Go solar. Go storage.
Electrifying innovations from Germany to achieve affordable and clean energy.

Setting new standards with sustainable, targeted and modern solutions is the philosophy of the pioneer of frequency converters. In over 55 years of successful development, the company has continuously expanded the field of electronics and has now developed as one of the leading suppliers of power electronics in the solar and storage systems segment:

REFU develops and integrates synergistic components for stationary energy solutions and thus offer a common platform for the ‘energy system revolution’. We bundle our competencies in the areas of high-performance electronics in order to develop economical, efficient and environmentally conscious solutions. The key to our success lies in our ability to combine the expertise in controllable power electronics with customer-specific designs and production. REFU is a part of the multinational, diversified PRETTL Group.


Solar and Storage Power Electronics for Affordable & Clean Energy

Electrifying Innovation

Highest Efficiency Winner 2007-2010 Photon Lab

Top 100 – Top Innovator 2011 – 2013

Red Dot Design Award Winner 2013

Solar+ Power Award Winner 2017

German Tech

Over 350.000 REFU Inverter in the field

REFU produces REFU design inverters for different notable OEMs

Measurable Results

Simple 2-box field installation system

Satisfied customers and partners