Who we are:
CUBE CONCEPTS

CUBE CONCEPTS GmbH plans and builds rooftop photovoltaic systems from 500 kWp and battery storage systems from 750 kW for industry and commerce, as a purchase or through Contracting. The company was founded in April 2020 as Eigenstrom Direkt GmbH, is headquartered in Kaarst near Düsseldorf and has further locations in Prague and Palma de Mallorca. With more than 45 employees, CUBE CONCEPTS has completed more than 150 energy projects across Europe.

Group photo of the CUBE CONCEPTS team at the 2026 kick-off

Facts

CUBE CONCEPTS at a glance

The companyCube Concepts GmbH - Innovative energy solutions
Commercial registerAmtsgericht Neuss, HRB 21242
Founding28 April 2020 as Eigenstrom Direkt GmbH, since 2021 CUBE CONCEPTS
HeadquartersAn der Gümpgesbrücke 17, 41564 Kaarst
Other locationsPrague (CUBE CONCEPTS s.r.o.) and Palma de Mallorca (CUBE CONCEPTS S.L.). All locations
Employeesover 45
Realized energy projectsover 150, throughout Europe
Countries with implemented and active projectsGermany, Austria, Great Britain, Spain, the Czech Republic, Hungary and Poland. Able to operate throughout Europe. More about international projects
PhotovoltaicsRooftop systems from 500 kWp, purchase or Contracting
Battery storagefrom 750 kW, purchase or Contracting in the CPFS operating model

Services

Photovoltaics and battery storage

Photovoltaics

Rooftop systems from 500 kWp for your own consumption, as a purchase or through Contracting. With Contracting, CUBE CONCEPTS makes the investment; you buy the solar power at a fixed price for 20 years and cut your electricity costs by up to 30 %.

Battery storage

Storage systems from 750 kW for peak shaving, balancing energy and electricity trading, in the CUBE Profit Flex Solution (CPFS) operating model. With a purchase, you receive 100 % of the net market revenues; with Contracting, CUBE CONCEPTS invests and you receive 25 %.

Working method

This is how we work

A contractual partner

Your partner for the entire project is CUBE CONCEPTS. CUBE CONCEPTS commissions and coordinates all the implementing partners, from the analysis phase through planning and construction to commissioning.

Planning with real data

The basis of any planning is the measured consumption data for your site in 15-minute increments.

Manufacturer-independent

Components are put out to tender for each site, with at least three competing offers for battery storage systems.

Open calculation

Each offer shows the full cost breakdown before you make your decision.

Our values: Pragmatism and implementation strength. Quality and ambition. Commitment and partnership.

Over 45 experts at three locations

We are the interdisciplinary team at CUBE CONCEPTS: Over 45 minds across three locations, driving the transition to CO₂-neutral energy supply every day. The mix of different generations, cultures, and expertise makes us a dynamic and innovative partner. Get to know the people who will lead your energy project to success.

Development since 2020

From the first plant to over 150 energy projects

In June 2020, the first photovoltaic system under Contracting was connected to the grid. Today, CUBE CONCEPTS has completed more than 150 energy projects across Europe, employs more than 45 people and works from three locations.

2020

Eigenstrom Direkt GmbH is founded on 28 April. On 5 June, the first photovoltaic system under Contracting is connected to the grid.

2021

Eigenstrom Direkt becomes CUBE CONCEPTS. Financing partnership with SUSI Partners for Contracting systems. Own office in Spain.

2022

The first institutional investor has entered the market. Contracts for photovoltaic projects with a capacity of 60 MW have been signed by the end of the year.

2023

Largest individual contract to date: photovoltaic for an internationally operating plant construction company, with the start of operations at 2 locations with over 5.5 MW. Framework agreement with a globally operating automotive supplier.

2024

Start of photovoltaic power generation at four locations of one of the world's leading automotive suppliers. Awarded the „Top Employer“ title with the highest rating. Office opened in Prague.

2025

Start of the battery storage project in Raskovice, Czech Republic, with over 3 MWh. Start of construction of the 1 MWp photovoltaic system for Purem by Eberspächer in Rakovník, Czech Republic.

2026

Further investors for the portfolio in Eastern Europe. Acquisition of the battery storage project in the Tušimice Energy Park in the Czech Republic with 50 MW / 100 MWh, commissioning planned in the first quarter of 2027. Expansion of sales in Palma de Mallorca.

View all milestones

References

References and partners

A selection from our references: two photovoltaic systems, one under Contracting and one purchased, and the battery storage system in the Tušimice energy park. The references page shows all projects with output, electricity yield and CO₂ savings.

The partner network of CUBE CONCEPTS covers financing, grant advice and experts, construction and execution, as well as maintenance and repair.

View all references with metrics

PV Purem by Eberspeacher
Wilsdruff

Purem by Eberspächer

Model:

CUBE Contracting

Solar power system:

1.9 MWp

Square meters:

9,231 m²

Electricity generation:

1,864,111 kWh/year

CO₂ savings:

1,192,882 kg/year

Model:

Power:

Capacity:

Commissioning planned:

Amortization:

Photovoltaic system at the Siegenia plant (aerial view)
Wilnsdorf

Siegenia-Aubi KG

Model:

CUBE purchase

Solar power system:

2.41 MWp

Square meters:

12,069 m²

Electricity generation:

2,293,110 kWh/year

CO₂ savings:

1,467,407 kg/year

Model:

Power:

Capacity:

Commissioning planned:

Amortization:

Construction site of the energy project in Tušimice, Czech Republic (aerial view)

Under construction

Tušimice

Cube Concepts

Model:

Power:

50 MW

Capacity:

100 MWh, first expansion phase

Commissioning planned:

Q1 2027

Amortization:

Partner network

Questions and answers

Frequently asked questions about CUBE CONCEPTS

What does CUBE CONCEPTS do?

CUBE CONCEPTS plans and builds rooftop photovoltaic systems from 500 kWp and battery storage systems from 750 kW for industry and commerce, as a purchase or through Contracting.

Since when has CUBE CONCEPTS existed?

Since April 2020. The company was founded on April 28, 2020 as Eigenstrom Direkt GmbH and has been operating under the name CUBE CONCEPTS since 2021.

Where is CUBE CONCEPTS located?

The headquarters is in Kaarst near Düsseldorf. Other locations are Prague and Palma de Mallorca.

In which countries is CUBE CONCEPTS active?

There are implemented and active projects in Germany, Austria, Great Britain, Spain, the Czech Republic, Hungary and Poland. CUBE CONCEPTS is operationally active throughout Europe.

At what size does CUBE CONCEPTS implement projects?

Photovoltaics from 500 kWp, battery storage from 750 kW.

What is the difference between a purchase and Contracting?

With a purchase, you make the investment yourself and the system belongs to your company. With Contracting, CUBE CONCEPTS invests: for photovoltaics, you buy the electricity at a fixed price for 20 years; for battery storage, you receive 25 % of the net market revenues.

Is CUBE CONCEPTS tied to a manufacturer?

No. Components are put out to tender for each site, with at least three competing offers for battery storage systems.

Contact us

Are you planning an energy project?

Talk to us about your site and the right model, purchase or Contracting.

Request a project

Solar carports - aerial view

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