The Eastron SDM630-Modbus V2 (product code: IC-METER) is a DIN-rail mounted smart energy meter supporting single-phase 2-wire, three-phase 3-wire, and three-phase 4-wire electrical systems. It is the designated companion meter for Iconica grid-tie hybrid inverters, enabling the self-consumption (export limitation) function that controls power generation and battery charging based on live grid import/export readings. Communication uses the RS-485 Modbus RTU protocol — the meter connects to the inverter via the IC-MODBUS RS-485 card (sold separately) which plugs into the inverter's intelligent slot. The SDM630-Modbus V2 measures and displays voltage, current, frequency, power, power factor, THD%, and imported/exported active and reactive energy in kWh and kVArh, with bi-directional metering supporting net-count calculation (Total = Import − Export). The built-in direct-connection current path accepts up to 80A — no external current transformers required — making the installation cost-effective and straightforward.
⚠ Specification Note — Direct Connection Current Rating
The product listing from Photonic Universe describes this meter as a "100A direct connection" unit. However, the official Eastron SDM630-Modbus V2 user manual (V1.6B) states a maximum direct connection of 80A. The 80A figure from the manufacturer's own technical document should be treated as authoritative. Photonic Universe's 100A claim may reflect an earlier variant or a data entry error. Verify with your supplier if your application exceeds 80A.
80A
Direct Connection (no CT)
3-Phase
1P2W / 3P3W / 3P4W
Class 1
IEC 62053-21 Accuracy
2 Pulse
Outputs (1 configurable)
⚠ RS-485 Modbus Card Required for Iconica Integration
This meter alone does not integrate the Iconica inverter's self-consumption function. The IC-MODBUS RS-485 Modbus card must be purchased and installed into the Iconica inverter's intelligent slot to establish the RS-485 link between meter and inverter. Both products are needed to enable self-consumption and battery charging control.
⚡ Qualified Electrician Required — Live Mains Connection
This device connects directly into the mains supply (up to 500V AC phase-to-phase). Installation must be carried out by a qualified electrician in compliance with BS 7671 (18th Edition) and applicable Building Regulations. Load wiring terminal accepts 4–25mm² stranded wire; communication/pulse terminals accept 0.5–1.5mm².
ℹ How Self-Consumption Works with This Meter
The SDM630-Modbus V2 sits at the grid connection point and continuously measures import and export power. The Iconica inverter polls this data over the RS-485 Modbus link and modulates solar output and battery charge/discharge to minimise grid export and maximise self-consumption. Suitable for single-inverter and three-inverter parallel configurations when paired with the IC-MODBUS card (see the IC-MODBUS FAQ for multi-inverter addressing).
No External CTs Required
Direct current measurement up to 80A via built-in current sensing — eliminates the cost and complexity of fitting external current transformers. Load wiring terminals accept conductors from 4mm² to 25mm².
Bi-Directional Metering
Independently accumulates imported and exported active and reactive energy. Net-count total (Import − Export) is also available. Maximum demand current and power are logged and resettable over configurable integration periods of up to 60 minutes.
RS-485 Modbus RTU
Fully configurable from the front panel: address (001–247), baud rate (2.4k–38.4k), parity (even/odd/none), and stop bits (1 or 2). Default settings for Iconica pairing: address 001, 19200 bps, no parity, 1 stop bit. Password-protected setup (default 1000).
Dual Pulse Outputs
Pulse output 1 is fully configurable — assignable to total/import/export kWh or kVArh, with pulse constant from 2.5Wh to 100kWh per pulse and width 60/100/200ms. Pulse output 2 is fixed at 400 imp/kWh for import active energy (S0 compatible). Both can operate simultaneously.
THD% & Demand Monitoring
Measures voltage and current total harmonic distortion (THD%) per phase — useful for diagnosing power quality issues on shared supplies. Maximum power and current demand are logged over configurable intervals (0, 5, 8, 10, 15, 20, 30, 60 minutes).
35mm DIN Rail Mount
Standard DIN rail form factor (72 × 100 × 66mm) fits into any compatible consumer unit or distribution board. Lightweight at 0.32kg. Highly visible LCD with selectable backlight duration (always on, 5, 10, 30, 60, or 120 minutes).
| Eastron SDM630-Modbus V2 — Technical Specification (from Eastron manual V1.6B) |
| Electrical |
| Supported Supply Systems |
1P2W (single phase 2-wire), 3P3W (3-phase 3-wire), 3P4W (3-phase 4-wire) |
| Max Direct Connection Current |
80A (per Eastron manual V1.6B — see note above re: 100A listing discrepancy) |
| Phase-to-Neutral Voltage Range |
100–289V AC (not applicable for 3P3W) |
| Phase-to-Phase Voltage Range |
173–500V AC (3-phase only) |
| Measured Parameters |
| Energy (active) |
Import, Export, Total (net count) — kWh, up to 999,999.99 kWh |
| Energy (reactive) |
Import, Export, Total — kVArh, up to 999,999.99 kVArh |
| Power |
Active (kW), Reactive (kVAr), Apparent (kVA) — 0 to 99,999 |
| Other Parameters |
Voltage, Current, Frequency, Power Factor, THD% (V&I per phase), Max Demand |
| Accuracy |
| Active Energy |
Class 1 (IEC 62053-21) / Class B (EN50470-1/3) |
| Reactive Energy |
Class 2 (IEC 62053-23) |
| Voltage / Current |
±0.5% of range / ±0.5% of nominal |
| Frequency |
±0.2% of mid-frequency |
| Active / Reactive / Apparent Power |
±1% of range maximum |
| Communication & Outputs |
| RS-485 Protocol |
Modbus RTU |
| Baud Rates |
2400, 4800, 9600, 19200, 38400 bps |
| RS-485 Address Range |
001–247 |
| Parity / Stop Bits |
Even / Odd / None; 1 or 2 stop bits |
| Pulse Output 1 |
Configurable — total/import/export kWh or kVArh; 2.5Wh–100kWh/pulse; 60/100/200ms width |
| Pulse Output 2 |
Fixed — 400 imp/kWh import active energy; 100ms width (non-configurable) |
| Physical & Environmental |
| Dimensions (H × W × D) |
72 × 100 × 66 mm |
| Weight |
0.32 kg |
| Mounting |
35mm DIN rail |
| Load Wire Terminal Capacity |
4–25mm² |
| Comms/Pulse Wire Terminal |
0.5–1.5mm² |
| Operating Temperature |
−25°C to +55°C (3K6 class) |
| Storage Temperature |
−40°C to +70°C |
| Relative Humidity |
0–90%, non-condensing |
| Altitude |
Up to 2000m |
| Display |
LCD with configurable backlight (always on / 5 / 10 / 30 / 60 / 120 min) |
| Warm-Up Time |
5 seconds |
| Warranty |
1 year manufacturer warranty |
| Product Code |
IC-METER |
| Manufacturer |
Zhejiang Eastron Electronic Co., Ltd. |
Frequently Asked Questions
Do I need anything else to connect this meter to my Iconica inverter?
Yes — the IC-MODBUS RS-485 Modbus card must be fitted into the Iconica inverter's intelligent slot. The RS-485 cable (pins: A, B, GND) then runs between the meter and the card. The meter and card must be configured with matching Modbus settings: address 001, 19200 bps, no parity, 1 stop bit for single-inverter applications.
Where should I install the meter — at the inverter or at the grid connection point?
The meter must be installed at the grid connection point (typically at the main consumer unit or distribution board, before any load branching), so it measures total household import and export. Installing it downstream will give incorrect readings and prevent the self-consumption algorithm from working properly.
Can I use this meter on a single-phase installation?
Yes. The SDM630-Modbus V2 supports 1P2W (single phase, 2-wire) as well as 3P3W and 3P4W systems. Configure the supply system via the password-protected setup menu. The same meter hardware covers single and three-phase sites, making it a versatile stock item.
What is the difference between the direct connection rating stated on the product listing (100A) vs the Eastron manual (80A)?
The Eastron SDM630-Modbus V2 user manual (V1.6B, 2021) — Eastron's own technical document — states 80A direct connection. The Photonic Universe listing quotes 100A. Until Eastron publishes a revised datasheet confirming 100A, the 80A manual figure is the conservative and authoritative limit. If your application regularly draws above 80A, use an external current transformer version of the SDM630 instead.
Can the meter be used with three Iconica inverters in parallel?
Yes. The SDM630-Modbus V2 supports three-inverter parallel applications when each inverter is fitted with an IC-MODBUS card. Each card must be configured with a unique Modbus ID (IDs 2, 3, and 4 for the three inverter cards) and all cards set to server mode. The energy meter retains address 001. Full wiring and configuration details are in the IC-MODBUS user manual.
