Hot water heating and space heating with solar power thought big
AC•THOR 9s

High-power photovoltaic power diverter for commercial applications
AC•THOR 9s is a 0 - 9 kW linearly controlled photovoltaic power diverter for hot water, electric heat sources and space heating in commercial and large residential installations.
Powerful & intelligent: AC•THOR 9s manages up to three electrical heat sources with precise stepless control based on PV energy availability and heating demand. Perfect for commercial buildings, apartment complexes, and large residential properties with substantial heating requirements. The system ensures optimal comfort while maximizing energy efficiency across multiple heating zones.
AC•THOR 9s excels in complex installations requiring high power capacity and sophisticated control. With its robust 9 kW output and advanced control algorithms, it integrates seamlessly with large PV systems, buffer storage tanks, and building management systems. Professional monitoring and precise load management make it ideal for commercial energy optimization.
Advantages of AC•THOR 9s
- High-power 9 kW capacity for commercial and large residential applications
- Stepless linear power control from 0 to 9 kW across three heating circuits
- Professional-grade reliability with maintenance-free operation
- Ideal for apartment buildings, hotels, and commercial facilities
- Advanced integration with building management and energy systems
- Significant energy cost savings in large-scale heating applications
- Optimized for large PV installations with high energy production

Commercial-Grade Energy Management
AC•THOR 9s delivers enterprise-level solar energy management with precise control for large-scale heating applications.
Designed for commercial environments, the system automatically distributes up to 9 kW of power across three independent heating circuits. Advanced load balancing ensures optimal energy utilization while maintaining precise temperature control for multiple zones or applications simultaneously.
- Multi-zone heating control up to 9 kW
- Real-time load distribution across three circuits
- Professional monitoring and analytics
Advanced Control Technology
Sophisticated control algorithms and professional-grade hardware ensure reliable operation in demanding commercial environments.
The built-in control system features advanced algorithms for optimal power distribution, priority management, and system protection. Professional monitoring capabilities provide detailed insights into energy flows, system performance, and operational efficiency for facility managers and energy consultants.
- Professional installation and commissioning
- Advanced diagnostic and monitoring tools
- Integration with building management systems


Maximum Efficiency & ROI
Achieve exceptional energy efficiency and rapid return on investment with AC•THOR 9s in large-scale applications.
The high-power capacity and intelligent control deliver substantial energy cost savings for commercial facilities. By utilizing excess PV energy for heating, buildings can significantly reduce grid electricity consumption while maintaining optimal comfort levels across all zones.
- Up to 40% reduction in heating costs
- Maximized PV self-consumption up to 90%
- Rapid ROI in commercial applications
AC•THOR 9s Versatile Integration Solutions
Discover the multiple operation modes and advanced integration capabilities of AC•THOR 9s

AC•THOR 9s for 3-phase heating elements up to 9 kW
With the same compact size as the standard AC•THOR, the AC•THOR 9s is capable of controlling 3-phase immersion heaters linearly with an output of up to 9,000 watts. This makes it perfect for large commercial water heating applications and high-capacity residential systems.
All connections in this variant are also pluggable, keeping installation effort minimal while delivering maximum power. The my-PV immersion heater 9 kW is the ideal complement for this configuration.
- Linear control from 0-9 kW on 3-phase systems
- Pluggable connections for easy installation
- Compatible with my-PV 9 kW immersion heaters
AC•THOR 9s for three single-phase heating elements
The AC•THOR 9s can heat very large storage tanks using up to three heating elements controlled linearly one after the other. This staged approach provides the advantage of having hot water available very quickly.
When surplus power exceeds 3,000 watts, multiple elements can be controlled simultaneously to maximize self-consumption and significantly reduce heating time. The my-PV immersion heater 3kW is ideal for this configuration.
- Sequential control of up to 3 heating elements
- Combined operation for high surplus energy
- Faster heating and improved hot water availability


AC•THOR 9s for hot water and space heating
Beyond hot water heating, the AC•THOR 9s provides linear power control for electrical space heating in buildings, making it perfectly suitable for comprehensive photovoltaic energy utilization.
In addition to immersion heater control, the system can supply two independent heating circuits, controlling them separately based on individual zone requirements and available solar energy.
- Combined hot water and space heating control
- Two independent heating circuits
- Comprehensive building heating solution
WiFi Meter Integration
AC•THOR 9s in combination with my-PV WiFi Meter
In combination with my-PV WiFi Meter, AC•THOR 9s uses excess energy from your photovoltaic system to supply electrical heat sources with linear power control up to 9 kW.
- Up to 9 kW linear power control
- Real-time energy monitoring
- Optimal energy utilization
Battery Storage
AC•THOR 9s in combination with battery storage
In combination with compatible batteries, AC•THOR 9s performs a hybrid storage function. Building thermal mass can be used as energy storage for large PV systems.
- Hybrid storage function
- Optimal priority regulation
- Maximum PV energy utilization
Smart Home
AC•THOR 9s in combination with Smart Home
Flexible control capabilities enable seamless communication with energy management systems. Comprehensive data visualization in Smart Home Systems while managing up to 9 kW.
- Energy management integration
- Data visualization
- Multi-zone control
Dynamic Tariffs
AC•THOR 9s in combination with dynamic electricity tariffs
On low sunlight days, AC•THOR 9s utilizes cheaper grid electricity for heating supply. The my-PV DTO automatically controls heating based on lowest market prices.
- Automatic price optimization
- Cloud-based control
- Cost-effective heating
AC•THOR & Victron Energy Integration
Professional energy solutions for grid-tied and off-grid applications

Professional Energy Storage System Integration
AC•THOR seamlessly integrates with Victron Energy systems to create a comprehensive Energy Storage System (ESS) that maximizes your renewable energy utilization.
The integration with Victron Energy's advanced monitoring and control systems allows for sophisticated energy management strategies. AC•THOR can be configured to work in harmony with battery storage systems, ensuring optimal energy distribution between battery charging, hot water heating, and grid feed-in based on real-time energy availability and demand patterns.

Off-Grid Energy Independence
AC•THOR enables complete energy independence in remote locations through intelligent integration with Victron Energy's off-grid systems.
In off-grid applications, AC•THOR works as a smart load to optimize battery life and energy efficiency. The system prioritizes essential loads while using excess solar energy for heating, ensuring comfort without compromising critical power needs. Perfect for remote cabins, industrial facilities, and locations without grid access.
Off-Grid Key Features
- Remote location compatibility
- Battery life optimization
- Smart load prioritization
- Weather-adaptive operation