HC3L + 3F DHW – Smart Water Heating

⚡🔌 HC3L + 3F TUV – Smart Water Heating

HC3L + 3F TUV is a comprehensive system for intelligent management of a photovoltaic power plant with a focus on efficient three-phase water heating up to 6.6 kW .
The assembly combines the power of the Fibaro HC3L control unit and the precise control capabilities of the EX.01 module for smooth harvesting of PV surpluses .
With support for HDO and advanced logic, it ensures maximum energy self-sufficiency and household savings.

💼 Commercial presentation

Ideal solution for consumption optimization in small and medium-sized installations, where maximizing the use of self-generated energy is a priority .
The system can continuously regulate heater output across 0–100 %, precisely mirroring current production and preventing unwanted overflows to the grid .
A unique feature is Battery Maintenance Mode, which automatically cares for the lifespan and performance of your battery storage during winter .
The assembly can also operate in zero-feed mode, which is critical for users who do not yet have a grid connection permit from the distributor.

🧠 Master system and communication

The heart of the entire system is the Fibaro Home Center 3 Lite (HC3L) control unit .
The unit communicates with the inverter primarily via Modbus TCP protocol and is standard connected via Wi-Fi .
Through integration of PV forecast (solar irradiance predictions), the system can intelligently plan water heating and energy management based on expected weather conditions.

🧩 Software suite (Package contents)

The assembly includes complete software equipment (Quick Apps) for immediate operation:

• QA Inverter: Provides comprehensive real-time monitoring of energy flows and serves as a tool for active management of inverter operating modes and battery storage.
• QA EMS: Represents central logic for dynamic energy balance management of the property, which intelligently prioritizes the use of PV surpluses among individual devices to achieve maximum energy self-sufficiency.
• QA Boiler: Provides intelligent management of water heating in tanks using continuous or switched control, effectively combining PV surpluses and time schedules to achieve maximum savings and thermal comfort.
• Solar irradiance forecast: QA PV Forecast (without annual fees) – can be extended with the paid version Solcast (quality and data availability guarantee).
• Optional: Possibility to purchase the TUV Mode application for advanced time scheduling of heating according to family needs.
• Optional: HDO Logic: QA HDO provides intelligent management and visualization of low tariff signals, allowing automatic switching of demanding devices to achieve maximum comfort and savings.

⚙️ Key features

Efficient harvesting and battery management

• Three-phase 6.6 kW heating: Smooth power control of three-phase resistive loads (boiler, accumulation tank).
• Continuous control (0–100 %): EX.01 Module enables fine power dosing without sudden grid shocks.
• Sensor connectivity: Includes 2 temperature sensors for precise tank temperature monitoring.
• Expandability: Ability to connect up to 5 SSR relays and create a more complex harvesting system.
• Battery protection: Special algorithm for winter battery storage maintenance.
• Connectivity: Full integration into the Fibaro/Yubii system.

✨ Typical uses

• PV surplus harvesting: Hot water heating in summer months practically free from own production.
• Hybrid systems: Smart cooperation between inverter, battery and water heating.
• Time scheduling: Possibility to set priorities and time windows for water heating reheat according to family needs.
• Smart Home foundation: Possibility of subsequent expansion with additional energy management or lighting, heating or shading control.

🔌 Function conditions and connectivity

• Inverter with Modbus TCP protocol support.
• Stable Wi-Fi network in range of the control unit.
• Installation of components (SSR, EX-01 module) to the cabinet on DIN rail.

In case your inverter does not support Modbus TCP (has only RS485), it is necessary to purchase the communication kit:

• Modbus RTU LAN kit (Extension) – for cable connection.
• Modbus RTU Wi-Fi kit (Extension) – for wireless connection.

🧰 Assembly contents

• 1x HC3L Control Unit
• 1x EX-01 Control Module
• 3x Semiconductor Relay (SSR)
• 2x Temperature Sensor
• Software license (QA Inverter, QA EMS, QA Boiler, QA PV Forecast)

⚠️ Warning:
This assembly standard includes controller connected via Wi-Fi and inverter with Modbus TCP communication. Also included is solar irradiance forecast (PV forecast).
Other functions and modules can be purchased as extensions – see related products.