Makerfire 200A Watt Meter, Battery Testers, for RC, Solar, Wind Power

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 good, no issues

bought five of another brand, all five don't give me the information I needed, Total watts. they were either off by a large amount on did not work at all. three out of five gave me voltage, the other two nothing. This time I orderee one, and it seems to work finve after four days so got too more.v If your looking, try ONE of these first. I am not going to bogther returning the others.. Amazon Doesn't follow ISO on its products, and if you return too much, they cut you off. best just to eat the junk. UPDATE 0822 test one of the two , it did fine, put both of them together, didn't test the other one. Today the first one seemed to die. I had switched to a pararelle connection. checked both of the other two, one of them was DOA, the other one was fine. Used a 60W panel to test, then switched to the 360( neither connected to gen) at first the #1 did nothing connected, but then came back to life. Checked against the Paraelle connected panels, and it died, but liked the single 60w fine. Is it the paraelle panels, re doing my panels for serial, will up date later

Perfect - High visibility display which is better than the rest. Great value

It worked 35 days then failed. Update, system took a lightning strike . Ironically, the meter is fine.

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.

Described as having longer wires for connection. Not so, only about an inch longer that a similar device I bought a couple years back. Also I wouldn't try anything close to 200A through this device, the wire is too small for that and would create a significant voltage drop. Might make the wires dangerously hot. For use around the ham shack measuring current up to 30-40A, it meets my needs and matches current/voltage measured with pro equipment I have. Note that this unit is provided without connectors of any kind. The wires are stripped and tinned,, but you must supply your own connectors for your application.

I love this unit. Very accurate. Yellow background makes it easy to see. I have 5 across my build. The wires and box heats up with a consistent 50 amps. Wires have made it to 118 degrees. No melting, just softness.