Review on 🔋 DROK Voltage Amp Meter DC: Monitor Solar System Power with 0-300V 200A Capacity - Hall Sensor Voltmeter Ammeter Current Detector Panel by Christopher Tillman

I use it for automotive applications. Here's what I observed when testing the unit in a lab prior to installation - indoors at room temperature: Current draw, backlight off: 6.1mA @ 14.0V Current draw, backlight on: 17.9mA @ 14.0V Meter accuracy, voltage: +/- 0.1V , 0-15V Meter Accuracy Current: Cannot be reset, meter always shows -0.1A. Meter shows up to 10% lower for positive (discharge) current, 10% higher for negative (charging) current in the range of +/- 5A - the limit of my desktop power supply. The attached graphic shows the current accuracy in this area. I hope it works well in the car. The limited accuracy and accuracy of this gauge, even in a lab environment with relatively low noise levels, means it's not useful for tracking parasitic discharges or continuously charging a parked car battery. For example. In fact, I would consider the power consumption too high for a constant power car accessory. But it should still provide interesting and useful information about the voltage and charge/discharge rate while the car is driving. I have successfully swapped the LEDs in mine to match the rest of the gauges on my dash (2 x 0603) and hooked them up to my car dash lighting circuit. It needs to be disassembled and reworked. There is some sort of communications port on the PCB (unassigned), but I haven't found any explicit access to the "low voltage alarm" signal. So the alarm just flashes on the display, which is pretty much useless. I want them to give us access to an alarm or other I/O options. No comments on in-car performance or reliability yet.