Yunsailing 2 Pcs 200A High Precision Watt Meter Power Analyzer Battery Consumption Performance Monitor Amp Meter Monitor with Backlight Digital LCD Screen for RC Solar Voltage Current Power (60V)

The accuracy of it and small compact affordable and works great I'm just glad I've got what I needed. And trust.

I'm a retired electronics technician. I've built an electronics bench here at home to design, build and test all things electronic. These two in line watt meters work great, and at a very good price. Along with other test equipment, I've integrated one of them into my electronics bench here for quick and dirty voltage, amperage and wattage reading. Simply attach a source and a load and you're in business. To be honest, if I compare these to my Fluke 87 voltmeter or amperage measurement, they are not dead on. However, never off by more than a percentage or so. That does not present a problem for me, as I would not expect something this inexpensive to be super accurate. It wasn't designed to compete with more expensive dedicated measuring equipment. Five stars and I would recommend for any electronics enthusiast.

The meter performs OK but the display is hard to see outside and wish the cable was longer.

I got these to test several different solar panels I have been testing for different manufacturers. I love having these to generate another data point that I can use to check against my MPPT tester, volt meter, Amp meter and other components that might be wired into the panels that I'm trying to gather data on.These Watt Meters come with non-terminated ends (bare wire), so be sure you have the ability to add your own terminals.If you are running more than a 2-3 solar panels, I would highly recommend getting a set of these just for peace of mind that your panels are working as intended.

Great for analyzing battery condition and charger performance

I was on my 5th copy of these 200A meters until last night, the last one died, exactly as the previous 4 did. You get roughly 1-2 hours of screen-on runtime, before the screen itself stops functioning.Electrically, the meter and the cabling for source and load ends works fine, power flows across the leads, but the display is dead, not a single backlit pixel.Every single one of these has dies in exactly the same fashion for me, when used to measure the voltage and current across a portable solar array on my back deck and my Bluetti AC200MAX.I know the current was not higher than the rated capacity of the meter and these solar panels don't even come close to generating a high enough current, but the display itself, or the components powering the display just die within 1-2 hours of continuous runtime.I'm now seeking another, better meter to replace this capability. If anyone knows of one, please let me know.

I have no idea as to the accuracy of this meter since I haven't put it into use just yet, but beware: if you plan to add power poles or other attachments to the pigtails, you have very little room to work with as the pigtails are extremely short. When I get the chance, I'll be removing the existing wires and soldering in longer #12AWG pigtails to suit my needs.

I’m amazed at the sorts of digital hobby tools available today at low cost. This is a great piece of kit for load testing, voltage and current monitoring. I bought the 200a version and it was nicely stated that it’s effective load is a good bit less, which I mention as some reviews question the rated current advertisement.I attempted to use on inline with a 10a noco genius battery charger for lead acid / agm. The noco could not get a fix on the battery and kept sending its “discovery pulses” to see what was on the other end of the wire. After a few minutes of fiddling, I cut it out of the circuit and dismounted it from the charging panel I fabbed up. I should have tested it first before doing all the mounting work.Not the device’s fault at all. Seems like a great tool, just not with a charger that needs feedback back from the battery.