KETOTEK Digital Ammeter Voltmeter AC 80V-300V 100A, 2in1 Multimeter Panel 110V/220V, Volt Amp Meter LED Display Voltage Amperage Detector Tester Gauge with Current Transformer CT

I installed these to Monitor, a whole Home UPS running 240 V.In addition, I can also Monitor the 120 side for my generator to ensure that I’m not overloading itThese are bright, easy to read. Even pull daylight, and will Monitor, Your kilowatt hours, If need be, they have an excellent, so far after almost a year of constant use

I bought this unit to see how well Texas' now-notorious electrical grid is keeping up with demand during this arctic weather we are having here at the moment. Line voltage and line frequency both 'sag' when generators are struggling to keep up with demand, but so far so good (fingers crossed). I have also been monitoring the U.S. Grid via FNET's website which shows the instantaneous frequency in various U.S. regions, and this little meter is accurately tracking these changes (to one decimal place) as they occur in Texas' grid.Technical note: this meter truncates the frequency measurement at the first decimal. It does not round the value, and so if the line frequency is, say, 59.999... Hz, it displays 59.9 Hz, not 60.0 Hz. This is preferable because otherwise the frequency would always display 60.0 Hz except in cases of a serious grid fault. Line frequency typically varies less than 0.01% under normal conditions.Very nice little meter. Accurate, looks well made and has a nice, bright display, all at a great price. A solid five stars for this product.

I added this to my backup generator to indicate that everything is operating as it should. Works great!

The vendor initially shipped the wrong unit, a Volt/Hz meter, I returned it and received the correct Volt/Amp meter. I have installed it and connected it to a Balanced Power Isolation Transformer to monitor the output load. The voltage readout appears be be correct. I have no way to independently verify the current reading. The vendor claims that the unit works with both 50 and 60 Hz AC power. I'm a little suspicious that it can be accurate for both frequencies. Nonetheless, I wasn't expecting a laboratory grade meter and am satisfied with the performance. It was a perfect size to install in a 1U NEMA rack panel.

I added one of these meters to an electrical sub panel in my workshop to monitor current usage and voltage when I'm running my power tools. This meter works very well, was easy to install, and is easy to read from across the room. I haven't verified its accuracy with my multimeter but it gives consistent and reasonable readings.

Great meter for my home project very accurate as well.

The media could not be loaded. I installed this in our camper. Installation was simple and straight forward. I have used several of these in the past and have always been pleased. Please see my attached video. Thanks!

Use this with my generator. Works great. Makes it easy to track what my usage is in amps and that the generator is maintaining an acceptable voltage.