Quantifies short-circuit current reduction between a clean reference panel and a soiled test panel — simultaneously — deriving instantaneous and daily average Soiling Loss Index values per IEC 61724:1-2021 Annex C.
Dust. Sand. Bird droppings. Pollen.
The deposition of contaminating agents on solar panel surfaces hampers power plant performance. Without quantification, soiling loss remains invisible — and unmanaged.
ARN-SIMS100 makes soiling loss measurable, real-time, and actionable — enabling O&M teams to manage and enhance PV power plant performance with data-driven precision.
Measurement Method
IEC 61724:1-2021 Annex C — Short-circuit current reduction using a clean and soiled PV reference device pair
Maximum short-circuit current. Full surface area receiving irradiance. Baseline reference state.
Dust, sand, and airborne particulates begin accumulating. Partial shading of active cell area. Measurable Isc reduction.
Significant surface contamination from prolonged exposure. Substantial performance degradation. Immediate O&M intervention required.
Simultaneous measurement. Algorithmic precision.
The ARN-SPIM2000 interface device measures short-circuit current of both clean and soiled panels simultaneously, with RTD PT1000 module temperature data, to compute the Soiling Loss Index.
ARN-SPIM2000 simultaneously measures short-circuit current from clean reference panel and soiled test panel.
RTD PT1000 Class A sensors on the back of both panels provide module temperature for correction.
Onboard algorithm computes instantaneous Soiling Loss Index and daily average for fixed and tracker systems.
Data logged to SD card and transmitted via Modbus RTU/TCP, LTE, Wi-Fi, and Ethernet simultaneously.
IEC 61724-1:2021 Method 2 — Clean & Soiled Panel Pair
ARN-SIMS100 uses the ARN-SPIM2000 interface device to simultaneously measure the short-circuit current (Isc) of both the clean reference and soiled test panels. This data, combined with module temperature readings, is processed through an algorithm to derive instantaneous and daily average soiling loss index values.
Everything you need to measure and manage soiling loss.
System compliance as per IEC 61724-1:2021 — Measurement method 2, Short-circuit current reduction due to soiling (Annex C).
Real-time instantaneous Soiling Level Index with 0.01% resolution, enabling continuous monitoring of panel contamination.
Daily average Soiling Index calculated for both Fixed and Tracker-based PV systems for comprehensive performance analysis.
Connectivity over Ethernet, Wi-Fi & LTE(4G)/UMTS/GPRS — real-time data transmission from any remote plant location.
Seamless data connection to SCADA systems over RS485 Modbus RTU and TCP/IP for full plant integration and monitoring.
Onsite PV modules can be used to calculate accurate soiling index, eliminating the need for separate reference panels.
Time synchronization via GPS and internet ensures precise timestamps across all logged soiling and temperature parameters.
Intuitive configuration interface for rapid deployment and setup in the field with minimal expertise required.
Designed for simple installation and maintenance, minimizing downtime and reducing O&M costs at solar PV plants.
From measurement to plant decision.
Cleaning schedules driven by data, not guesswork
ARN-SIMS100 provides the O&M team with real-time soiling loss values, enabling cleaning interventions precisely when — and only when — they are economically justified. No more calendar-based schedules.
Quantified loss. Proven output.
Transform soiling from an unknown variable into a measured, reportable performance parameter for plant owners, EPCs, and asset managers.
Plug into your existing plant ecosystem
RS485 Modbus RTU/TCP connectivity ensures ARN-SIMS100 feeds soiling data seamlessly into existing SCADA and plant monitoring platforms.
Technical Specifications
ARN-SIMS100 Datasheet · Version 2.0.0 · August 2025
Panel Wattage
Up to 1200 W
Short-Circuit Current (Isc) Range
0 – 20 A
Shunt Accuracy
±0.05% FSD
Soiling Leveling Index Resolution
0.01%
Field-proven at infrastructure scale.
Deployed across utility-scale solar assets spanning multiple geographies and climate zones — from tropical archipelago to hyper-arid desert environments.
Ground-mount utility-scale PV installation in Central Luzon region. Tropical climate conditions with seasonal dust and humidity variation.
ARN-SIMS100 deployed for continuous soiling loss monitoring across the plant.
Large-scale desert solar IPP in arid central Arabia. High ambient dust loading from sand storms and dry desert wind.
Real-time soiling index critical for O&M scheduling in extreme desert environment.
Mohammed bin Rashid Al Maktoum Solar Park phase, Al Qudra Road. High-performance requirements for utility IPP compliance.
Soiling loss data feeds directly into plant performance reporting and cleaning operations.
Two configurations. One measurement standard.
Same precision measurement — select the configuration that fits your installation.
Without soiling panels and mounting structure. Uses existing onsite PV modules as reference devices.
With dedicated 75W soiling panels (×2) and mounting structure. Fully self-contained, installation-ready.
Made in India · IEC 61724-1:2021 Compliant · Version 2.0.0 · August 2025 · Custom configurations: [email protected]
Integrate soiling intelligence into your plant operations.
Talk to our field engineering team to discuss deployment architecture, SCADA integration, and system configuration for your specific plant and climate conditions.