WATTMATE

Every surplus watt, converted.

Continuous PWM regulation from 300 W to 9 kW. Four deployment architectures. One device.

3.6 kW Single Phase 9.0 kW Three Phase

Solar Thermal Diversion

Surplus becomes reserve.

Variable PV output meets continuous power regulation. WattMate converts excess generation into stored thermal energy — automatically, silently, with sub-3% harmonic distortion.

0% solar self-consumption Zero export loss
0 kW stepless output PWM-regulated
0 architectures One device, any topology

Industrial Design

Engineered for discretion.

258 × 338 × 90 mm. Wall-mounted. Three status LEDs convey system state at a glance. Nothing extraneous.

90 mm depth.

Flush-mount profile for installation alongside distribution boards or cylinders. 3.0 kg installed weight.

Single-plane termination.

AC, LAN, PT1000, RS485 Modbus, PE — all connections accessible from below for clean cable routing.

WattMate front view
WattMate side profile
WattMate bottom ports

System Topology

Four architectures. One device.

Select the topology that matches your existing installation.

PV Panels Inverter Smart Meter WattMate Hot Water Grid
PV Panels Inverter WattMate Hot Water MODBUS
EMS Controller WattMate Hot Water Battery PV
PV Panels (DC) WattMate Hot Water 120–300V DC NO GRID REQUIRED

Smart Meter Mode

Inverter-agnostic surplus tracking

Reads real-time export at the grid connection point and continuously modulates heating output. Compatible with any inverter brand or generation topology.

  • Brand-agnostic deployment
  • Real-time surplus metering
  • Zero-export optimization

Inverter Mode

Direct Modbus RTU interface

Communicates with the inverter via RS485 for real-time PV generation data. Eliminates the need for a separate metering device.

  • Native inverter protocol
  • Meterless deployment
  • Feed-in compliance

EMS Mode

Dispatch-controlled operation

Accepts power setpoints from an Energy Management System. Coordinates with batteries, EV chargers, and other controllable loads in the energy hierarchy.

  • Priority-based dispatch
  • Battery-coordinated
  • Whole-system optimization

Solar DC Mode

Grid-independent DC input

Accepts 120–300V DC directly from PV strings. No inverter, no grid connection required. Unique to WattMate.

  • Direct DC conversion
  • 120–300V, 14.5A max
  • Off-grid thermal generation

Power Regulation

Pulse width modulation.
Watt-level precision.

Unlike relay-based diverters, WattMate employs continuous PWM across up to three phases. Stepless 0–9 kW output, sub-3% THDi, inaudible operation.

<3% THDi
300W Cut-in
0–100% Range
4.5 kW
L1
L2
L3

Five load types. Three outputs.

Hot Water
Radiator
Underfloor
Towel Dryer
Infrared

Supports up to three resistive heating elements simultaneously.

Technical Data

Two models. Full coverage.

0%
Drag to rotate
Max. Power
3.6 kW
Voltage
AC 230V
DC Input
120–300V
Protection
IP54
Weight
3.0 kg

AC Input

Voltage
1P AC 230V
3P AC 3 × 230V / 400V
Frequency
50 Hz
Max. Current
1P 16A
3P 3 × 14A

AC Output

Voltage
1P 230V
3P 3 × 230V
Frequency
50 Hz
Max. Heating Power
1P 3.6 kW
3P 9 kW
THDi
<3%

DC Input (Solar Mode)

Voltage Range
120–300V
Max. Current
14.5A
Max. Power
3.6 kW

General

Power Regulation
PWM
Communication
WiFi, LAN, RS485
Temp. Sensor
PT1000
Dimensions
350 × 280 × 110 mm
Weight
3.0 kg
Protection
IP54
Operating Temp.
0 ~ +40 ℃
Certifications
CE, DEKRA, IEC

Field Deployment

Proven in the field.

Residential PV surplus capture

Specification Support

Specify WattMate with clarity.

For the right architecture, model, and deployment path.

Consult Our Team Download Datasheet
CE DEKRA IEC EN 61000