12/24 Volt DC Digital LED Panel Meter with On/Off Switch
12/24 Volt DC Digital LED Panel Meter with On/Off Switch

12/24 Volt DC Digital LED Panel Meter with On/Off Switch

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Your Price: $35.60
Part Number: M12-30
Availability: Out of Stock.

A highly-efficient yet flexible meter which can be used to measure the voltage of 12 or 24 volt battery banks directly.  No separate power supply is needed! Simply hook up the two lead wires directly to your batteries.


  • 8.5V to 30V DC Digital Red LED Panel Meter
  • Large (0.56"/14.2mm) easy-to-read red LED display.
  • Wide application range. Can be used to measure the voltage of various batteries ranging from 8.5-30V DC.
  • Successive approximation-based AD conversion, which is fast and accurate.
  • High-efficient DC-DC converter, with very low temp rise.

Finally an affordable, ready to go volt meter for your alternate energy system.

This meter is also perfect for measuring vehicle, yacht, electric toy, tool or motorcycles having a single or double set of 12V storage batteries.

Advantage over other panel meters by competitors:

  • Compared with LCD panel meters, this LED panel meter has a high contrast, wide viewing angle with very easy to read numbering.
  • Super convenient operation (DOES NOT need an additional power supply.) Hook up the two leads and you are set.
  • Self adapted to ambient brightness, not dazzling in night time as the panel meter will automatically adjust its brightness.
  • On/Off Switch -- This meter uses only 13ma ( .0013 amps) in darkness. If you are like many of us who simply do not like wasted energy, regardless of how small it is, then you will love this meter, as you can simply shut if off when you are not using it.
  • Great looking, black matte solid metal face plate, mounts on a standard dual switch outlet box (included.) This allows you to flush mount it if desired into a standard electrical switch box. 


Analog Input Min. Typ. Max.
Scale Input Range 8.5 - 30 V

Power Supply Requirements

Supply Voltage8.5 12 30 V
Supply Current (@ VCC = 12V )

Full sunlight

- 30 - mA

Total darkness

- 13 - mA
Power consumption ( @ VCC = 12V ) 

Full Sunlight

- 0.36 - W

Total Darkness

- 0.156 - W

Responding Rate:

- 1 - s

Accuracy (@3 minute warm up )

0.01 0.08 0.15 V
Display Type and Size 3 2/3 digit, 0.56 in/14.2 mm high LED
Over-range Indication "1_ _ _"
Operating Temperature -1 - 60 ?
Storage Temperature -40 - 75 ?
Humidity 0 - 85 %RH

No manual is included with this meter, as it is about as simple as it gets.

To use this meter, simply hook up the red lead wire to your positive battery post (or energy source) and the black wire to the negative side. The meter will function great in the range of 8.5v to 30v. If you exceed 30 volts, it will read "1___", voltages lower than 8.5v may be inaccurate.

Flip the switch up to turn the meter on, and down to shut if off. That's about it, super simple, yet super functional!

Tips & Things to Remember in DC Amp Meter Wiring:

  • Use a DC amp meter for amp readings
  • Don't allow incoming power to exceed the rated amperage (or voltage) of your meter - it may break the unit
  • Match the amp rating of the meter to the amp rating of the shunt bar
  • Match the millivolts (mv) of the meter to the millivolt (mv) rating of the shunt bar
  • The two wires between the meter and shunt bar need to be the same length
  • A wind turbine should be connected to a separate meter than the solar panel(s)
  • To test the amps or volts of your wind turbine or solar panel system with a handheld clamp on meter, you must use a DC model

Troubleshooting your DC Meter Issues:

  • If the needle on the meter is a negative reading, switch the sense wires between the meter and shunt bar
  • If the needle on your analog meter is not at zero when there isn't incoming power, you can calibrate it by turning the screw on the front of the meter
  • If your digital handheld DC meter isn't giving you an accurate reading, check the batteries in the unit

About DC Volt Meters:

  • The positive and negative inputs are typically not marked on the DC Volt Meter.  If you connect them to your battery and get a negative reading, simply swap the wires.
  • 12 Volt battery systems should use a 15 Volt meter; 48 Volt systems should use a 70-75 Volt meter.

Wiring Diagrams:

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