Makerfire 200A Upgraded Watt Meter with Longer Wire, High Precision Power Analyzer Battery Testers Voltage Amp Consumption Performance Monitor with LCD Backlight Screen for RC,Solar,Wind Power,Ebike

I recently purchased the Makerfire 200A Upgraded Watt Meter for my solar off-grid installation, and I must say, I'm thoroughly impressed by its performance and features. Firstly, the longer wire design is a significant upgrade. It offers more flexibility during modification and testing, allowing for a more convenient setup. This design consideration shows that Makerfire understands the needs of its users. The precision of this watt meter is remarkable. It measures voltage, current, and power with high accuracy, which is crucial for monitoring the efficiency and health of my solar setup. I've compared it with other meters, and the Makerfire consistently provides reliable and consistent readings. Another standout feature is the LCD Backlight Screen. It's clear, easy to read, and the backlight is a godsend in low-light conditions. This makes monitoring my system's performance hassle-free, regardless of the time of day. As for its power consumption and performance monitoring capabilities, the Makerfire 200A Watt Meter has been invaluable in optimizing my solar installation. It's helped me understand my system's output and consumption better, allowing me to make informed decisions to improve efficiency. Durability-wise, the meter feels robust and well-built. It gives me confidence that it will withstand the rigors of regular use in an outdoor environment. Overall, the Makerfire 200A Upgraded Watt Meter is a top-notch tool for anyone involved in solar installations or any application requiring precise power monitoring. Its combination of accuracy, ease of use, and robust design makes it an excellent investment for both professional and hobbyist use. Highly recommended!

Works great

This power meter is easy to install. I put 3 on the output of my solar controllers. The 3rd one I installed had the front label on wrong. The Load and Source was backwards. The Source always goes to the end with the small 3 prong plugin. One of the 3 had that labeled as the load. But hey they work well and are easy to read. Only gripe is you cant reset the meter readings.

I bought a low end 13.8 V power supply that did not have any kind of meter. So I wired this in line. Worked very well for my purposes. The biggest problem is that the gauge of the wire is much smaller than the outside diameter of the insulation, which made it difficult to use crimp connectors, and it’s aluminum wire so you can’t solder to it. It was a struggle getting the ends on, but once that was done I did not have any further problems. If you can make this work with screw down connectors (like a terminal strip) it would probably be a lot easier to use.

I use this to measure performance on my little electric vehicles to see how the battery is doing and my efficiency. I recently used it to check the battery health on my electric skateboard by discharging the battery into a resistive load through it and then measuring the energy it took to charge from empty to full. It tracked and recorded all the data I needed to calculate the health of my battery when compared to its rated capacity. I’ve been using this for over a year and my only complaint is that the display cover may not protect the lcd as my old one was hit by a stick while riding which destroyed the screen.

This unit had potential - for example, the backlit yellow/green display is beautiful - and the manufacture did make the crappy CCA wires a tiny bit longer - and added some vent holes to help keep it from melting down (with a warning NOT to run more than 50 Amps on your "200 Amp Makerfire" meter unless you want to MAKE A REAL FIRE) -- but it's pretty obvious that they did ZERO overall QC testing on the design because there are some really silly-stupid issues that would have been easy to fix - but they just didn't bother. The first issue is the accuracy for current (A) measurements below about 1 Amp is REALLY BAD. The lower you go the worse it gets, with the reading going to ZERO when there is still over 100mA flowing. This offset error won't create a huge error if you are measuring 10A - 20A flowing in a fairly high power circuit, but at high power levels the accuracy of the internal current shunt starts to become an issue, all of which makes the meter pretty much useless for any kind of high accuracy current measurements. This also trashes the power measurement accuracy since the reported power is calculated using these inaccurate current readings. That's really bad, because despite their "vent hole upgrade". I don't consider this meter beefy enough to be used for full time high-power measurements like monitoring scooters, e-bike, or high power RC motors - so if you need to measure really high power - BUY SOMETHING ELSE - and because of the above current measurement issues, if you need to make ACCURATE measurements of current, or power, even at lower power levels - BUY SOMETHING ELSE. -- So pretty much -- JUST BUY SOMETHING ELSE. -- and If the inaccuracy issues weren't enough to convince you, there is also the fact that some of the measurement functions on this meter are just TOTALLY BROKEN (another indication that they did pretty much ZERO QC testing on the design before shipping this "upgraded" version). For example, when you power the unit on, it stupidly measures ITS OWN TURN ON SURGE - and reports this bogus value as "Amps Peak" and "Watts Peak". This can be as high as 15 to 17 Amps, and OVER 200W "Watts Peak" -- EVEN WITH NO LOAD CONNECTED AT ALL. What turns this from an annoyance into a major usability issue is that there IS NO RESET BUTTON so you can't reset this bogus "peak" reading, because the only way to reset the value is by disconnecting the "source" side power, and reconnecting it - AT WHICH POINT IT REPEATS THE STUPID BOGUS SURGE MEASUREMENT OF ITS OWN TURN ON SURGE - So effectively you can't measure an "Amps Peak" (Ap) or "Watts Peak" (Wp) value at all unless your external load surges ABOVE these high built in background noise levels after it is connected. Dumb, really, really, REALLY DUMB. All they would have had to do was NOT enable the surge measurement feature for a few milliseconds after power-up to let the circuit stabilize and everything would have been fine. Measurements of REAL SURGE AMPS would not have been effected, because the meter could still measure the CORRECT surge value when the customer connects the LOAD SIDE (which should be connected after the 'source' side is connected anyway). So this supposedly "upgraded" version suffers from poor current measurement accuracy, and several outright broken measurement features. If this is the "upgraded version", I would hate to see what it was like before the upgrade.

Purchased 3 of these in order to monitor power output from solar panels. It is not what I expected. The display constantly cycles through data measured with no way of pausing the display. I can live with that. My biggest problem is that if the solar panel should temporarily stop putting out power due to shade or clouds, the meter turns completely off and then starts up again when power is restored, but all data collected is lost and there is no way to retrieve it. There are a lot of other watt meters on Amazon that is similar to this one but less expensive. Will return and keep searching for a watt meter with the features that I am looking for.

I might be too picky in this review but it works very well you have to have a good soldering technique to solder on your connectors because 12 gauge wire gets a little tricky with the heat The cheap part that I don’t like and I bought two of these hoping the second one would be different and it was not is “the plastic face is a very thin thin piece of plastic that Glooze around the edges and it bubbles up half of it comes off and it’s very hokey I bought another brand from tool kit RC it’s 150 amp watt meter, it has a pop out dial where you can increase the voltage going in and get different readings it has a graph and a dial it’s by far the best one on the market but it was about $50 but if you’re serious about your plans it’s a great bye, this particular wattmeter here is just not something I would buy again just for the fact of the face plate is a cheap thin plastic film that does not lay flat and secure