Founded in 2010 · Mettmann · NRW

Rethinking energy - from vision to complete solution!

For businesses, investors and your home

Solar systems

Photovoltaics for roofs, open spaces and integrated energy concepts.

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What our customers say

★★★★★
4.8 / 5
160 reviews
Manfred “Feldi” Felder a month ago
★★★★★

Today I'd like to give a preliminary review for electrician Orzeck, who carried out the electrical work for me. Mr. Orzeck arrived punctually at the agreed time. He worked professionally, very efficiently, and cleanly. All my questions were answered, and the work site was left very clean. I immediately felt comfortable with him. If the rest of the work goes just as well, I'll give a full review.

Read this review on Google by Manfred “Feldi” Felder
Uli Marx 3 months ago
★★★★★

We had a PV system installed by ERENE in March 2026. The recommendation came from a neighbor who has had an ERENE system for years and is very satisfied. After obtaining several quotes from different companies and having consultations, ERENE was my first choice for the following reasons: 1: You really get expert advice. My system (PV, storage, wallbox) was planned precisely according to my needs by an electrician. All my questions were answered. 2: Installation: Everything went perfectly, with the usual minor issues that always arise on construction sites. All the work was carried out by very friendly tradespeople. Details regarding the implementation were always available for discussion. 3: Function and reliability: The system runs flawlessly and does exactly what it's supposed to. We've hardly drawn any electricity from the grid since March. I can absolutely recommend ERENE.

Read this review on Google by Uli Marx
Eric ALFRED WEIDNER 4 months ago
★★★★★

Absolutely recommendable – 5 stars from the bottom of our hearts! ErEne Green Technologies GmbH installed a 17.75 kWp photovoltaic system for us, and we are absolutely thrilled. From the initial quote to the actual installation work on-site, right through to invoicing and the subsequent support, everything went perfectly smoothly, professionally, and exceptionally well. Unfortunately, such excellent all-around service is rare these days. Many thanks to the entire team for the fantastic work – we wholeheartedly recommend this company!

Read this review on Google by Eric ALFRED WEIDNER

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Connected energy solution for a home

Your tailored energy solution.

Solar power, storage, charging, heating, climate and energy management: we connect the right systems into one solution for your home, business or investment.

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Everything your energy system needs.

Solar panels on a roof

Solar system

Everything starts with the sun.

Your photovoltaic system is the first step towards a more independent and future-ready energy supply. We plan solar solutions for homes, businesses and investors to suit your space, consumption and goals.

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Battery storage system

Battery storage

Solar power, even after sunset.

A battery stores surplus solar power and makes it available when your system produces less. This increases self-consumption and gives your energy concept more flexibility.

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Electric vehicle charging station

Wallbox

Your energy goes with you.

With the right charging solution, your own solar power can also charge your electric vehicle. We connect Wallbox, building and energy production into one practical system.

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Heat pump system

Heat pump

Solar power becomes comfortable warmth.

A heat pump uses renewable energy efficiently for heating and hot water. Combined with photovoltaics and storage, it becomes part of a reliable and economical overall solution.

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Air conditioning system

Air conditioning

A comfortable climate powered by your own energy.

Modern climate systems provide pleasant temperatures while using energy intelligently. We integrate cooling and heating into your wider energy concept instead of treating them as separate systems.

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Intelligent energy management system

EMS / HEMS

In the end, everything works together.

An intelligent energy management system coordinates solar power, storage, Wallbox, heat pump and climate systems. The result is a solution that reacts to your needs and uses energy where it creates the most value.

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