DC Energy Meter
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DC energy meters from YADA Electronics — a Guangdong-based manufacturer (Beijing Stock Exchange: 920556) building bidirectional DC metering for EV fast charging, solar PV arrays, battery energy storage and DC microgrids. This category holds 8 DC energy meter models rated to 1000 V DC in Class 0.5 accuracy, with MID-approved and CE/UKCA-certified options.
Why DC Metering Is Not Just An AC Meter With Different Terminals
A DC charging session has no zero crossing to synchronise on, current can reverse within a second when storage is involved, and the shunt or Hall sensor introduces its own drift with temperature. That is why a DC meter is specified by voltage class, bidirectional capability and accuracy class rather than by phase configuration.
| Model | Distinguishing Capability | Typical Installation |
|---|---|---|
| YDM500D | MID approval, 1000 V, two independent RS-485 ports | Dual-gun or multi-gun DC fast charging stations where each outlet is billed separately. |
| DCM3366P-N | RS-485 plus Ethernet, bidirectional | Hybrid DC/AC sites that already have an IP network to the cabinet. |
| DCM3366D-J2-G | 0–1000 V / 100 A, Class 0.5, DIN rail | DC microgrid branches and mid-power charging. |
| DCM3366Q | Bidirectional, tuned for PV strings | Solar arrays where generation and consumption both need accounting. |
| DCM3366D | CE and UKCA certified | EU and UK deployments requiring documented conformity. |
| DJSF3366 | Time-of-use energy registers, Class 0.5 | DC charging piles on tariff-based pricing. |
DC Energy Meter Technical Specifications
| Parameter | Specification |
|---|---|
| Voltage rating | Up to 1000 V DC |
| Current | Up to 100 A on DCM3366D-J2-G; higher via external shunt / Hall sensor |
| Accuracy class | Class 0.5 / Class 1.0 |
| Direction | Bidirectional — separate import and export registers |
| Communication | RS-485 Modbus RTU; Ethernet on DCM3366P-N; dual RS-485 on YDM500D |
| Tariff | Time-of-use registers (DJSF3366) |
| Display | LCD |
| Mounting | 35 mm DIN rail |
| Certification | MID (YDM500D); CE / UKCA (DCM3366D) |
Typical Applications
- DC fast charging stations — per-outlet billing on dual-gun chargers using the YDM500D’s two RS-485 ports.
- Solar PV arrays — string-level generation accounting with the DCM3366Q.
- Battery energy storage (ESS) — bidirectional registers separate charge from discharge, which is the basis of round-trip efficiency reporting.
- DC microgrids — branch metering on 1000 V distribution.
- Telecom and data-centre DC plant — rectifier output monitoring.
How To Select A DC Energy Meter
- Fix the maximum DC bus voltage and confirm it sits inside the 1000 V class with margin.
- Decide whether energy flows both ways. Storage and V2G require bidirectional registers; a one-way PV feed does not.
- Set the accuracy class from the commercial use. Billing normally requires Class 0.5 and, in the EU, MID approval.
- Count the metering points. A dual-gun charger needs two independent streams — either two meters or one YDM500D.
- Choose the transport. RS-485 Modbus for cabinet-local wiring; Ethernet where the site network already reaches the enclosure.
- Confirm the market’s conformity requirement — CE, UKCA or MID — before finalising the model.
Frequently Asked Questions
Which model is MID approved?
The YDM500D carries MID approval and is rated to 1000 V DC at Class 0.5. Where the DC reading is the basis of a billing contract in the EU, MID approval is normally mandatory.
Can one meter handle a dual-gun DC charger?
Yes. The YDM500D provides two-way DC connection and metering with two independent RS-485 interfaces, so each outlet’s data can be uploaded separately.
Do these meters measure charge and discharge separately?
Yes — bidirectional measurement with separate registers is standard across the range, which is what storage round-trip reporting requires.
What if the current exceeds the meter’s direct rating?
Use an external shunt or Hall-effect sensor. YADA’s Hall sensor range covers up to ±2000 A and pairs with these meters.
Related Product Categories
- AC Energy Meters — for the AC side of the same charging or storage installation.
- Hall Effect Current Sensors — external DC current sensing above the meter’s direct rating.
- New Energy Meters — PV inverter and distributed-generation metering.
- Surge Protection Devices — DC-rated SPDs for PV strings and charger cabinets.
- Power Meters — AC-side multifunction measurement.
Request A DC Energy Meter Quote
Send the maximum DC bus voltage, current, whether energy flows in both directions, the number of metering points and the conformity requirement (CE / UKCA / MID). YADA’s engineering team confirms the model.