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TL;DR
ESTI is the Swiss federal authority relating to the safety of electrical installations and installation authorizations. For a buyer, the main thing is to check who carries out the electrical work, who signs the OIBT checks and who coordinates the DSO connection.
Definition
The ESTI (Eidgenössisches Starkstrominspektorat / Federal Inspection for High-Current Installations) is the competent federal authority for the safety of electrical installations in Switzerland, including photovoltaic installations.
Authority
Federal (Confederation)
Approval required
AI (Authorization to Install)
Verification
esti.ch
Reference standard
NIN / RESI
ESTI issues installation authorizations to qualified electrical companies and intervenes within the framework of electrical safety. For solar, connections and controls must follow OIBT, applicable standards and DSO conditions. Equipment must comply with relevant standards; ask for the forms and certificates rather than a vague promise.
In French-speaking Switzerland, many solar players work with an authorized electrical company. Check in the quote who holds the authorization, who signs the safety report and who remains responsible if the electrical part is subcontracted.
Related guides
Ask for the name of the company carrying out the electrical work, its authorization and the person responsible for the safety report. If the electrical part is subcontracted, this responsibility must be written in the quote.
He can participate in mechanical installation if the site is organized correctly, but electrical connections, checks and signatures must remain the responsibility of an authorized company.
Sources & method
Check equipment values in the offered model’s datasheet and warranty terms. Confirm grant, permit and connection requirements with the responsible programme, municipality and grid operator.
This content is for information only. For your project, verify prices, grants, timelines, permissions and expected returns with the relevant authorities, grid operator and installer, and check the applicable contracts.
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Estimate output, avoided purchases and payback using your data. Confirm the assumptions in a quote.
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