-26). P-SCM channels require P-SCM item 9132.

• Determine site-specific soiling loss characteristics with this turnkey soiling measurement solution.
• Install easily as an accessory to NRG’s SRA System – complete with PV modules, pre-installed back-of-module temperature sensors, flexible mounting hardware, and integrated soiling interface module.
• Measure short circuit current and back-of-module temperature with user’s choice of statistical interval as well as optional 1 Hz sample data collection for flexible analysis options to meet data demands.
Quantify the site-specific impacts of soiling on prospective and current PV projects with NRG’s Soiling Measurement Kit.

  • Three (3) 15W PV panels (data logger power, dirty panel, clean panel)
  • Two (2) back-of-module temperature sensors
  • One (1) interface module (in shelter box)
  • Related mounting and wiring components