Acceptance continues beyond app activation: technical records support production checks, warranty claims and a later property sale. Check the site data and official sources before signing.
Decision to make
Acceptance continues beyond app activation: technical records support production checks, warranty claims and a later property sale. Adapt this decision to the building, your actual consumption and the project schedule.
For this project, start by identifying the grid operator, applicable tariff and site constraints. The quotation must specify the conditions affecting connection, metering or the value of surplus electricity.
Practical effects of the project
- The handover must include the final plan actually installed, the single-line diagram, the settings and the test reports, not just access to an application.
- Request models and serial numbers of modules, inverters, batteries, optimizers, protections and meters to exercise warranties later.
- The file must show the procedures: municipal announcement, request and response from the DSO, audit or OIBT report, commissioning and Pronovo.
- Product, performance, installation, waterproofing and after-sales service guarantees must indicate who is responsible, their duration and the complaints procedure.
- Monitoring IDs, exported data, shutdown training and exclusion list are part of the value delivered to the owner.
These points help assess the topic ‘ Handover of a solar installation: 15 documents to be required from the installer ’ without turning a national average into a local promise. Every decisive figure needs its source, date and scope.
Specific controls
- Reception signed only after submission of the final diagram and minutes.
- Serial numbers and transferable warranties kept outside of installer's account.
- Authorized power, meter, export settings and DSO contacts documented.
- Alarm, emergency stop and after-sales service procedure explained to the owner.
- Final installation plan with layout and installed power.
- Single-line diagram and protections actually installed.
- Commissioning report and control measures.
- OIBT report or certificate when required.
- Confirmation of connection and contact details of the DSO.
- Datasheets and configuration parameters.
- Product, performance, assembly and waterproofing guarantees.
- Complaints procedure and after-sales service manager.
- Access to monitoring, data export and account transfer.
- Inverter, injection and battery settings.
- Dated photos of the roof, panel and equipment.
The answers should appear in the quote or in a dated appendix. A verbal explanation is insufficient if it changes the price, expected output, financial support or a contractual obligation.
Compare quotes
- Tariffs: state the purchase price, surplus remuneration and fixed charges applicable to the site, with their source and date.
- Production: provide a monthly estimate with orientation, shading, losses and weather assumptions.
- Investment: separate material, installation, safety, scaffolding, connection, procedures and options.
- Aids: distinguish confirmed amount, estimate and deposit liability.
- Contract: specify guarantees, calendar, deposit, exclusions, maintenance and after-sales service.
Acceptance continues beyond app activation: technical records support production checks, warranty claims and a later property sale. In the comparison table, keep one column for the stated value, one for the evidence provided, and one for the effect of a less favorable hypothesis.
Cautious scenario
Test the project with slightly lower production, an unconfirmed grant and less favourable surplus remuneration. This scenario shows whether the decision remains sound based on self-consumption, roof quality and a controlled installed cost.
The main references used are SFOE - permits and low-voltage installations, Pronovo - Submit a photovoltaic subsidy application, OFEN/BFE - Connection conditions and remuneration 2026, Swissolar - Swiss Solar Monitor. They frame the method, but the local amounts and contractual conditions must be rechecked at the time the offer is signed.
Risks to be managed
Monitoring IDs, exported data, shutdown training and exclusion list are part of the value delivered to the owner. Ask who assumes this risk, what proof will be provided and how a change is handled after ordering.
A more expensive solution should meet a specific need in your project. Ask for a documented benefit and a separate price for each option.
Next step
Gather the address, annual consumption, future electricity uses and building documents. Then check the grid operator's conditions, available grants and site constraints; request quotations covering the same scope.
Acceptance continues beyond app activation: technical records support production checks, warranty claims and a later property sale. You can then decide with a documented net price, clear responsibilities and assumptions that each company can explain line by line.
Points to check
- Tariffs: Compare the tariff for your address with the Swiss ElCom median for 2026, keeping local prices separate from the national benchmark.
- Grants: Check the programme, eligibility, documents and deadlines with Pronovo, the canton or municipality. Include only confirmed contributions in your budget.
- Roof potential: Sonnendach is presented as a public pre-diagnosis, to be validated by a technical visit.
- ROI: the method separates self-consumption, injection, installed price, taxation and payment schedule.
- The handover must include the final plan actually installed, the single-line diagram, the settings and the test reports, not just access to an application.
- Request models and serial numbers of modules, inverters, batteries, optimizers, protections and meters to exercise warranties later.