SMARTFOXBooster 3K
The universal power controller for any heating element – single-phase up to 3 kW / 16 A, three-phase up to 9 kW with Booster Extension.
Universal Power Controller –
For Any Heating Element
The SMARTFOX Booster works with any single-phase heating element up to 3 kW / 16 A. With the Booster Extension, the system becomes three-phase and reaches up to 9 kW total power – including extra relay for pumps or a 2nd heating element.
3 kW / 16 A
Single-Phase
9 kW
With Extension
2×
PT1000 Inputs
1×
Relay Output
Booster (Phase 1)
Base Device
- Single-phase up to 3 kW / 16 A
- Complete Control & Communication
- Standalone or with Inverter
- Extra Relay for Pump / 2nd Heating Element
Booster Extension
Phase 2 & 3
- Expansion for Phase 2 & 3
- Up to 9 kW Total Power
- Connection to Booster via RS485
- Compact DIN Rail Mounting
Booster 3K & Extension
Base module and extension – compact DIN rail mounting for any distribution board.
SMARTFOX Booster 3K
Base Module · 1-phase · 3 kW / 16 A
Booster Extension
Extension Module · +2 Phases · up to 9 kW
Booster 3K + Extension
Fully three-phase – up to 9 kW heating power from one distribution board
649,- €
netto, exkl. MwSt.
What Makes the Booster Special
All smart features of the PRO Heater + – plus power controller technology for universal use with any single-phase heating element.
Hardware
3 kW / 16 A Power Controller
Single-phase power controller for heating elements up to 3 kW / 16 A – works with any commercially available single-phase heating element.
Booster Extension
Retrofit Phase 2 and Phase 3 – together up to 9 kW three-phase control power for larger systems.
Relay Output
Extra relay for circulation pump control or switching to a 2nd heating element – directly integrated, no external module needed.
2× PT1000 Inputs
Both inputs for external temperature sensors (storage stratification, outside, room, buffer) – both alternatively as digital input: HP emergency heating activation or §14a EnWG shutdown when signal active.
LAN & WLAN ab Werk
Same communication module as PRO Heater + – double connectivity for maximum flexibility.
RS485 / Modbus
Connect Booster Extension as slave or integrate into existing building automation (KNX, Loxone).
Software & Control
Direct-Link Technology
Read inverter data directly via TCP/Modbus – completely without SMARTFOX Manager or Smart Meter.
Dynamic Electricity Rates
EPEX Spot connection: All dynamic rates supported (aWATTar, Tibber and more).
Weather-Based Optimization
Coming SoonPredictive heating based on weather forecasts – optimize PV excess utilization.
Integrated Web Server
Modern configuration interface directly on the device – no cloud lock-in, no mandatory app.
Legionella Protection
Configurable disinfection by weekday and time – integrated directly in the device.
Timer (Multi-Stage)
Individual heating plans for each weekday with different temperature levels.
System Integration
Smart Home Integration
Deep integration with Loxone, KNX and other smart home systems via Modbus TCP.
2× Digital Input Function
Both PT1000 inputs can be used as digital inputs – e.g. heat pump emergency activation or §14a EnWG shutdown.
Smart-Grid Ready (§14a EnWG)
Shutdown via PT1000 input as digital input – compliant for controllable consumption devices per §14a EnWG.
Standalone Operation
Fully autonomous operation without upstream energy management system.
Cloud Connection
Complete remote monitoring & control via SMARTFOX app and web portal.
SMARTFOX Energy Manager
Control up to 3 Booster sets in coordination – centralized control of multiple heating circuits
Standalone or as a Team –
Always Smart
Same intelligence as the PRO Heater + – the Booster reads PV data directly from the inverter and efficiently uses excess energy, even without SMARTFOX Manager.
Excess Heat Utilization
Seamless modulation – single-phase up to 3 kW / 16 A, three-phase up to 9 kW (with Extension)
Dynamic Electricity Rates
EPEX Spot connection – all dynamic rates (aWATTar, Tibber and more)
Weather-Based Optimization
Coming SoonPredictive heating based on weather forecasts – optimize PV excess utilization
Timer
Individual heating plans for each weekday
Legionella & Frost Protection
Thermal disinfection & integrated frost protection
Three Use Cases –
One Device
From simple standalone operation with timer to a fully integrated system with SMARTFOX Energy Manager – the Booster grows with your requirements.
Stand-Alone (Grid + Heating Element)
The Booster controls the heating element directly from the grid – by timer, dynamic electricity rates (aWATTar, Tibber) or temperature setpoint. Includes frost protection, legionella protection, and cloud connection.
With PV Inverter (Direct-Link)
Via Direct-Link, the Booster reads PV surplus directly from the inverter via Modbus TCP – no smart meter, no manager required. Additional surplus control for maximum self-consumption.
With SMARTFOX Energy Manager
In the fully integrated system, the SMARTFOX Manager coordinates inverters, smart meters, and multiple Booster devices (Master/Slave via RS485) – up to 9 kW total power with cloud connection.
Same Platform –
Proven Interfaces
The identical communication module as the PRO Heater + – all interfaces, all smart features, plus extra relay output for pump or 2nd heating element.
Integrated Web Server
Direct access – no cloud required
WLAN & LAN from Factory
Same communication module as PRO Heater +
RS485 / Modbus
Only in combination with SMARTFOX Energy Manager, otherwise only one usable
2× PT1000 / Digital Input
Both inputs: temperature sensor or digital input – HP emergency heating, §14a shutdown, or external sensor
Cloud-Link
App & web portal – anytime & anywhere
Relay Output
Extra relay for circulation pump control or switching to 2nd heating element
Standalone – Without Energy Manager
Read inverter data directly via TCP/Modbus – completely without SMARTFOX Manager or Smart Meter.
* More manufacturers coming soon
* Please clarify exact inverter SW versions and compatible HW versions with us.
RRP Net Prices
SMARTFOX Booster 3K
580,- €
net, excl. VAT
Booster Extension
69,- €
net, excl. VAT
Booster 3K + Extension (Set)
649,- €
net, excl. VAT
* Prices are non-binding recommended retail prices (RRP) net excl. VAT. End-customer prices may vary.
All Features in Detail
Frequently Asked Questions – Booster 3K
What is the SMARTFOX Booster 3K?
What is the difference between the Booster and PRO Heater?
What is the Booster Extension?
Does the Booster work without the SMARTFOX Energy Manager?
Which heating elements are compatible with the Booster?
How much does the SMARTFOX Booster 3K cost?