Innovation and leading-edge product development have always been a hallmark of ZETTLER Group’s engineering competence.

During recent years, this has been particularly evident by our leadership role in providing application solutions in the field of Alternative and Renewable Energy and by developing electromechanical components for these specific types of applications.

As the deployment of solar and other alternative energy technologies continues to grow globally, ZETTLER’s NEW ENERGY SOLUTIONS division is committed to supporting customers in renewable energy industries around the world, with first-class engineering and by leveraging ZETTLER Group’s worldwide production and distribution resources.

We continue to be actively engaged in developing next-generation components for future PV/Solar, e-mobility and other alternative energy applications to solidify and expand our market leadership in these important high-growth product segments.

ZETTLER Solar Relays

Solar Inverters convert DC power output coming from photovoltaic (PV) panels into AC current that can be fed into a commercial electrical grid. In the interface to the power grid, electromechanical AC relays play a critical role as switching devices and to provide necessary safety “circuit-break” functions.

As PV power applications proliferate from micro-inverters, to string inverters, to commercial and utility-scale PV systems, we have continuously expanded our line of solar relays.

ZETTLER AC side Solar Relays are suitable for a range of PV inverter applications from under 20kVA to over 200kVA, and can handle max. switching currents from 12 A to 200 A, featuring contact gaps from 1.5 mm to 3.6 mm. They are fully compliant with all pertinent safety standards such as IEC 62109 and carry the required UL/CUR/VDE/TUV approvals (see Solar Relay Product PDF).

These state-of-the-art ZETTLER components have been successfully integrated into many solar inverter applications, and have been used by market-leading producers of PV systems since many years.

On the DC side of PV applications, ZETTLER’s AZSR1100 (60VDC, 100A) relay is suitable to be integrated into PV systems to switch the DC voltage and current from a battery back-up system.

The newly developed AZDC6 is a 600VDC miniature relay for RSS (Rapid Shutting Down System) for Solar installations. The compact size allows for a thinner design of certain RSS boxes, that are deployed as part of compliance with 2017 NEC 690.12.

ZETTLER Electric Vehicle Charging Relays

ZETTLER’s innovative technology and design approach in developing solar relays have also proven to be particularly applicable to switching and safety solutions for Electric Vehicle (EV) Charging Devices. (see e-mobility product PDF)

Joint European and China designed and developed ZETTLER EV Relays are integral parts of In-Cable Control and Protection Devices (IC-CPDs) and other EV charging infrastructure devices for electric vehicles developed and built by leading global car manufacturers and other EV solution suppliers.

The new AZEV116 and AZEV132 series are next-generation IEC mode 2 Electric Vehicle (EV) charging relays that are compliant with the stringent IEC62752 short-circuit withstand-current requirements. These relays are designed to survive high momentary currents that may occur on short circuits, thus ensuring outstanding reliability without contact welding. The AZEV116/132 series will also feature a monitoring contact, making these types of relays ideally suited for EV and other applications demanding high security and safety demands.

ZETTLER’s AZSR131, AZSR143, AZSR165 and AZSR190 relays, initially developed for solar applications, are also being deployed in a variety of “wall box” applications for EV charging with AC voltage according to charging mode 3 (IEC 61851-1).

Additional new EV relay series are under continuous development as the EV charging industry emerges rapidly.