Best Industrial Power Meters of 2025

"I own several Klein and Fluke testers, but I appreciate this tool's inexpensive and battery-free design. It gives accurate measurements and is perfect for quick checks without the hassle of batteries. My only minor annoyance is that it resets to watts when unplugged."

"I wanted to monitor my computer's power usage. This device delivered exactly what I needed. It's easy to use, and it shows me the wattage effortlessly."

"This Watt Meter is a fantastic addition for checking energy costs. I discovered that my ice maker costs about $5 a month to run. It shows more than just total kWh, and I love using it for my energy calculations."

"I consistently test various devices, and I get reliable wattage readings close to what's stated on the packaging. The bright display is a plus, too. I appreciate its size, as many products are too small these days. I bought two and plan to order another!"

"Using this tool helped me find an energy vampire in my home. It accurately monitors energy consumption, making it a must-have for hobbyists like me. It's plug-and-play, and the dim feature is handy. I can track usage over specific time frames, and the cost per kilowatt hour can be calculated easily. For under ten bucks, it's a great gadget!"

"I love this product! The backlighting is a game changer compared to others I've used, and it's affordable enough to buy multiple units. I can set overload warnings, and it remembers my settings even when unplugged. While it's not safety certified, I still feel it's a solid choice for monitoring."

"I find this USB power meter very handy for testing the output of USB ports, especially when inspecting RVs."

"As someone who has used Klein tools before, I can say this meter is made to high standards. It's worth the slightly higher price."

"Using this meter has been a game changer for me. I love that it offers both USB-A and USB-C, making it incredibly easy to check charge and discharge of my devices without complicated button pushing."

"I bought this simple device to get an idea of my electrical consumption for sizing my generator. I can identify usage for each appliance, which is valuable for a backup battery system in the future. It works well for my needs, and I found it to be a better value than other more expensive adapters. However, the display orientation is not ideal for use with a power strip."

"I recently purchased the Upgraded Brighter LCD Display Night Vision Power Meter Plug, and it has been a game changer for monitoring my energy consumption. The display is bright and clear, and the night vision feature allows me to check usage even in the dark. It's easy to use and very accurate, providing real-time information to help me adjust my usage. I'm extremely satisfied and would highly recommend it!"

"This little product is a massive upgrade over non-backlit competitors. It helps me monitor the power draw of my devices, like my custom PC that pulls 1200 watts. I appreciate knowing if I can add more devices to the circuit. My only minor disappointment is that the backlight isn't always on, requiring interaction to light it up."

"I recently bought this to monitor the power consumption of my portable AC as a backup to my central air system. It's been working perfectly for about six weeks, and I'm impressed with the easy programming for local utility costs, providing daily and monthly estimates."

"I purchased this to determine how much power my older refrigerator uses. It works well, and I'm excited to use it for other appliances."

"I bought three of these to track the energy consumption of my window air conditioners in an older home. Although I initially had high hopes, I found the monitor cable to be shorter than expected. However, I'm making them work with some creativity, as my past experiences with P3 products have been great."

"I appreciate this model for its power strip-like design that makes it easy to use while testing equipment power parameters. It shows watts, voltage, amps, and power factor, and is very accurate, closely matching my Fluke meters. I only wish it displayed VA (Volt Amperes), but that's easy to calculate. For just 30 bucks, it's a fantastic price and performs well. I highly recommend it!"

"This device has worked well for me in measuring the power consumption of our Freeze Dryer. The calculations are straightforward, but using this with multiple devices saves me from doing the math. My only minor issues are that the power cord is a bit short and the readout isn't backlit. Nonetheless, it's still a great little device."

"I purchased this to check the power usage of my audio system and it does provide real-time readings. However, it’s hard to read because the numbers fluctuate with the music. I suggest adding peak/average power modes for more stable readings. I also think it needs a lit OLED screen for better visibility. The cord is too short, so I had to buy a 3ft extension cord just for this."

"I recently bought the Makerfire 200A Upgraded Watt Meter for my solar off-grid setup, and I’m thoroughly impressed! The longer wire design is a fantastic upgrade, providing flexibility during modifications. Its high accuracy for voltage, current, and power measurements is essential for monitoring my solar system's performance. Plus, the LCD backlight is a lifesaver in low-light conditions. Overall, it's a top-notch tool for solar installations, and I highly recommend it!"

"I use this watt meter to monitor my electric vehicles’ performance. Recently, I checked my skateboard’s battery health by discharging it through this meter, and it effectively tracked all necessary data for my calculations. I’ve been using it for over a year now, and my only concern is that the display cover may not protect the LCD well enough, as my previous one got damaged by a stick while riding."

"I had been looking for a meter with longer leads, and this one fits the bill perfectly. The light background screen with dark characters is much easier to read compared to the typical inverted screens. So far, it works well and shows accurate power measurements similar to my other meters. However, I suspect the specs may be a bit overrated; I plan to use it with lower expectations."

"I'm buying another one as a spare. It's very light, compact, and features a genius build. The measurements matched closely with my Bird meter, and it's great for rough handling."

"This meter is the best for the price. A friend who typically buys high-end equipment was impressed by its accuracy."

"Finally, an affordable SWR meter for HF radios. It works well and is very close to the readings of higher-end meters. The only downside is that it needs an external power source, but it’s not an issue for me."

"I appreciate that this item is rated for 50Hz, so it might work well for specific applications."

"The 50Hz rating could be beneficial if I travel internationally, but I need to be cautious about compatibility."

"As a satisfied user of the Poniie PN1500, I highly recommend this monitor for effectively managing electricity usage. Its lightweight and portable design allows for easy movement around the home, and the real-time monitoring is impressive. The large LCD screen provides clear electricity usage data, making it easy to track and adjust my energy habits. Overall, it's a reliable and user-friendly tool for reducing energy bills."

"I absolutely love this device! I've had a similar product before that did not work well for me, but so far, this meter reader works perfectly. It's very accurate, easy to read, and the brightness of the display is just right. I am really pleased with my purchase!"

"This monitor is a great way to discover how much power my appliances waste when left on. I found several devices consuming hundreds of watts, which helped me cut almost $100 off my monthly bill. My little mini fridge was using 3 to 4 times the power of my main fridge, and I realized leaving printers on standby takes about 12-20 watts. This device has already paid for itself multiple times!"