General Terms and Conditions

ecoEn GmbH, Zurich | Valid from: August 2026
These conditions apply to all planning, deliveries, installations and services of ecoEn GmbH. How we handle your data is set out in our privacy policy. This English version is provided for convenience; in the event of any discrepancy, the German version prevails.

1. Scope and contracting parties

1.1 Contracting parties. These General Terms and Conditions (hereinafter «GTC») apply to all contracts, planning, offers, deliveries, installations and services between ecoEn GmbH, Rothstrasse 5, 8057 Zurich (hereinafter «ecoEn»), and its customers – both private individuals and companies.

1.2 Exclusivity. Deviating, conflicting or supplementary conditions of the customer do not become part of the contract unless ecoEn expressly agrees to their validity in writing.

2. Offer, project planning and conclusion of contract

2.1 Non-binding nature. Information on our website, in brochures and in digital initial consultations – including guideline prices and results of the solar calculator – is always subject to change and non-binding.

2.2 Validity of quotes. Written quotes prepared individually for the customer are valid for 30 days from the date of issue, unless expressly stated otherwise in the document.

2.3 Conclusion of contract. The contract (contract for work or service contract) is concluded as soon as the customer confirms the quote in writing or electronically – by e-mail or digital signature – and ecoEn does not reject the order in writing within five working days.

2.4 Intellectual property. All plans, feasibility studies, project designs, concepts and technical documents of ecoEn remain its intellectual property. They may not be reproduced or made accessible to third parties without prior written consent.

3. Scope of ecoEn's services

3.1 Content of services. The exact scope of services – energy consulting, planning, implementation, delivery, turnkey installation of photovoltaic systems, battery storage, heat pumps and charging stations, or construction management – is set out in the respective order confirmation or individual contract.

3.2 Involvement of third parties. ecoEn is entitled to involve qualified third parties, specialists or subcontractors to fulfil the contract.

3.3 Yield forecasts. Calculations of solar yields, self-consumption, CO₂ savings and financial payback are model-based simulations and forecasts. They do not constitute warranted characteristics. Weather, shading and individual user behaviour may lead to deviations.

4. Customer's obligations to cooperate

4.1 Binding nature of customer documents. Documents, plans, dimensions, structural calculations and technical information submitted by the customer are binding for planning and implementation by ecoEn. ecoEn is not obliged to check these documents for accuracy, currency or completeness. Additional costs or claims for damages arising from incorrect, incomplete or late customer documents are borne by the customer.

4.2 Access and structural requirements. The customer ensures at their own expense that the structural, legal and static requirements are met – in particular the load-bearing capacity of the roof or subsoil for PV systems and building services. They grant ecoEn and the commissioned subcontractors free, safe access to the property and the electrical installations.

4.3 Permits and notifications. Unless expressly agreed in writing as a service of ecoEn, obtaining all official permits – such as building notifications or heritage preservation clarifications – is the customer's responsibility. ecoEn is happy to support the customer with this for a separate fee.

5. Service and maintenance work

5.1 Contract term and termination. Unless otherwise agreed, service and maintenance contracts are concluded for a fixed term of twelve months. They are automatically extended by a further twelve months each time unless terminated in writing with three months' notice to the end of the contract term.

5.2 Scope of maintenance. Regular maintenance includes the inspection and cleaning work defined in the maintenance contract – for example visual inspection of the modules, software updates and functional testing of the inverter or heat pump. Not included are repairs, replacement of defective components and the rectification of damage caused by external influences such as hail, lightning, marten bites or grid overvoltage. Such work is invoiced separately on a time and materials basis.

5.3 Response times and spare parts. ecoEn endeavours to respond quickly to faults but is not liable for delays caused by manufacturer-related spare parts shortages or extreme weather events.

5.4 Unauthorised interventions. Warranty and service claims lapse if the customer or third parties not authorised by ecoEn carry out unauthorised repairs, modifications or interventions on systems maintained by ecoEn.

6. Prices and terms of payment

6.1 Currency and taxes. All prices are in Swiss francs (CHF). Statutory VAT is shown separately in quotes and invoices.

6.2 Payment plan for installation projects. Unless otherwise agreed in writing, the following payment plan applies to installation projects:

• 30% on final placement of the order or conclusion of the contract,
• 50% on delivery of the main components (e.g. modules, inverter, heat pump, storage) to the installation site,
• 20% after successful commissioning and acceptance.

Different terms may be agreed on a project basis; in any case, the arrangement in the quote or order confirmation is decisive.

6.3 Service billing. Annual maintenance and service flat fees are invoiced in advance at the beginning of each billing period.

6.4 Payment term and default. Invoices are payable net without deductions within ten days of the invoice date. After this period, the customer is in default without a separate reminder. Default interest of 5% and a reminder fee are charged.

6.5 Retention of title. All delivered equipment, components and materials remain the property of ecoEn until all claims have been paid in full. ecoEn is entitled to have a corresponding entry made in the competent register of retention of title at the customer's expense.

7. Delivery and installation dates

7.1 Binding nature. Dates and deadlines stated by ecoEn are guideline values. Binding fixed dates must be expressly agreed as such in writing.

7.2 Force majeure and delays. ecoEn is not liable for delivery or installation delays caused by force majeure, unsuitable weather conditions for roof and outdoor work (snow, ice, heavy rain, storm), official delays, delays by the local grid operator or global supply shortages of manufacturers. The performance deadlines are extended accordingly.

8. Acceptance and warranty

8.1 Acceptance report. After completion of the installation, a joint commissioning and technical acceptance takes place. A report is prepared and must be signed by both parties. Minor defects that do not significantly impair the safe functioning of the system do not entitle refusal of acceptance.

8.2 Statutory warranty. The provisions of the Swiss Code of Obligations (CO) apply. The warranty period for immovable works permanently connected to a building – such as installed solar systems and heat pumps – is five years from the date of acceptance.

8.3 Manufacturer warranties. Warranties that go beyond the statutory warranty for work – for example linear performance warranties for PV modules over 25 years or product warranties from inverter manufacturers – are granted directly by the respective manufacturers. ecoEn assigns these warranty claims in full to the customer upon acceptance. The handling of warranty cases outside the statutory warranty is chargeable unless a corresponding service contract exists.

9. Liability

9.1 Scope of liability. ecoEn is liable without limitation for damage resulting from intentional or grossly negligent breach of contract. Liability for slight and moderate negligence is excluded to the extent permitted by law.

9.2 Exclusion of consequential damage. Liability for indirect damage, third-party damage and consequential damage caused by defects – in particular lost profits, unrealised electricity savings, temporary loss of PV system yield in the event of an outage or damage caused by grid failures – is excluded to the extent permitted by law.

10. Data protection

10.1 Data processing. ecoEn processes customer and property data exclusively within the framework of the revised Swiss Federal Act on Data Protection (revFADP) and for the contractual processing of the order – including the necessary notifications to grid operators and incentive bodies. Data is not passed on to unauthorised third parties. Details are set out in our privacy policy.

11. Place of jurisdiction and applicable law

11.1 Applicable law. Swiss law applies exclusively to the entire contractual relationship between the customer and ecoEn. The provisions of the United Nations Convention on Contracts for the International Sale of Goods (Vienna Sales Convention, CISG) are expressly excluded.

11.2 Place of jurisdiction. The exclusive place of jurisdiction for all disputes arising from or in connection with contracts, deliveries and these GTC is the registered office of ecoEn GmbH in Zurich. ecoEn reserves the right to sue the customer at their place of residence or business. Mandatory statutory places of jurisdiction remain reserved.

Contact

ecoEn GmbH
Rothstrasse 5
8057 Zurich, Switzerland
E-mail: info@ecoen.ch
Phone: +41 78 830 83 35

As of: 25 August 2026 | See also: Legal notice & privacy