Analog output solar reference cell 3S-WPVS

with mV outputwith temperature sensorfor photovoltaic systems

Product overview
The WPVS (World PV Scale Standard) reference cell 3S-WPVS is an irradiance sensor based on a monocrystalline silicon reference cell, designed for accurate measurement and calibration in photovoltaic test laboratories and solar simulator setups. It delivers PV-matched spectral response and temperature measurement to support standardized PV testing and quality control.

Key functions

• Measures irradiance using a monocrystalline silicon reference cell for PV-matched behavior.
• Measures cell temperature with an integrated PT1000 Class A sensor for temperature correction.
• Provides analog voltage output (mV) via a precision shunt resistor for datalogger and test system integration.
• Used for calibration of solar simulators and verification of PV module performance under STC.

How it works

• The monocrystalline cell generates a current proportional to incoming irradiance.
• A precision shunt resistor converts the current to a measurable voltage (mV).
• The PT1000 sensor positioned beneath the cell provides temperature data for correction.
• Irradiance and temperature signals are available on analog outputs for recording and analysis.

Available models
Model | Output Type | Connector
3S-WPVS-IV | Analog (mV) | M8 Metal Gland
3S-WPVS-L | Analog (mV) | Lemo EGG.0B.306.CLL

Optional configuration
The WPVS can be supplied in an albedo (two-sensor) configuration to measure plane-of-array (POA) and reflected irradiance simultaneously for bifacial PV systems and albedo-based performance calculations.

Typical applications

• Solar panel testing laboratories
• PV module manufacturing quality control
• Solar simulator calibration
• Research and development centers
• Bifacial PV performance and albedo measurement

Why choose WPVS

• High measurement accuracy: manufactured and calibrated according to IEC 60904-2.
• Traceable calibration: each unit calibrated under a Class AAA sun simulator using a reference cell certified by ISFH (Germany).
• PV-matched response: uses an actual solar cell for realistic comparison with PV modules.
• Durable anodized aluminum housing with IP68 options for indoor and outdoor use.
• Compact and lightweight design for easy installation and positioning.
• Simple integration via analog output and standard connectors.
• Flexible connector options: M8 or LEMO.
• 5-year warranty.

How it is used in practice

• Solar simulator calibration: positioned under the simulator light to measure irradiance; output (mV) is compared to the 1 sun reference (1000 W/m² at 25°C) and simulator intensity adjusted accordingly.
• PV module testing: installed adjacent to or coplanar with the tested module to provide continuous irradiance and cell temperature measurements for validation and correction.

Datasheet & calibration
Each sensor is calibrated under a Class AAA sun simulator in accordance with IEC 60904-2 and IEC 60904-4, using a reference cell calibrated by ISFH (Germany) to ensure traceability and repeatability.

Characteristics / technical specifications

• Item Code: 3S-WPVS-IV, 3S-WPVS-L
• Reference Cell: Monocrystalline Silicon (20 mm x 20 mm)
• Field of View: 162°
• Data Output: mV (via integrated precision shunt resistor)
• Electrical Connection: 1 m 2x2x0.22 mm LI2Y(St)C11Y-TP cable, UV and weather resistant (standard)
• Cell Temperature Sensor Type: PT1000 Class A (EN 60751)
• Connection: M8 connector (standard) / LEMO connector (optional)
• Box Dimensions: 70 x 79 x 16 mm (W x L x H)
• Weight: 250.8 g
• IP Rating: IP68 options
• Sensor Housing Material: Anodized Aluminum
• Compliant Standard: IEC 60904-2
• Calibration: Calibrated under Class AAA sun simulator per IEC 60904-2 and IEC 60904-4 using a reference cell certified by ISFH (Germany)