DROK Volt Amp Meter, AC 500V 200A Digital Voltmeter Ammeter Panel, 0.39 Inches LED 2in1 Multimeter, 2-Wire Voltage Amperage Tester Gauge with Current Transformer

First off, kudos to the person who included the wiring diagram in their review. I was able to make sense of the one on the page, but that is a great simplified, concise version that was helpful and easier to view when wiring it up. I specifically purchased the 4.5-100VDC /0-50A meter. I do a lot of tinkering in general with circuitboards and DC voltage, but for some devices I would need to or may exceed the 10amp fuse on the meters I have that can measure DC amperage (and also, the ones that I do have some weird 10A fuse you can't just run out and get somewhere, go figure, lol) One such project was replacing the dead Ni-MH battery in an old cordless vacuum with something more modern and readily available. I found a power tool battery that would supply 24VDC and that was also capable of providing the needed amperage, which I'm running through a DC Buck converter with adjustable voltage and amperage. This meter allowed me to correctly measure the voltage and adjust the amperage amp by amp to insure I was only reaching the amperage the vacuum needed to run without going over. I look forward to wiring up a little 3d printed enclosure to install this into so I can use it more like a regular meter with my tinkering. Highly recommend.

This thing is great. It matches what I can get with my calibrated BK Precision bench meter to the precision allowed by the DROK meter, which is "good enough" for my hobbyist stuff. I do wish there were markings on the housing itself for which terminals were which; if you ever lose the decal off the back of the unit and don't remember how things are wired up, you may have a bad time. Terminal screws are non-removable...Not a big deal, but may be relevant to some users.

Works as advertised. Use the other reviewers diagram though. So much easier. Used this in conjuction with an automatic power switch module for my starlink (12v power supply) on my office trailer. Built it all inside a 3d printed box.

I needed a solution to monitor volts and amp draw for my generator that is connected to my main panel by interlock. I wanted a solution next to the panel instead of at the generator, with this I can see exactly what load I am putting on the generator as I turn individual circuits on. If you are not familiar with an interlock - it is an electrician installed lockout safety switch that requires the incoming MAIN circuit to be turned off before allowing the generator circuit to be turned on - which then provides power to the entire panel to the extent your generator can handle the load. My electrician installed a 30amp 220v circuit on the panel and the outlet outside the house as well as the interlock that is specific to my panel type. The new meter only works with the panel in the generator mode and the generator is suppling power. I purchased two of the Drok meters and a box to mount them, worked out well I think as can be seen in the picture. This is the meter showing each side of the panel and the draw on each 10 amps and 12 amps (with most everything turned on short of dryer). By installing two meters I can better balance the load. On the panel switching on a120v circuit will affect only one side of the panel, if you have 220v appliances it will affect both. Visibility is excellent and I checked the AMP measurements and found them to be very close to that of my hand held ammeter. Installation: note that this install should only be performed by an electrician or someone very familiar with the main electric panel, the cover on the panel must be removed and it has live voltage. Install was not hard, just careful planning. Install of the amp meters requires the coils to go around the wires coming into the breaker for the generator, this meant removing the wires from the breaker and inserting them though the coil and reconnecting back to breaker. In normal condition those wires are not hot - only hot when generator is on, so no voltage on them to worry about, but to be safe the main breaker can be turned off. I found a good place where the supply wires were in an open area to put a small dip in the wire to hold the coil in place. The volt meter required one connection to the same hot wire and the second wire to the neutral/ground bus. This was the trickier connection, requiring inserting two wires back into the breaker and finding a place on the bus for the other. My only negative comment about the product was the wires that come with the unit were VERY short, you have to extend them. I used light gauge solid core wire (left over from garage door install) as there is very little power on the wires. I soldered each connection and used shrink tube to prevent a short. Install took about 30 mins for the box cutting and 60 mins to wire up to the panel, working cautiously. As a side note I also purchased the Westinghouse WGen9500DF Dual Fuel Portable Generator from Amazon and I'm very happy with it. At 8500 watts on propane it has plenty of power for this 30Amp interlock circuit.

This is a great meter. It is bright, and easy to read. The only con is it only shows amps in one direction. Other DCA meters I have show a + number for charging the connected battery, and a - number for discharge. When connected, this device will show battery discharge accurately, but to get a charge reading you have to swap the sensor wires across the shunt. It is really a great device. I recommend it. It is also a great value for a big super easy to read display. Easily read from across the room, unlike most others.

I built a portable Trailer Tester which I used this voltage/amp display in it. In the picture, the amp display isn't showing any amps because a trailer isn't plugged into the tester. The amp display is wired to the trailer plug grounding wire. I did plug the tester up to a trailer and the amp display was showing an amp draw but I don't know how accurate it is. I will update the review if it stops working. I just installed it so I will see how long it will last. It works great for my application.

Have only had this meter for a couple of days so I’m unable to give a long term review, HOWEVER at present it’s working great. Bright and EASY to read😀

Not accurate 😕 I wired it up to test bench used my portable heater for amperage test, this product said 14 amp my fluke meters both said 12.5 the correct amperage