Huawei Energy Management Assistance | EMMA-A02

Description

The Huawei Energy Management Assistant EMMA-A02 is an intelligent device designed to optimize energy planning, management, and distribution within residential and commercial photovoltaic (PV) systems. By integrating metering, communication, and management functions, EMMA-A02 enables real-time monitoring of energy production and consumption, facilitating seamless communication between your appliances and the smart PV system.

Specifications:

Model: EMMA-A02

Dimensions (W × H × D): 108 mm × 100 mm × 65 mm

Weight: 0.5 kg

Mounting Type: DIN35 Rail

Degree of Protection: IP2X

Operating Temperature Range: –25°C to +60°C

Storage Temperature Range: –40°C to +85°C

Relative Humidity Range: 5% – 95% RH (non-condensing)

Maximum Operating Altitude: 4000 m (derating over 2000 m)

Voltage Measurement Range:

Single-phase (L-N): 85 – 299 V AC

Three-phase (L-L): 148 – 520 V AC

Current Measurement Range:

Direct connection: ≤ 63 A

External CT: > 63 A (secondary current: 50 mA, cable length ≤ 30 m)

Energy Measurement Accuracy: Class 1 (±1%)

Communication Interfaces:

RS485 (2 ports, baud rates: 9600 / 19200 / 115200 bps, length ≤ 50 m)

LAN/WAN: 10/100 Mbps, length ≤ 100 m

WLAN: 802.11b/g/n (2.412 GHz – 2.484 GHz)

Digital Inputs/Outputs: 2 digital inputs and 2 digital outputs (length ≤ 20 m)

LED Indicators: RUN (operation), ALM (alarm), COM (communication)

Reset Button: Supports Wi-Fi wake-up, password reset, and factory settings restoration

Device Management Capacity:

Smart Energy Controllers: up to 3

Smart Chargers: up to 2

Heat Pumps: up to 1 (direct connection), more via Shelly devices

Shelly Devices: up to 20