This monitor can show the voltage, current, and total power output in real time from any USB socket or DC power cable upto 50V.

• Shows readings in Volts (V), Amps (A), Power (W), Total Power (mWH or mAH), and Time Elapsed
• Includes detachable cables to connect to a USB socket, cable screw-clamps to connect a pair of DC cables, and voltage tester cables.
• Powered by a built in rechargeable battery and can be charged/powered from any USB socket. Does not use any power at all from the device being measured for the most accurate results.
• Backlit LED screen for use at night.
• Pause/Reset buttons to store the total power and time readouts.

The monitor is useful for a wide range of uses: it can help you angle a solar panel to capture the most energy, see how much capacity a battery pack really has, how much energy it takes to fully charge your devices, test your household or car batteries to see if they are close to dying, and test your USB cables to see if they are causing slow charging.

Click here to download the user guide. We also offer a more basic power monitor for use with USB sockets only - search for 'PortaPow USB Power Monitor'.

Specifications

Limits: 0-50 Volts, 0-5 Amps, 0-250 Watts, 99999Ah.

Resolution: 0.0001V,  0.0001A

Error: +/- <1%

Battery life: Approx 20 Hours, 4 stage battery meter.