In November 2025, our developers from VONSCH took part in a professional verification at the CEZ laboratory in Hradec Králové, where we successfully obtained a certificate:
“Verification of PPDS Requirements – Annex 4 (2022) – Non-synchronous production modules of category A1 + A2”
This certification confirms that our solutions meet the current technical and legislative requirements for connecting non-synchronous generation modules to the distribution network in the Czech Republic.
What it means in practice
From now on, we can officially and without restrictions connect the UNIRU inverter system, which is part of our network inverters, to the distribution network in the Czech Republic up to a power of 100 kVA (100 kW) according to the latest valid regulations.
Certification applies to products:
- QUATROFREM
- PHOTO CONTROL 3f
- PV COMP
- GSE CONTROL
- GSE COMP
For our partners, designers and end customers, this means a simpler permitting process, certainty of compliance with standards and solutions ready for real operation.
Why this certification is important
In today’s energy and industrial solutions environment, it is no longer enough for technology to “work”. It has to be:
- in accordance with the current requirements of the distribution companies,
- verified by an independent authority,
- ready for long-term operation in a real network.
For us at VONSCH, obtaining the certification is confirmation that developing our own solutions makes sense and that even a smaller, specialized company can keep up with the highest technical standards.
VONSCH: own development, own responsibility
As a second-generation family business, we have long been looking for space where mass solutions are not enough. We develop and manufacture our own products that we can adapt to specific projects and technical conditions.
This certification is also a result of:
- the work of our internal development team,
- emphasis on technical quality,
- and the ability to respond to changing market and legislative requirements.
Where to go next
CEZ certification is another step for us in expanding the scope of our solutions on the Czech market. It is also a signal to our partners that VONSCH products are ready for projects that require reliability, transparency and technical certainty. If you are dealing with the connection of production sources to the network in the Czech Republic or are looking for a tailor-made solution, we would be happy to talk to you about it.
