Solar Power Clamp

Solar Power Clamp

Power analysis tool for PV installations

The Solar Power Clamp is a feature-packed Power Analyzer designed to enable efficiency measurements, troubleshooting and maintenance of photovoltaic systems.

DC power measurement
AC and AC+DC true continuous power (RMS) reading
Power Factor
Total harmonic distortion and harmonics 1 - 25
Phase rotation indication
Measure current and voltage
Smart data hold and peak hold
Voltage Indicator
Non-contact voltage indicator

About the Solar Power Clamp

The Solar Power Clamp is especially designed for installers and technicians interested in power measurement and analysis on AC & DC systems and carrying out diagnostic checks.

In order to ensure the maximum yield from a PV system it is important to check the efficiency of the conversion of DC power generated by the PV modules to AC power fed into the electrical installation. Efficiency is determined by measurement of both the voltage and current on the DC and AC sides of the inverter and using the measured values to calculate the DC and AC power. Alternatively, the DC or AC power can be measured directly on either side of the inverter in seconds using the Seaward Solar Power Clamp. The Power Clamp simply clips over the cable to measure current and the supplied in-line connectors can be used to measure the DC voltage whilst the PV modules are connected to the inverter, giving an accurate true RMS reading of the power whilst the system is operational.

The Solar Power Clamp can be used when installing a PV system to ensure the inverter is operating correctly or for maintenance and troubleshooting on the PV system after commissioning. If a PV system isn't generating the expected level of power under known irradiance and temperature conditions, this may indicate a fault with one or more components in the system.

Similarly, the presence of harmonics on the AC output of an inverter may indicate a fault within the inverter. In addition to power and efficiency measurements, the harmonic analysis function of the Solar Power Clamp can be used as a means of detecting faults within the inverter.

As PV systems have a lifetime of over 25 years, periodic inspection and testing is necessary to ensure that they are operating efficiently. Most inverters have a lifetime much shorter than that of the entire system and so require particular attention as part of system inspection and testing, to ensure optimal system return on investment and power output.


Active Power

Function Range Accuracy
ACW / DCW 0.000kW – 599.9kW A, error*V, reading + V, error *A, reading


Function Range Accuracy
DCV 0.00 – 999.9V ± (0.7% + 2dgt)
ACV 0.00 – 999.9V ± (1.0% + 5dgt)
LPF (ACV) 0.00 – 999.9V ± (1% + 5dgt) @ 50Hz - 500Hz
± (5% + 5dgt) @ >60Hz - 400Hz
Resolution (all) 0.01 V  


Function Range Accuracy
DCA 0.00A – 99.99A 100.0A - 599.9A ± (1.5% + 0.2 A)
± (1.5% + 5dgt)
ACA 0.10A – 599.9A ± (1.5% + 5dgt) 50Hz - 60 Hz
± (2% + 5dgt) >60Hz - 500 Hz
LPF 0.10A – 599.9A ± (1.5% + 5dgt) 50Hz - 60 Hz
ACA   ± (5% + 5dgt) >60Hz - 500 Hz

Peak Hold: Peak Max / Peak Min

Function Range Accuracy
ACV 140.0V 140.0V ± (3.0 % + 15dgt)
ACA 140.0A 850A ± (3.0% + 15dgt)


Function Range Accuracy
Frequency 20.00Hz - 9.999kHz ± (0.5% + 3dgt)

Total Harmonic Distortion

Function Range Accuracy
ACA /ACV 0.1 – 99.9% ± (3.0% + 10dgt)
Resolution 0.1%  
Harmonic Order Range Accuracy
H01 ~ H12 0.1 – 99.9% ± (5% + 10dgt)
H13 ~ H25 0.1 – 99.9% ± (10% + 10dgt)
Resolution 0.1%  

Inrush Current

Function Range Accuracy
ACA 0.00A - 99.99A
100.0A - 599.9A
± (2.5 % + 0.2A)
± (2.5 % + 5dgt)

Power Factor

Range -1.00 - 1.00
Resolution 0.01
Basic Accuracy ± 3°± 1dgt

Resistance, Continuity & Diode

Function Range Accuracy
Resistance 0.0Ω - 999.9Ω
1.000 kΩ -99.99 kΩ
± (1.0% + 5dgt)
± (1.0% + 3dgt)
Continuity 0.0Ω - 999.9Ω ± (1.0% + 5dgt)
Diode 0.40 ~ 0.80V ± 0.1V


Function Range Accuracy
Capacitance 0.000 μF - 4000 μF ± (1.9% + 8dgt)
Resolution 0.001 μF max  


Safety IEC 61010
Power Requirement Single 9V battery
Battery life ~ 100 hours (alkaline battery)
Size 87 mm (W) x 239 mm (L) x 51 mm (H)

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