DROK DC Power Monitor, Digital Multimeter DC 6.5-100V 20A Voltage Amperage Power Energy Meter, Volt Amp Tester Gauge LCD Digital Display with Built-in Shunt

Wanted to get a power meter to figure out how much power my tent trailer used on a typical trip. we are taking a 3-week off-grid trip this summer and needed to know if solar can charge the batteries or if we need a generator. Originally was just going to hook up in the circuit temporarily and take some measurements, but once i hooked it up it seems like really valuable info to have all the time. I installed the meter in the cupboard below the galley on my tent trailer and tapped into the wire coming from the batteries back to the inverter. Seems to work great so far, only been installed a few days, but so nice to have accurate information about how much energy my tent trailer uses!

The meter works as advertised and for the price it has excellent value. Note that the current meter is in the negative side between DC IN - and Load -. This is important if you use a switch, like I do, to change the meter's polarity between charging and discharging a battery. The current meter will not run backwards. In other words, the meter will only increase its reading when positive current flows in the direction of DC IN + to Load +. Current will flow in the other direction, but the power and current meters will not read negative values, and the Watt-hour meter will not decrease its reading. To use the meter to monitor power from a solar panel to a battery, I connect the solar panel to the DC IN + and DC IN - terminals, and the battery itself to the Load + and Load - terminals. When discharging the battery into the intended load, I reconnect the meter (using a switch) into its conventional connection topology. Since the current meter is in the negative side, DC IN + and Load + are connected together in the unit. In other words, they are the same node. The unit is made to mount in a square hole in 0.032" thick material. I used a thin bead of Silicone adhesive around the bezel to strengthen this mechanical connection. The operation of the screw terminals can be confusing, and can lead to damage if one is not careful. They come tightened down, so to connect a wire first loosen the terminal by turning the screw counterclockwise several turns, insert the wire in the gap that's just been opened, and then tighten the screw in a clockwise direction. I verified that the terminal block will accept 12 gauge wire.

PROs: Good price. Works great. I love the on/off back-light display. Very accurate numbers (matches very close to my high quality multimeter). I use it on a 12VDC battery/solar powered iPod charger/stereo external speaker amplifier system (camping). The unit itself consumes 0.8mA @12VDC with back-light off and 2.8mA @12VDC with back-light on. I have an external switch so I can monitor solar power in OR load power out. Cons: Only con is that the current unit resolution is too large. The 0-20A minimum current that it reads is 10mA (10,20,30 etc). I would have liked it to have 1mA range, or better yet Selectable: 0-19.999A range with 1mA resolution and a 0-1.9999A range with 0.1mA resolution. (Power and W.Hr to scale by 10 also).

I love how easy and convenient this device is! There is no setup required at all since the shunt is built in, you just plug in the power and run your load through it and it does the rest for you! It is fairly responsive as well, showing any fluctuations in the ratings in real time.There may not be a mounting bracket, but there are two clips on the sides that will hold it in place if you put it through a slot cut to its size, which isn't too hard to do as its just a simple rectangle. The terminals are a bit close to the clips though so depending how you mount the wires, they might make contact with the surface the device is mounted to.

Bon produit, description exact fait le travail