Your Property. Our Expertise.
Building . Values . Together .

Together we're shaping the energy transition through sustainable investments in charging parks, grid-scale storage and renewable energy plants.

Our Service Offerings

XTRA-E® Project

XTRA-E® plans, organizes & accompanies – you benefit from day one. Start your risk-free planning now.

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XTRA-E® PV Planning

Behind every profitable photovoltaic system lies a well-thought-out plan. With XTRA-E® you receive your individual plan as a complete package

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XTRA-E® Project Work

XTRA-E® project management – implementing your energy strategy makes your company future-proof.

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Our Investment Programs

XTRA-E® mobility

Scale electromobility with powerful charging parks at traffic-optimized locations. Ideal for highway proximity and logistics centers.

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XTRA-E® storage

Stabilize power grids with intelligent battery storage solutions. Attractive returns through frequency regulation and spot market participation.

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XTRA-E® power plant

Clean energy generation on unused land. Long-term lease agreements with guaranteed compensation for landowners.

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Locations of the XTRA-E® Brand

Pan-regional presence in Germany, Netherlands, Belgium, Luxembourg and Switzerland – close to customers, partners and markets.

  • Erbach (D): Company Headquarters & Research Center
  • Bielefeld (D): Competence Center & Meeting and Presentation Center
  • Magdeburg (D): Coworking Space & Meeting and Presentation Center
  • Stuttgart (D): Coworking Space & Meeting and Presentation Center South Region
  • Aschaffenburg (D): Head of Project Management
  • Mainz (D): Coworking Space Real Estate
  • Mannheim (D): Coworking Space Real Estate & Meeting and Presentation Center
  • Frankfurt (D): Meeting and Presentation Center Central Region
  • Munich (D): Meeting and Presentation Center & Grid Connection Management
  • Düsseldorf (D): Meeting and Presentation Center
  • Hamburg (D): Meeting and Presentation Center North Region
  • Berlin (D): Meeting and Presentation Center & Financial Services
  • Rotterdam (NL): International Meeting and Presentation Center
  • Amsterdam (NL): International Meeting and Presentation Center
  • Bertrange (L): International Meeting and Presentation Center
  • Zurich (CH): International Coworking Space
  • Brussels (BE): International Coworking Space

The XTRA-E® brand is part of the Green Shark Group and operates from strategically selected locations in Germany and Europe. The decentralized structure enables short distances, fast response times and close cooperation with customers and partners.

XTRA-E® Locations in Germany and the Netherlands



XTRA-E® Investments for Private Investors

Invest securely in the energy transition – starting from €1,000 with attractive returns and maximum risk protection.

  • Attractive returns through direct participation: Benefit from growing demand for renewable energy with average yields of 3–6% p.a.
  • From €1,000 onwards: Low entry barrier – energy projects are now accessible to private investors too.
  • Future-proof investment: Investment in renewable energies such as solar, wind and storage technology – in demand today and tomorrow.
  • Transparent revenue models: Monthly or annual distributions with traceable revenue sources.
  • Take advantage of tax benefits: Many projects offer tax-privileged returns or depreciation opportunities.
  • Shape the energy transition: Your capital makes an impact – protect the environment while creating value.
  • Diversified project landscape: Risk diversification through participation in multiple regional and technologically different energy projects.
  • Expertise from 15+ locations: Technical and economic planning by experts from Erbach, Bielefeld, Munich & more – quality from first-hand.
  • Fixed feed-in tariffs (EEG): Long-term income security through legally guaranteed compensation for renewable electricity.
  • Long-term PPA contracts (Power Purchase Agreements): Additional income security through fixed purchase prices with industrial partners.
  • Independent audit & certification: All projects are reviewed by external experts for economic viability and technology.
  • Regular reporting tools: Online portals with real-time data on yield, operation and maintenance – full transparency for investors.
  • Legal security through German legal entities: Participation via German GmbH & Co. KG – clear legal framework and investor protection.

The XTRA-E® brand is part of the Green Shark Group and operates from strategically selected locations in Germany and Europe. The decentralized structure enables short distances, fast response times and close cooperation with customers and partners.

XTRA-E® Locations in Germany and the Netherlands



Attractive Opportunities for XTRA-E® Referrers & Partners

economic advantages, security, support and professionalism.

  • Fair and long-term commissions: Attractive, one-time and/or recurring compensation for every successful referral.
  • Exclusive partner regions: Secure your territory – no competing referrals from us or third parties.
  • Digital partner portal: Real-time tracking, document access and automated commission overview.
  • Complete contract and information documents: Legally sound documents, sample exposés, presentations and fact sheets ready for immediate use.
  • Training & webinars: Regular training on products, taxes and investor conversations.
  • Presentation appointments at the meeting center: Use our locations in Berlin, Frankfurt, Munich & Rotterdam for customer meetings and investor events.
  • No liability risk: As a referrer, you operate within the scope of the strict prospectus requirement – we provide the complete documentation.
  • Marketing support: Joint campaigns, lead generation and professional advertising materials.

The XTRA-E® brand is part of the Green Shark Group and operates from strategically selected locations in Germany and Europe. The decentralized structure enables short distances, fast response times and close cooperation with customers and partners.

XTRA-E® Locations in Germany and the Netherlands



Privacy Policy

Status: May 2025 | Information obligations pursuant to Articles 13 and 14 GDPR

1. Controller

The controller responsible for processing personal data within the scope of this website is:

Green Shark Group
In den Rosengärten 27
64711 Erbach
Germany
Email: DSGVO
Phone: +49 6021 422 9164 0
Represented by: Thomas Heilmann

2. Contact Details of the Data Protection Officer

Our company data protection officer is available to answer your questions or concerns regarding data protection:

Thomas Heilmann
Email: DSGVO
Postal Address: In den Rosengärten 27, 64711 Erbach, Germany

3. General Information on Data Processing

We process personal data of our users only to the extent necessary to provide a functional website as well as our content and services. The processing of personal data is always carried out in accordance with the General Data Protection Regulation (GDPR) and the applicable national data protection regulations.

Processing of your data takes place:

  • Pursuant to Article 6 (1) lit. a GDPR based on your consent
  • Pursuant to Article 6 (1) lit. b GDPR for the performance of a contract or pre-contractual measures
  • Pursuant to Article 6 (1) lit. f GDPR to safeguard legitimate interests

4. Collection of Personal Data When Visiting the Website

Each time our website is accessed, our system automatically collects data and information from the computer system of the accessing end device. The following data is collected:

  • IP address of the user
  • Date and time of access
  • Name and URL of the retrieved file
  • Website from which the access was made (referrer URL)
  • Browser type and version
  • Operating system
  • Language settings
  • Screen resolution

The data is stored in the log files of our server. Storage of this data together with other personal data of the user does not take place.

The legal basis for the temporary storage of the data is Art. 6 (1) lit. f GDPR. The purpose of data storage is to ensure the functionality of the website as well as the detection and prevention of attacks. Evaluation for marketing purposes does not take place.

The data is deleted as soon as it is no longer required to achieve the purpose of its collection. In the case of data collection for the provision of the website, this is the case when the respective session is ended.

5. Contact Form and Email Contact

You can contact us via our contact form or by email. The data transmitted in this process (e.g. name, email address, phone number, message text) is stored for processing your request.

The legal basis is Art. 6 (1) lit. f GDPR. If the contact serves contract initiation, the additional legal basis is Art. 6 (1) lit. b GDPR.

Your data will only be forwarded to internally authorized persons and will not be disclosed to third parties unless there is a legal obligation or you have given explicit consent.

The data will be deleted as soon as it is no longer required to achieve the purpose of its collection, usually after the communication has ended, but no later than 6 months, unless statutory retention periods prevent this.

6. Cookies

Our website does not use cookies for tracking or marketing purposes. Only technically necessary cookies (session cookies) are used to enable the use of certain functions (e.g. contact form).

These cookies are automatically deleted after the end of the browser session. Storage beyond the session does not take place.

The use of technically necessary cookies is based on Art. 6 (1) lit. f GDPR. They serve user-friendliness and the secure functionality of the website.

You can deactivate or delete the storage of cookies in your browser settings at any time. Deactivation may restrict the functionality of the website.

7. Google Maps (if used)

We use Google Maps (provider: Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland) on our website to display maps and create directions.

When Google Maps is called up, data is transmitted to Google's servers (e.g. IP address, location). We point out that Google may process this data in the USA. Google has an adequate level of data protection according to the EU-US Data Privacy Framework (DPF).

The use of Google Maps is in our legitimate interest in a user-friendly presentation of our locations (Art. 6 (1) lit. f GDPR).

Further information on the handling of user data can be found in the Google Privacy Policy.

8. Rights of Data Subjects

You have the following rights regarding your personal data:

  • Right of access pursuant to Art. 15 GDPR
  • Right to rectification of incorrect data (Art. 16 GDPR)
  • Right to erasure ("right to be forgotten", Art. 17 GDPR)
  • Right to restriction of processing (Art. 18 GDPR)
  • Right to data portability (Art. 20 GDPR)
  • Right to object to processing (Art. 21 GDPR)

If you wish to exercise any of these rights, please contact the contact details mentioned above.

You also have the right to lodge a complaint with a data protection supervisory authority regarding our processing of personal data. The competent authority is the data protection authority of your habitual residence, your workplace or our company headquarters.

9. Data Security

We take comprehensive technical and organizational measures to protect your personal data against accidental or intentional manipulation, loss, destruction or access by unauthorized third parties. Our security procedures are regularly reviewed and adapted to the state of the art.

Data transmission takes place via an encrypted HTTPS connection (SSL/TLS).

10. Changes to this Privacy Policy

We reserve the right to adapt this privacy policy in order to adjust it to changed legal or technical framework conditions. The respective current version can be accessed on this page at any time.

11. Severability Clause

Should individual provisions of this privacy policy be or become wholly or partially invalid, the validity of the remaining provisions shall remain unaffected. A valid provision that comes closest to the economic purpose of the invalid provision shall take its place.




General Terms and Conditions (GTC)

Status: May 2025 | Valid for the use of www.XTRA-E.com

1. Scope of Application

These General Terms and Conditions apply to the use of the website www.xtra-e.com, as well as www.xtra-e.de (hereinafter "Website") as well as to all offers, services and communication between users and the operator of the website.

The operator of the website is:

Green Shark Group
In den Rosengärten 27
64711 Erbach
Germany
Email: info@xtra-e.com
Phone: +49 (0)6021 422 9164 0
VAT ID: DE194805779
Managing Director: Thomas Heilmann

Deviating conditions of the user will not be recognized unless they have been expressly agreed to.

2. Use of the Website

The use of the website is generally freely accessible to all users. The operator provides the website and its content (texts, images, graphics, functions) to the extent technically and economically possible.

Each user undertakes to use the website exclusively for permitted purposes and in particular:

  • Not to disseminate illegal, offensive or indecent content
  • Not to perform automated queries (e.g. bots, scraping)
  • Not to launch attacks on the IT infrastructure (e.g. hacking, DDoS)
  • To respect copyrights and trademark rights of third parties

In case of violations, the operator reserves the right to block access and take legal action.

3. Offers and Services

The website serves to provide information about services in the field of renewable energies, in particular the leasing of land for solar systems.

All offers contained on the website are subject to change and non-binding. The operator points out that the information (e.g. on compensation, terms, locations) is non-binding and does not create any legal claims.

A contract is only concluded upon written confirmation (e.g. by email or signed contract).

4. Contact and Inquiries

Users can submit inquiries via the contact form provided on the website or by email. By submitting an inquiry, they agree that their personal data will be stored and processed for processing (see also Privacy Policy).

The operator endeavors to answer inquiries promptly, but assumes no liability for delayed or omitted responses.

5. Ownership and Copyright

All content of this website (texts, images, logos, graphics, software, layout) is protected by copyright and is the property of XTRA-E GmbH or licensed third parties.

Any reproduction, editing, distribution or use outside the narrow limits of copyright law requires the written consent of the rights holder.

In particular, downloading, copying or automated storage of content for commercial purposes is prohibited.

6. Limitation of Liability

The operator of the website does not assume any warranty for the correctness, completeness and timeliness of the information provided. Use is at your own risk.

Liability for damages that arise directly or indirectly from the use of the website is – insofar as legally permissible – excluded.

This does not apply in particular to:

  • Intentional or grossly negligent breaches of duty
  • Violation of life, body or health
  • Warranty promises or mandatory statutory liability (e.g. under the Product Liability Act)

7. External Links

The website contains links to external websites of third parties. The operator has no influence on their content and assumes no liability for them. The respective provider or operator is always responsible for the content of the linked pages.

Upon becoming aware of legal violations, such links will be removed immediately.

8. Amendment of GTC

The operator reserves the right to change or supplement these GTC at any time, in particular in the event of legal innovations or technical developments.

The respective current version can be accessed on this page at any time. Continued use of the website after publication of the amended GTC is deemed to be acceptance of these.

9. Severability Clause

Should individual provisions of these GTC be or become invalid or unenforceable, the validity of the remaining provisions shall remain unaffected. A valid provision that comes closest to the economic purpose shall take the place of the invalid provision.

10. Final Provisions

The law of the Federal Republic of Germany shall apply, excluding the UN Convention on Contracts for the International Sale of Goods (CISG).

The place of jurisdiction for all disputes arising from or in connection with the use of the website is – insofar as legally permissible – Berlin.

Consumers have the option of settling disputes via the EU online dispute resolution platform: https://ec.europa.eu/consumers/odr.




Legal Notice & Contact

Information according to § 5 TMG

  • Company: Green Shark Group
  • Brand: XTRA-E® – registered trademark (DPMA Reg. No. 30.2025.107.940)
  • Registered Office: In den Rosengärten 27, 64711 Erbach, Germany
  • Phone: +49 6021 422 9164 0
  • Email: info@xtra-e.com

Responsible for content according to § 55 para. 2 RStV:
Green Shark Group
In den Rosengärten 27
64711 Erbach, Germany

The XTRA-E® brand is a registered trademark at the German Patent and Trademark Office (DPMA).

Contact Form




XTRA-E® Storage Cashback

Intelligent battery storage uses arbitrage – high returns through digital energy market control.

  • Investment costs (Capex): €10,337,175.15
  • Connection capacity: 12.5 MVA
  • Cashback point in time: 4.36 years
  • IRR (10 years): 11.17%
  • ROI (10 years): 129.15%
  • Average annual return (10 years): 12.91%
  • IRR (20 years): 10.66%
  • ROI (20 years): 358.30%
  • Average annual return (20 years): 22.91%

With the XTRA-E® Storage Cashback model, the Green Shark Group offers a high-yield participation in future-proof battery storage systems. Through automated trading strategies on the energy market (arbitrage), high utilization and stable cash flow generation are achieved.

XTRA-E® Battery Storage Systems – Intelligent Energy Use

XTRA-E® Mobility Cashback

Charge your e-mobility – and benefit at the same time. Your charging station becomes a return object.

  • Investment costs (Capex): €1,480,494.75
  • Connection capacity: 2,500 kVA
  • Cashback point in time: after 6.23 years
  • IRR (10 years): 8.14%
  • ROI (10 years): 77.37%
  • Average annual return (10 years): 7.74%
  • IRR (20 years): 10.27%
  • ROI (20 years): 360.47%
  • Average annual return (20 years): 23.02%

The XTRA-E® Mobility Cashback model combines infrastructure for e-mobility with economic return. Charging parks are operated at strategic locations and made profitable through usage fees, cooperations and energy market integration.

Become an investor now
XTRA-E® E-Mobility – Charging Parks with Return Potential



XTRA-E® Planning Office

Professional PV planning for private, commercial & installation companies – complete, fast and cost-effective

  • Precise 3D visualization and animation
  • Site-specific yield simulation & shading analysis
  • Optimal design of modules, inverters and battery storage
  • Structural proof for the module construction
  • Electrical circuit diagram according to current standards
  • Export-ready parts lists for common substructure manufacturers
  • International planning – suitable for Germany, Austria, Switzerland and EU
  • Timely implementation – often within a few working days
  • Individual special requests by arrangement

Whether single-family home, commercial enterprise or large-scale project: Behind every profitable photovoltaic system lies a well-thought-out plan. With XTRA-E® you receive your individual plan as a complete package – without detours, without waiting times, without compromises. Our electrical engineers deliver turnkey PV plans tailored exactly to your requirements.

XTRA-E® PV Planning Office – Start your PV project with security, speed and clarity



XTRA-E® Project

Finally save – without excuses

You believe photovoltaics is too complicated, too expensive or "simply not your thing"?
Maybe that's just the story you tell yourself – to avoid having to decide.

The truth:
You don't need specialist knowledge. No time. No perfect roof.
Just one moment when you stop getting in your own way.

XTRA-E® checks free of charge and without obligation whether an economical solution can be found for your property –
without salespeople, without pressure, without hidden agenda.
Complemented by professional energy consulting for holistic assessment of consumption, storage needs and system economics.

Costs only arise upon implementation – clear, transparent and success-based.
Until then? Zero euros. Zero risk. Just facts.

Check for free now – in 90 seconds
XTRA-E® Project+ – PV planning and energy consulting from a single source



XTRA-E® Press Releases

Building . Values . Together

XTRA-E® Project+ – PV planning and energy consulting from a single source



XTRA-E® Partner Program

for craft businesses, service providers and agencies

The perfect cross-selling product for craft businesses such as painters, plumbing companies, carpenters, landscapers etc. & service providers such as insurance brokers, emergency locksmiths, caretaker services etc.

You are the perfect partner – without competition
You are in direct contact with customers who want to modernize, build or save. When the topic "photovoltaics" comes up, often just a brief hint is needed – and you create real added value.

With the XTRA-E® partner program, you become a referrer – and receive an individual bonus for each successful recommendation. No effort. No liability. No sales.

How it works

  • Customer mentions interest in solar, storage or wallbox
  • You forward them by email or via your own partner landing page
  • We carry out planning, consulting and implementation – manufacturer-neutral and transparent
  • Upon project completion, you receive your referrer bonus

Your tool – ready to use immediately

Add this line to your email signature:

💡 Photovoltaics? My partner XTRA-E® creates a free and non-binding neutral, high-quality plan – incl. shading analysis & yield calculation. → Recommendation: [yourname].xtra-e.de

Or simply use your landing page as a text link in your email signature
e.g.: ...You're the type of person who uses something like this – or?

Transparent framework conditions

  • Commercial partners: unlimited recommendations possible.
  • Bonus is agreed individually per project and documented.
  • All recommendations must be made via your personal landing page Your Landingpage.
  • Lucrative additional income with 1% referral commission on net order volume in case of success
Become a partner now
XTRA-E® Project+ – PV planning and energy consulting from a single source



6 years

average cashback

100%

Full Service Agreement

12 months

realistic implementation lead time

300kW+

guaranteed charging capacity

For Investors

Attractive investments in the energy infrastructure of the future.

  • Long-term stable returns through government-subsidized models
  • Portfolio diversification with tangible asset investments
  • Transparent projects with clear return forecasts
  • Professional asset management by our team
  • Low minimum participation – broad access to the energy transition
  • Minimum initial investment: From €1,000 possible
Become an investor
Investor Meeting



XTRA-E® mobility

Charge electricity, increase value – your charging station pays off.

  • High revenue potential through strategic locations with strong traffic volume
  • Complete takeover of planning, construction and commissioning by us
  • Long-term operator contracts with guaranteed operator fees
  • No self-investment – we finance and install the charging infrastructure
  • Complete operating service incl. monitoring, maintenance and customer support
  • Scalable operator models – from individual locations to comprehensive networks
  • Support with approvals, grid connection and funding
  • Future-proof expansion with state-of-the-art charging and long-term storage technology
Become an E-Mobility Charging Park Operator
Landscape with solar panels



XTRA-E® storage

Arbitrage with electricity: Intelligent storage, maximum return.

  • Attractive returns through active electricity price arbitrage on the exchange
  • Long-term cash flows through secured operating contracts and additional subsidies
  • Low correlation to the traditional capital market – ideal diversification
  • Technology and operational risk fully covered by experienced operator
  • Scalable investment models – from individual systems to portfolio solutions
  • Transparent profit sharing and digital monitoring in real time
  • Future-oriented investment in the energy transition and decentralized infrastructure
Become an Energy Arbitrage Trader
Investor Meeting



XTRA-E® power plant

Forward-looking power plants. Sustainable energy. Above-average return.

  • High, long-term returns through stable revenues from EEG subsidies or PPA contracts
  • Investment in climate-neutral energy of the future with increasing demand
  • Low operating risk through professional asset and facility management
  • Complete project development from a single source – from planning to operation
  • Attractive subsidies and tax depreciation opportunities
  • Transparent participation models with regular reporting and performance updates
  • Contribution to the energy transition with measurable ecological impact
Become a Green Energy Manufacturer
Landscape with solar panels



XTRA-E® Project Management

Implementing your energy strategy makes your company future-proof.

  • Tailor-made energy concepts for your company
  • Increase energy efficiency & reduce operating costs
  • Identification of savings potential through detailed energy analyses
  • Integration of renewable energies and self-consumption optimization
  • Implementation of measures from energy management systems (e.g. ISO 50001)
  • Funding advice and support with applications
  • From consulting to implementation – everything from a single source
Become an investor
Investor Meeting



For Landowners

Lease your land and become part of the energy transition.

  • Long-term lease agreements with guaranteed compensation
  • optional purchase option for your land
  • No investment risk for you as the owner
  • We take over planning, approval and operation
  • Dismantling of the systems after contract termination included
Have area checked
Landscape with solar panels

Ready for the next step?

Contact us for a non-binding consultation on investments or your photovoltaic project.

Photovoltaic check for free Schedule appointment