150A High Precision Power Analyzer Multi Meter for Measuring Power Watt (W) Voltage (V) Current (A) Charge (Ah) Energy (Wh)

This works very well, but depending on how you use it, you will need to add connectors to the wires. I am using this to track the power generated by my solar panel going into a power station. Given this, I needed to also acquire a set of MC4 connectors along with spanners to properly secure them. You need to understand how to add the connectors and which connector goes on which wire. Do your research and locate a few YouTube videos on this. The video "The Easy Way To Install New Solar MC4 Connectors" by Everyday Solar is really good, but you still need to properly match up the wires to your devices so that you put the correct connectors on each wire. Yes, I am repeating this because it is VERY IMPORTANT. Look at what you will be using this meter with and layout the correct connectors BEFORE crimping. While you could splice these into existing wiring, you would not be able to use this with different power sources. The instructions are also a bit incorrect. With respect to the display, the cycle of items that change is "Ah, Wh, Ap, Vm, then Wp". The diagram in the directions is correct but the explanations are not in the same order. With that said, this meter works great!!

Didn’t work for my application but looks like a great product

Worked fine until I exceeded the voltage limit. Max voltage of this unit is 60V, which is fine for a single solar panel, or a few panels in parallel. I used this on a 2S3P panel array (120VDC), and it stopped displaying the measurements but still allowed current to pass through, however after a few weeks the unit seems completely dead and does not allow current to pass through anymore. I'd say it works as specified, and the way it died may be considered a safety feature? I sure wish it was specced for higher voltage.

This power analyzer seems to work well. I bought it to monitor battery use on my portable ham radio battery/power supply. It provides helpful information for me.

I am a solar DIY experimented. I test a lot of panels and battery combinations. This unit is a good buy and excellent instrument for quick down and dirty measurements. Not the most accurate meter in the world but commensurate with the cost it gets the job done.

Volts, amps, watts are quite accurate for the price, within 0.5% on amps and 0.3% on volts for mine (relative to an in-cal Fluke 289). Everything else about it is trash. The amp-hour and watt-hour measurements are off by at minimum 6%, and 17% (amp-hours) and 41% (watt-hours) low at 30A. I fed it with a constant current supply and external meter/shunts, from 100mA to 30A in a few steps. Because its error varies with current, there's no way to "just add 8%" or similar. It's likely within 20% at reasonable currents, but that's really not useful. You could know battery state of charge more accurately with a voltmeter from 1908 than this thing. Safety 3rd -> This thing is a fire hazard to anyone non-technical enough to believe the lies, so don't. 150A would absolutely melt this thing. If you buy one of these because $ alone, test it for longer duration and higher current than normal usage before leaving it alone. This is deceptive false advertising at best, like probably half the garbage sold now.. The shunt resistor is 1 milliohm, 5% tolerance, and inline with the negative lead. Given its size, it is rated at most 4 watts based on datasheets of similar. 150A through that is 22.5W, so it's overrated by 5.5 times. The positive lead is straight through, you can hook either end of it to your power source and cut off the other if more convenient. The "manual" says it works on 5v, but the screen doesn't work until ~8v. The manual says nothing about how to connect auxiliary power (the pinout of the 3 pins), or what connector to use. Soldering is marginal at best. It's likely variable between units, but the one I got was near-melting the wire/board/shunt solder joint at 30 amps. If voltage drops to a certain range then comes back up, it locks up and requires a full power cycle to work again. Real simple to fix this in circuit design. There's zero strain relief on the wires. If you pull on them much, they're coming off the board. Overall it's a volt/amp/watt meter for <30A, that's it. There are probably much more durable and safe versions of that for similar cost.

I bought this for a little solar test rig for checking small panels and charge controllers. It seems to work well and the readings are consistent with the values I am getting from my charge controller in terms of voltage and current, so I expect the power readings to be accurate as well. I have two concerns, one of which is large. The smaller concern is the length of the pigtails coming from the meter. They are about as long as the picture in the description, only 2-3 inches, so there is not much room for attaching them. This makes things difficult. I used butt-spices to attach them to longer wires with SAE connectors on both ends. My larger concern is the rating. The description says that it is rated for 200 amps. I doubt any 12-gauge wire would put up with 200 amps for any length of time. calculations show that 1 AWG could be required. 12 gauge wire is suitable for 20 amps, not 200. I don't know if the description is wrong, or just wildly optimistic. For my intended purpose (less than 20 volts, and less than 60 volts), it should be suitable, and is worth the cheap price.

I can observe in real time the voltage and wattage coming from the solar panels. Great for troubleshooting. The only thing you have to do is attach the proper connectors for in line monitoring. This is a must have.

Very happy with it. Have hooked up to my car fridge.

I built a portable 12V battery box using the ECO-WORTHY 30Ah LiFePO4 battery, ECO-WORTHY 20A LiFePO4 charger, Powo Charlie waterproof battery box, and added a 150A high-precision power analyzer as a charging and load monitor. This combination works extremely well as a compact, reliable power solution. The ECO-WORTHY 30Ah LiFePO4 battery delivers steady, clean power and the built-in BMS provides peace of mind against over-charge, over-discharge, and short circuits. It’s lightweight yet powerful enough to run radios, accessories, and small DC loads for extended periods. The ECO-WORTHY 20A smart charger pairs perfectly with the battery. Charging is fast, safe, and automatic, switching to maintenance mode once full. The Anderson connector makes setup simple and secure. The Powo Charlie battery box ties everything together nicely. It’s rugged, waterproof, and fits the 30Ah battery perfectly. The built-in Anderson plug, 12V outputs, and dual QC3.0 USB ports make it extremely convenient for portable use in camping, RV, ham radio, or emergency setups. Adding the 150A high-precision power analyzer really completes the project. It provides real-time monitoring of voltage, current, power, and amp-hours, which makes it easy to track charging status and power consumption. This is especially useful for LiFePO4 batteries, helping avoid over-discharge and giving a clear picture of remaining capacity. Pros: • Reliable 30Ah LiFePO4 battery with BMS protection • Fast, safe, and automatic 20A LiFePO4 charger • Rugged, waterproof battery box with multiple outputs • High-accuracy 150A power analyzer for real-time monitoring • Anderson connectors make wiring clean and modular Cons: • Charger fan can be slightly noisy during fast charging • Power analyzer requires careful wiring for accurate readings Overall, these components complement each other perfectly. Together they form a portable, well-protected, and fully monitored battery box system that’s ideal for camping, boating, ham radio operations, or emergency backup. Highly recommended as a complete setup.

Does not work well with pulsing load, display goes blank when using load with pulsating higher current. Leads are way too short, so it's hard to solder to them. It works and it's good for the price however if you buy, I'd recommended crimping on wires instead of soldering since the wires coming out of the box are so short.

Not yet thank you.