DROK LCD Digital Multimeter Charge-Discharge Battery Coulometer Tester Voltage Current Power Watt Hour Time Capacity Meter Gauge DC 8-80V 75A Battery Status Indicator Monitor Voltmeter Ammeter

Board worked as expected. Easy to install, accurate readings. Good product, great price.

It came in a box with only the shunt and meter and no cable to go between like it shows in the picture

I recommend adding a switch to the circuit to turn the meter on and off. Although it doesnt draw much power at all, it does not turn completely off. This unit saves settings when unplugged or discinnected.

The voltage and current monitoring work well.However, it doesn't show the charge remaining correctly. I've tried setting the battery capacity using both methods and the display does correctly show the battery capacity, but it barely goes down.I suspect mine has a bad clock.

The product came in a box without instructions or manual included. It's not posted on their site either. I had to search for it and the link was posted in one of the comments on Amazon of all the places. You have to know what you're doing because even the instructions are bad and vague. The most frustrating part is the B+ terminal. It is TINY and doesn't hold the wire securely. The wire will fall off if you tug it even a bit. For the price, I was expect it to be a bit more user friendly and sturdy.

This is a great tool at a great price. The provided instructions are decent, the drawing of the required wiring diagram is the most valuable part of the instructions. The text is written in such broken and poor English that they are difficult to understand. Clearly translated from a foreign language by a computer or non-speaker, but after a few readings the important information can be ascertained from them. Setting up the unit initally with the battery voltages and capacity was straight forward, with the only difficulty being pressing 2 buttons at the same time to exit the 'engineering' setting screen. They buttons are so close together, and give very little when pressed so it was difficult to actually press them at the same time with my American sized fingers, 2 pen caps provided the precision needed to accomplish this. All in, for the price its a solid buy if you are willing to interpret the instructions for yourself.

Extremely accurate display of power consumption and battery power.Instant display of the time available to you according to the current load conditions.Exact display of the nominal current, which helps you to choose the optimal moment according to cadence and the input of personal capacity.Great device for this money.I recommend to everyone who drives e-bike over long distances.And something else.Battery status indicators in% and Ah are stored in memory and are no longer changed when the drive stops. Subtraction of capacity continues from this point forward. So when you continue driving.The picture shows the current results of an experimental drive.Battery status: 72% 9.97 Ah - from 13.80AhVoltage: 48.50VCurrent consumption: 8,937Acurrent engine power: 433WThe rest of the time with such conditions: 1h: 22min ...

I put this in a solar battery box. With the limited space I had it fit well. Make sure you understand that the neg battery lead goes to the B- and that the P- goes to the common returns i.e. the current loop created when all your devices are powered up and the return is common to all the devices at a single point. That part took awhile to connect otherwise it functioned but not reading current draw on the loads until connected correctly. I will purchase this again for my next larger solar generator box.