RESOL - Elektronische Regelungen GmbH, headquartered in Hattingen, develops, manufactures and markets electronic controllers for heating and energy systems since 1977 and supplies OEMs, wholesalers and system providers in over 70 countries. According to the report, more than 4 million installations worldwide are currently controlled by RESOL products. The product portfolio includes heating controllers, fresh-water controllers, solar and multifunction controllers, solar stations, pool controllers, compact solar stations and accessories such as temperature sensors, valves and solutions for networking, visualization and remote maintenance; the portfolio was extended with controls for heating with PV and heat transfer. RESOL provides full-service development from hardware and software development to housing design, operates in-house R&D labs and modern production lines and is TÜV-certified according to ISO 9001. RESOL-Elektronische Regelungen Gesellschaft mit beschränkter Haftung. is a family business.
Die Entwicklung, Herstellung und der Vertrieb elektronischer Regelgeräte sowie anderer Elektrogeräte und Zubehör, die Verwaltung anderer Unternehmen.
Converted using the official Destatis and Eurostat correspondence tables; ISIC Rev. 4 is the United Nations' international industry classification.
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Source: German Commercial Register (Handelsregister) Essen Local Court, HRB 15674 (as of 26 October 2026)
| Name | Type | City |
|---|---|---|
| Isabel Pfeil | Geschäftsführer(in) | Sprockhövel |
| Marcel Pfeil | Geschäftsführer(in) | Sprockhövel |
| Rudolf Pfeil | Geschäftsführer(in) | Sprockhövel |
Source: German Commercial Register (Handelsregister) Essen Local Court, HRB 15674 (as of 26 October 2026)
| Date | Event Type | Event |
|---|---|---|
| 16.07.2020 | Business Purpose Update | Die Entwicklung, Herstellung und der Vertrieb elektronischer Regelgeräte sowie anderer Elektrogeräte und Zubehör, die Verwaltung anderer Unternehmen. |
| 04.11.2010 | Business Address Registered | Heiskampstr. 10, 45527 Hattingen |
| 23.05.2001 | Company Name Registered | RESOL-Elektronische Regelungen Gesellschaft mit beschränkter Haftung. |
| Date | Type | Change | Total Capital |
|---|---|---|---|
| 22.07.2003 | Capital Decrease | -24.000 € | 26.000 € |
| 23.05.2001 | Share Capital Set | — | 50.000 DM |
Source: German Commercial Register (Handelsregister) Essen Local Court, HRB 15674 (as of 26 October 2026)
| Year | Revenue | Profit | Balance | Employees |
|---|---|---|---|---|
| 2024 | Rohergebnis€5.9M2 | -€1,463,584 | €12,711,459 | — |
| 2023 | Rohergebnis€11M2 | €2,413,065 | €13,558,852 | — |
| 2022 | Rohergebnis€8.6M2 | €1,293,714 | €11,107,804 | — |
| 2021 | Rohergebnis€8.2M2 | €1,119,480 | €8,762,302 | — |
| 2020 | Rohergebnis€6.6M2 | €350,260 | €8,344,005 | — |
| 2019 | Rohergebnis€6.3M2 | €210,523 | €8,530,676 | — |
| 2018 | Rohergebnis€6.3M2 | -€70,631 | €8,737,762 | — |
| 2017 | Rohergebnis€6.2M2 | -€52,611 | €8,763,696 | — |
| 2016 | Rohergebnis€6.7M2 | €352,068 | €8,629,132 | — |
| 2015 | Rohergebnis€5.6M2 | -€1,397,358 | €8,597,062 | — |
1 Small companies are not required to publish a profit-and-loss statement (§ 326 (1) HGB). The figure shown is the statutory ceiling under § 267 HGB where the balance-sheet total makes it binding — a company may exceed at most one of the three size criteria.
2 Rohergebnis nach § 276 HGB: Umsatzerlöse abzüglich Materialaufwand bzw. Herstellungskosten. Kleine und mittelgroße Kapitalgesellschaften dürfen diese Posten zusammenfassen; die Umsatzerlöse selbst sind dann nicht veröffentlicht und liegen über dem Rohergebnis.
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Source: German Commercial Register (Handelsregister) Essen Local Court, HRB 15674 (as of 26 October 2026)
| Cost type | Amount | Share |
|---|---|---|
| Personnel Costs | €5,341,038 | 86.7% |
| Depreciation | €651,148 | 10.6% |
| Interest & Similar | €169,301 | 2.7% |
