Digital DC Voltmeter and Ammeter 0–100V / 0–100A – Complete Monitoring with Included Shunt
Want to know exactly what’s happening in your DC circuit without the guesswork? This digital voltmeter and ammeter provides simultaneous, real-time monitoring of both voltage and current up to 100V and 100A. The shunt is included in the box, along with the necessary wiring, so you can get up and running immediately.
Note: The 100A shunt is required for currents exceeding 10A and is included in the package. The module requires a separate power supply of 4.5–30V DC, which is independent of the circuit being measured.
Why choose this model? (Key Advantages):
- Dual-colour LED display — Red digits for voltage and blue digits for current; highly legible even in direct light.
- 100A shunt included — No need to source a compatible shunt separately; everything you need is in the box.
- 0.01V / 0.01A resolution — Get precise readings (e.g., 14.73V and 8.42A) rather than rounded figures that hide critical fluctuations.
- 500ms refresh rate — Values update twice per second, providing responsive monitoring for both stable and dynamic DC applications.
- Low power consumption (<20mA) — Minimal impact on your circuit, making it ideal for small battery systems.
- Compact 48×29×21mm design — Fits easily into control panels, distribution boxes, or DIY enclosures without major modifications.
- Wide operating temperature (-10°C to +65°C) — Reliable performance in automotive installations, workshops, or protected outdoor solar setups.
Performance and Precision
At the heart of this module is a precision microcontroller that processes and displays data every 500ms for a smooth, consistent reading. The voltage resolution adjusts automatically: 0.01V for readings below 10V and 0.1V for higher values, ensuring accuracy exactly where you need it. The independent power supply (4.5–30V DC) allows you to monitor a 72V circuit using a standard 12V auxiliary source, offering maximum flexibility for your projects.
| Parameter | Specification |
|---|---|
| Module supply voltage | DC 4.5 – 30V |
| Measured voltage | DC 0 – 100V |
| Voltage resolution | 0.1V (>10V) / 0.01V (<10V) |
| Measured current | 0 – 100A (shunt included) |
| Current resolution | 0.01A minimum |
| Self-consumption | < 20mA |
| Refresh rate | 500ms |
| Operating temperature | –10°C ~ +65°C |
| Module dimensions | 48 × 29 × 21mm |
| Voltage display colour | Red |
| Current display colour | Blue |
| Measured current type | DC (Direct Current) |
Package Contents
- 1 × Digital LED voltmeter-ammeter module (dual red/blue display)
- 1 × 100A current shunt (with connection leads)
- 1 × Set of connection cables
Frequently Asked Questions
Can this be used for solar photovoltaic or off-grid systems?
Yes. It is compatible with any DC system between 0–100V and 0–100A, including off-grid solar, battery banks, and charge controllers. Just ensure the module is powered separately via a 4.5–30V DC source.
Is the shunt included or sold separately?
The 100A shunt is included in the package, along with the necessary connection cables. No additional purchases are required to measure currents up to 100A.
How do I power the module if my circuit voltage exceeds 30V?
You can use an auxiliary power source or a DC-DC step-down converter to provide the required 4.5V to 30V. The voltage measurement function remains active up to 100V regardless of how the module is powered.
What are the required dimensions for panel mounting?
The module housing is 48 × 29 × 21mm. We recommend a panel cutout of approximately 45 × 26mm for a flush fit. Please verify your measurements before cutting.
Does this work with alternating current (AC)?
No. This module is designed exclusively for direct current (DC). Do not connect it to AC circuits.
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