Clamp-on multimeter for testing photovoltaic DC power

Clamp-on multimeters like the Megger DCM1500S and BENNING CM 10-PV are ideal for safely measuring DC voltage and current in photovoltaic systems up to 2000 V DC.

Key Features for PV Clamp Meters

When testing solar panels, a clamp-on multimeter should have the following capabilities: High DC voltage range: Essential for PV strings, typically up to 1500–2000 V DC.

High D

C current measurement: Many PV systems require clamps capable of measuring hundreds of amps safely.

True RM

S measurement: Ensures accurate readings on non-linear loads. Safety ratings: CAT III or CAT IV ratings for PV systems to protect the user. Additional functions: Resistance, continuity, diode testing, capacitance, frequency, temperature, and inrush current measurement can be useful for troubleshooting.

Data logging and connectivity: Some meters offer Bluetooth or app integration for remote monitoring and trend analysis.

Recommended Models

Megger DCM1500S Solar Clamp MeterMeasures up to 2000 V DC and 1500 A AC/DC. Includes resistance, diode, capacitance, temperature, and frequency measurements. Features a backlit display, automatic torch in the jaw, and Bluetooth connectivity for remote monitoring via the Megger Link App.

Ideal for installation, maintenance, and monitoring of PV systems.

BENNING PV Current Clamp Meter C

M 10-PVTrue RMS clamp meter designed for photovoltaic systems. Safe voltage measurement up to 2000 V DC and 1500 V DC with protective caps.

Includes P

V connectors and 4 mm measuring tips for direct contact with PV generators. Suitable for service, industry, and HVAC applications as well. Fluke 115 Digital Multimeter (for general PV testing)Measures up to 20 A (momentary) and True RMS for accurate readings.

Large LE

D backlight for poorly lit areas. Versatile for electricians and PV maintenance tasks.

Usage Tips

Always measure voltage first before clamping for current to ensure safety. Use meters with high DC voltage ratings to avoid damage or injury. For detailed PV performance analysis, consider combining a clamp meter with IV curve tracers or irradiance meters.

Ensure the meter is rated for the specific PV system category (CAT III or IV) to comply with safety standards. Using a clamp-on multimeter with these features allows technicians and DIYers to accurately monitor, troubleshoot, and maintain photovoltaic systems, ensuring optimal energy output and system longevity.