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Fox ESS 1ph Energy Meter CHNT DDSU666
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FE-AIO-EM | Single-phase CHNT DDSU666 smart meter with 100A external CT for accurate import/export monitoring in Fox ESS systems over long distances.
Key Features
- Single-phase electronic energy meter (DDSU666) with Modbus RTU communication.
- Includes external 100A CT clamp for non-invasive current measurement.
- High accuracy Class B active energy measurement (±1.0%).
- Essential for export limitation when inverter >30m from consumer unit.
- RS485 interface with 9600 baud rate for Fox ESS inverter integration.
- DIN-rail mounting (35mm) for standard distribution board installation.
- Wide operating temperature range -25°C to +55°C.
Technical Specifications
| Rated Voltage | 220-240 V AC |
| Rated Current | 5(80)A direct / 100A via CT |
| Accuracy Class | Class B (±1.0% active energy) |
| Communication | RS485 Modbus RTU (9600 bps) |
| Display | LCD (voltage, current, power, energy, PF, frequency) |
| Pulse Output | 800 imp/kWh |
| Dimensions | 36 × 89 × 74 mm (meter) |
Installation & Application
- Install meter and CT clamp at incoming mains supply position (consumer unit head).
- RS485 cable from meter to inverter (max recommended 1000m with screening).
- Measures positive/negative active energy, voltage, current, power factor and frequency.
- Required for compliant zero-export installations with Fox hybrid/AC/AIO inverters.
MPN: FE-AIO-EM
Model: CHNT DDSU666 Single-Phase with 100A CT
Replaces CT clamp-only solutions for long cable runs, providing full electrical parameter monitoring and precise export control for Fox ESS energy storage systems.
- Type Solar Metering
- Vendor Fox ESS
- SKU FE-AIO-EM
Please note: Delivery times may vary depending on location, with specific details outlined below.
Standard Delivery
UK Mainland
- Delivery Time: 2–4 working days
- Free Delivery on most orders
- £4.95 for small items
- £69 for Solar Panels, Batteries and other specialized large items delivery
Express Delivery
UK Mainland
- Delivery Time: 1–3 working days
- Free Delivery
- £4.95 delivery for small items
Channel Islands
- Postcodes Covered: GY*, IM*, JE*
- Minimum Order: £50
- Delivery Fee: £70
Northern Ireland, Offshore Territories & Scottish Islands
- Postcodes Covered: BT*, HS*, KW, ZE
- Minimum Order: £50
- Delivery Fee: £35
Same Day Delivery
- Eligible Postcodes:
E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW* - Minimum Order: £50
- Same Day Delivery Fee: £70
- Special Requests or Locations:
For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.
Collections
Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.
Collection address: 284 Water Rd, Unit 9, London, HA0 1HX
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