AiLi ELC27-VACT
AiLi DC Combo Meter User Manual
Model: ELC27-VACT | Brand: AiLi
Introduction
The AiLi DC Combo Meter with Through-hole Current Transformer (Hall sensor) is a self-powered device designed for precise measurement of positive and negative current, as well as voltage. It is ideal for monitoring battery and electrical systems in various applications.
This manual provides detailed instructions for the setup, operation, and maintenance of your AiLi DC Combo Meter. Please read this manual thoroughly before use to ensure proper functionality and safety.
Key Features
- Comes with a Through-hole Current transformer.
- The current transformer can be placed on the Positive or Negative side of power.
- Does not require a shunt.
- Measures Charge and Discharge current (-30A to +30A) simultaneously.
- Features reverse polarity protection.
- Does not require isolated power; self-powered from 5-120V.
- Nondestructive installation, very easy to install.
Package Contents

Image: The image displays all components included in the package: the digital panel meter, the through-hole current transformer, and various connecting cables, including an extension cord for the sensor.
Upon opening the package, verify that all components are present:
- 1x Green LED digital panel meter
- 1x Current transformer with cable
- (Note: An extra 6.5ft extension cord for the sensor may be included as shown in the package contents image.)
Setup and Installation
Follow these steps for proper installation of the AiLi DC Combo Meter:
- Mounting the Meter:
The meter has dimensions of 48mm × 29mm × 23mm. Create a mounting hole of 45.5mm × 25.5mm in your desired panel or enclosure. Insert the meter into the hole until it clicks into place.

Image: This image shows the back of the digital panel meter, revealing the circuit board and the connection terminals for power and the current transformer. This view is helpful for understanding the internal components and wiring.
- Connecting the Current Transformer:
The through-hole current transformer (Hall sensor) is crucial for current measurement. It has an aperture of φ20mm. Pass the wire carrying the current you wish to measure through the center of the current transformer. The current transformer can be placed on either the positive or negative side of the power circuit.

Image: This image displays the digital panel meter connected to its current transformer via a white ribbon cable. The meter's display is off, indicating it is not powered. Red and black wires for power input are also visible.
- Powering the Meter:
Connect the meter's power input wires (typically red for positive, black for negative) to a DC power source within the range of 5-120V. The meter is self-powered and does not require an isolated power supply. It features reverse polarity protection.

Image: The digital panel meter is shown powered on, displaying "19.8" (likely volts or amps). A red wire is threaded through the white circular current transformer, indicating a live measurement setup.
- Nondestructive Installation:
The design allows for nondestructive installation, making it very easy to integrate into existing systems without modifying the main power lines beyond passing them through the current transformer.
Operation
The AiLi DC Combo Meter is designed for straightforward operation, providing real-time voltage and current readings.
- Display: The meter features a 7-segment green LED display. Once powered, it will show the measured voltage and current.
- Measurement Range: It measures DC voltage from 5-120V and current from -30A to +30A. The negative current reading indicates discharge, while positive indicates charge.
- Accuracy: The measurement accuracy is ±1%.
- Sampling Rate: The meter updates readings at a sampling rate of 500 ms.
- Applications: Ideal for use in electric vehicles, e-motorcycles, e-scooters, and for monitoring battery and electrical systems in various equipment and electromechanical devices.
Maintenance
The AiLi DC Combo Meter requires minimal maintenance to ensure long-term performance.
- Cleaning: Use a soft, dry cloth to clean the display and casing. Avoid abrasive cleaners or solvents that could damage the plastic material.
- Environmental Conditions: Ensure the meter is operated within its specified working temperature range (-20°C to 60°C) and protected from excessive moisture or direct sunlight.
- Connection Integrity: Periodically check all connections to ensure they are secure and free from corrosion.
- No User Serviceable Parts: The device contains no user-serviceable parts. Do not attempt to open or repair the meter yourself, as this will void any potential warranty and could lead to damage.
Troubleshooting
If you encounter issues with your AiLi DC Combo Meter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or off. | No power supply, incorrect wiring, or power supply outside 5-120V range. |
|
| Incorrect voltage or current reading. | Current transformer not properly installed, faulty wiring, or measurement range exceeded. |
|
| Display flickering or unstable readings. | Unstable power supply or electromagnetic interference. |
|
If the problem persists after attempting these solutions, please contact customer support.
Specifications
| Parameter | Value |
|---|---|
| Model | ELC27-VACT |
| Power Supply | DC 5-120V |
| Running Current | 7-15mA |
| Measuring Range | DC 5-120V / -30A ~ +30A |
| Display Type | 7 segment Green LED |
| Sampling Rate | 500 ms |
| Accuracy | ± 1% |
| Resolution | 0.1V / 0.1A |
| Dimensions (L×W×H) | 48mm × 29mm × 23mm (1.89 x 0.91 x 1.14 inches) |
| Mounting Hole Size | 45.5mm × 25.5mm |
| Hall Sensor Aperture | φ20mm |
| Material | Plastic |
| Item Weight | 90 Grams (3.17 ounces) |
| Manufacturer | Elite Element |
| UPC | 754610749865 |
Warranty Information
Specific warranty details are not provided in the product description. For information regarding warranty coverage and terms, please refer to the product packaging or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.
Customer Support
For technical assistance, troubleshooting beyond this manual, or inquiries about your AiLi DC Combo Meter, please contact the manufacturer or seller:
- Manufacturer: Elite Element
- Seller: Battery Monitor
- Refer to your purchase documentation for specific contact details or visit the official AiLi website.