Electronic systems for renewable energy sources, home automation



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End of rationing system

Dear customers, due to the availability of parts for production, we are stopping the rationing system for all products supplied by us from September 1, 2023. All products are now in sufficient quantities in stock.

Rationing system

Dear customers, due to the high demand, we are introducing a rationing system for our most ordered products from 9 January 2023. For more information about this method of purchase, see here. New registrations are temporarily suspended until January 16, 2023 to allow priority purchase for our long-term business partners.

Design change

Dear customers, due to better availability, from 22/08/2022 we deliver all our controllers in slightly different installation boxes, which are functionally completely identical to the original ones, only they are slightly different in design - they do not have the bottom sharp edge. The size of the controller, i.e. the number of modules and other parameters, does not change. The absence of the bottom sharp edge also objectively facilitates the installation of the controller in the switchboard.

End of cooperation with Russia

Today we ended our cooperation with Russia. No orders from this country are possible and no technical support will be provided. Also, Russian language will be removed from all our future software updates.

Price increase

Dear customers, business partners,
Due to the ever-increasing prices of all input components and energies, we are also forced to increase the prices of our products and accessories that we offer. Price increase 1.2.2022
As part of the adjustment of our price lists, on the other hand, there was a slight reduction in software extensions.
You can find the new prices in our e-shop.
Thank you for your understanding.


This is our experimental power converter that is controllable by an external signal. This converter can adjust the power of the thermal load by changing the amplitude of the alternating supply current without changing the other parameters of the supply current. The frequency and sine wave remain preserved, so it is an AC/AC converter.

Within the WATTrouter ecosystem, one of these inverters can replace one SSR up to 10A.

Parameters and Properties

  • Maximum power consumption of the connected appliance 2kW (9A).
  • Does not change the voltage frequency, it remains 50Hz.
  • Does not change the voltage waveform, it remains sinusoidal.
  • Smoothly changes voltage amplitude in one percent steps.
  • Control using PWM or 0-10V signal.
  • Reacts very quickly to power change requests, response within 10ms.
  • It does not create flicker like any proportional regulation using SSRs and zero-switched triacs.
  • High frequency and radio interference is low enough.
  • Protection against overload and short circuit of the appliance.
  • Protection against load disconnection (e.g. by thermostat).
  • Active temperature-controlled cooling, the fan only switches on when a certain temperature is exceeded.
  • In standby, it disconnects the power part including EMI filters, i.e. reduces idle consumption to a minimum.
  • In the steady state, with active regulation, the current to/from the network is always zero (if the PV inverter output is also sinusoidal).

This inverter, together with our wattrouter, is able to reduce the excess energy to the network to an absolute minimum, typically several tens of Wh per day (if the appliance connected to the inverter is still active and the power plant's output does not exceed its power input). These are usually small, so-called grid-free power plants. Technically, these PV plants can also work with a common unidirectional electricity meter, which counts all energy flows into the network as consumption from the network, and excess energy can be neglected. Therefore, a four-quadrant or two-way electricity meter is not needed at all.

Attention: This is only a technical point of view, the connection of such a PV plant without the consent of the grid operator is usually prohibited!

Launch and Estimated Price

This inverter is not yet mass-produced, we do not plan to launch it on the market earlier than during 2023. A necessary condition for the start of production is also the stabilization of the market for electronic components, which is not in sight at the time of publication of this article (winter 2023).

The estimated price of the converter will be 400 EUR.

Two SINEDRIVERS running at our demo location.