Divert surplus solar PV for water and room heating prior to grid export or when batteries are full to optimise PV self-consumption.

Water heating and space heating with solar power

ACTHOR 9s (0 - 9 kW) and ACTHOR i (0-6kW) are linearly controlled photovoltaic power managers for water heating and room heating.

Simple & efficient: ACTHOR 9s controls up to 3 electrical heat sources and provides comfort - depending on the availability of PV energy and heat demand. And that for both hot water, as well as for space heating. In a residential building that is built or renovated according to current energy standards, AC•THOR 9s replaces conventional, water-based building installations. Missing residual energy can be obtained from the public grid.

ACTHOR can also be integrated into conventional, water-based systems such as buffer storages. Its flexibility leaves nothing to be desired. Thanks to the built-in touch display, it can be operated without any additional devices at any time and it is easy to install.


ACTHOR 9s for 3-phase heating elements up to 9 kW

With the same size as the AC•THOR, the AC•THOR 9s is also capable to control 3-phase immersion heaters linearly with an output of up to 9,000 watts.


ACTHOR 9s also for three single-phase heating elements

The ACTHOR 9s can also be used to heat up very large storage tanks. Up to three heating elements can be controlled linearly one after the other. The advantage: Hot water is available very quickly.

If there is a surplus of more than 3,000 watts available, the elements are also controlled in combination to maximise self-consumption and shorten the heating time.

Immersion heaters can also be located in different tanks. For example, one in the hot water boiler and one or two more in the buffer tank!


ACTHOR 9s for hot water and space heating

In addition to hot water heating, the ACTHOR  9s can also provide linear power control for electrical space heating in buildings.

In addition to the control of the immersion heater, it is possible to supply two heating circuits and control them independently of each other.

Optionally, a heat-pump can be switched via an integrated relay.

ACTHOR in combination with my-PV Power Meter

In combination with my-PV Power Meter, ACTHOR uses excess energy from your photovoltaic system to supply electrical heat sources such as immersion heaters, electric heating mats or infrared panels linearly with power. This ensures that self-consumption is optimised.

ACTHOR in combination with battery storage

In combination with compatible batteries, ACTHOR performs as a hybrid storage function. Not only the hot water, but also the building mass can be used as storage.

Thus, even with larger PV systems, excess PV energy is optimally used. Optimal priority regulation between battery and heat storage is guaranteed.

Click here for the compatible manufacturers.

ACTHOR in combination with Smart Home

Thanks to its flexible control, the ACTHOR also communicates with energy management systems. As an alternative to my-PV Power Meter, the excess information can also be received from these sources. Thus there are no limits for the integration into individual home controls. Data can be visualized in the Smart Home System.

Click here for the compatible manufacturers.


  • Linear power control 0-9 kW
  • 3 controllable outputs
  • For 3-phase immersion heaters with common neutral conductor
  • Easiest heat production in three zones 3 x 3 kW
  • Two-zone space heating possible
  • Also combinable with heat pumps
  • Minimum spatial requirements
  • A system compatible with various inverter manufacturers, battery systems and smart homes
  • Up to 85 % PV self-consumption without battery

Plug & Play - All connections pluggable!

  • No time-consuming wiring
  • No clamping points, no PG cable glands
  • No cumbersome opening of housing




MY-PV Power Meter


For single phase applications

0-3 kW linear power output + 16A relay. Includes ACTHORi, stylus, wall bracket and fixings, output plug for European socket, 1 x digital temperature sensor (cable length 5m)

For single, two or three phase applications.

3 x 3000W linear power output + 16A relay. Includes ACTHOR 9s, cable connectors and 1 x digital temperature sensor (cable length 5m).

Power Meter (3-phase).

Includes 3 x clamp-on current transducers (60A, 10mm2 ). Optional current transducer

Contact our technical team on 1800 433 254 or +61 3 9939 6722 or email [email protected] for assistance.

Webinar 01.10.20

Hot water and space heating from photovoltaics. Energy Smart Water and myPV share new ways to store surplus energy to maximise PV self-consumption. 

Pdf version

ToolBox TechTalk - Smart Energy Lab

Host, Glen Morris of the Smart Energy Lab discusses the topic of "heating water with solar power" with Gerhard Rimpler of MyPV and Norm Anderson of Energy Smart Water.

Case Study: Microgrid with hybrid storage

Glen Morris of the Smart Energy Lab explains how the AC.THOR has been integrated into the Moora Moora microgrid to soak up excess solar for water heating.

Case Study: Avocado Farm (off-grid)

An avocado farm in Western Australia produces 90 tons of avocados annually. The energy concept for irrigation and water heating includes a 53 kW photovoltaic system that simultaneously feeds a 160 kWh saltwater battery as well as a 48 kWh lithium energy storage. The farm is completely off-grid, operating on 100% renewable energy.

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