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RESOL – Your partner in control technology

Since 1977, RESOL has established itself as a leading manufacturer of control technology for solar, heating and energy systems. With high-quality products and custom-made solutions, RESOL has become a reliable partner for OEM manufacturers, specialist firms and wholesalers in the industry. Over the years, the family-run company has expanded its product portfolio and ventured into new, innovative fields such as power-to-heat, DHW exchange and heat transfer.

What makes us who we are

Reliability

  • More than 45 years of experience
  • More than 100 employees
  • More than 20 distributors and subsidiaries worldwide
  • Our products control more than 4 million systems in over 70 countries

Quality

  • All products are tested in our in-house EMC and hydraulics laboratory
  • Controls after each individual manufacturing step warrant a 100% quality assurance
  • ISO:9001 certification
  • All processes under one roof – products 100% Made in Germany

Flexibility

  • Adaptation to your Corporate Design and target markets, even for the smallest batches
  • Individual customisation of all our soft- and hardware is possible
  • Pre-connected cables and sensors to suit your requirements
  • Our product managers will support you in any question that may arise

Your product – developed with us!

Contact us, we will be glad to be there for you!

Company history

Foundation as a solar thermal pioneer company by Rudolf Pfeil

1977

First trade fair appearance at the „Solartechnik“ in Hamburg

1978

Relocation to Hattingen and inauguration of factory I

1997

First workshops for synchronous manufacturing and gradual transition of the production

2005

New building factory II

2006

Extension of factory I and enhancement of the production with state-of-the-art facilities

2009

Foundation of the subsidiary RESOL France

2009

Foundation of the subsidiary RESOL España

2012

Expansion of the general management to include Isabel Pfeil and Marcel Pfeil

2019

Product history

First solar controller B1

1977

Development of the first heating controller

1984

First pump station with integrated solar controller

1998

Datalogger and first visualisation software

2001/2002

Development of the first DHW exchange controller

2005

Birth of the VBus.net visualisation portal

2011

First controller of the new Power-to-Heat product group

2017

New DHW exchange controller with self-learning neural networks

2018

First controller for heat interface units

2024