About REFU – since 1965
From frequency converters to photovoltaics.
REFU has been developing power electronics since 1965. Today we offer inverters, plant control and monitoring for photovoltaics from a single source, based in Pfullingen and as part of the PRETTL Group.
- 1965
- founded
- 425,000
- installations
- 25
- countries
Our history
On the move since 1965
1965
REFU Elektronik is founded
1997
First PV inverter
2004
Becomes part of the PRETTL Group
2009
New product line REFUsol Gen II, 10K–20K
2012
Entry into battery storage systems
2014
Market launch of Power String 40/46K
2023
Storage business spun off to Pramac (100 kW to 4 MW)
2024
New REFUsol product families 20K–360K
2026
Market launch of the REFU 261 and REFU 418 battery storage systems
PRETTL Group
Part of PRETTL
Since 2004, REFU Elektronik has been part of the internationally successful PRETTL Group – a family-run group of companies with more than 70 years of experience and over 10,000 employees at more than 40 locations worldwide.
Integration into the PRETTL structure has not only enabled REFU Elektronik's international growth, but also laid the foundation for continuous technological innovation in photovoltaics and energy management. Combined with the PRETTL Group's innovative strength and commitment to sustainability, REFU is ideally positioned to actively shape the energy transition worldwide.
The REFU promise
You can count on this
Up to 10-year warranty
We stand behind our products for the long term. Details for each device in the datasheet.
Straight to our engineers
Your call goes to our service engineers in Pfullingen, not to a hold queue.
Support and data in Germany
Technical support and data hosting in Germany. Your plant data stays here.
Support throughout your project
From system design to commissioning, we provide technical support to planners and installers.
Frequently asked questions
In brief
When was REFU founded?
REFU was founded in 1965 as a company for controllable frequency converters. REFU has been active in photovoltaics since 1997.
Who owns REFU?
REFU Elektronik has been part of the PRETTL Group, a family-run group of companies, since 2004.
Where is REFU based?
We are based in Pfullingen near Reutlingen, Marktstraße 185, Germany.
Behind the scenes
Get to know us in person
Trade fairs, projects and everyday life at REFU: follow us on LinkedIn and Instagram.
Discuss your project?
We advise you personally, directly with our engineers.
Or directly+49 7121 145 1888info@refu.com
Request a project