Short answer
Do I need a permit for balcony solar in Nidwalden?
In the EWN supply area, EWN allows plug-in solar systems up to 600 W inverter output without a permit, but they must be reported. Before installation, clarify owner consent and any municipal building requirements. EWN remuneration requires the form, declaration of conformity and IBAN, as well as a smart meter; payment is made annually from the next billing period.
Important
As of 24 August 2026, the “without a permit” statement applies according to EWN only to plug-in systems up to 600 W in the EWN supply area. For higher inverter output, another grid operator or special building circumstances, this simplified route must not be assumed; clarify the specific process separately with the grid operator and municipality.
At a glance
Key figures: Balcony solar Nidwalden
| Metric | Value |
|---|---|
| Output limit | Maximum inverter output of 600 W |
| Notification office | EWN form sent to netzanschluss@ewn.ch |
| Technical proof | Attach a declaration of conformity |
| Remuneration | Once a year from the next billing period |
| Metering requirement | Intelligent meter (smart meter) for remuneration |
Decision points
What determines the right path.
Responsibility determines the notification route: the 600 W rule comes from EWN’s information for the EWN supply area. If another local grid operator serves the property in Nidwalden, the notification must be checked separately with that operator.
Inverter output is the hard limit: according to EWN, plug-in systems up to a maximum of 600 W may currently be installed and connected without a permit. Above 600 W, this simplified classification must not be transferred to the larger PV system.
Ownership can delay the start: EWN requires tenants to inform the landlord and condominium owners to inform the condominium owners’ association. Obtaining consent before installation helps prevent a visible balcony or facade system from having to be removed later.
Technical proof is part of the notification: EWN’s form requires the inverter output, capped at 600 W, and an attached declaration of conformity. Without these two items, EWN cannot fully assess the plug-in system.
Remuneration depends on the metering setup: EWN’s form lists an intelligent meter as a requirement. Payment is made once a year and implemented from the next billing period, so remuneration must not be budgeted as certain without a smart meter.
Funding is separate from the grid process: EWN states that balcony solar systems are not eligible for funding. The system may still require notification, and remuneration depends on EWN’s notification and metering process.
Sequence
How the project stays cleanly managed.
- 1
Identify the supply area and propertycheck the electricity bill to confirm that EWN is the responsible grid operator and have the object ID ready. The 600 W rule and EWN form apply to the EWN supply area, not automatically to every address in Canton Nidwalden.
- 2
Clarify the right to installtenants should inform the landlord and condominium owners should inform the condominium owners’ association. If the system is fixed to a balcony, facade or roof, also clarify with the responsible municipality whether a building-law step is required.
- 3
Set the technical limitbefore ordering, confirm that the inverter output is no more than 600 W and that a declaration of conformity is available. These two points form the EWN-relevant basis for the plug-in system.
- 4
Complete the EWN formenter the owner’s details, address, contact information, IBAN and the object ID from the electricity bill, state the inverter output and attach the declaration of conformity. Then sign the form.
- 5
Send the notification to EWNemail the signed form to netzanschluss@ewn.ch. EWN processes the notification; for remuneration, the tariff is implemented from the next billing period if the metering requirement is met.
- 6
Keep metering and changes up to dateaccount for the intelligent meter for remuneration and plan for the annual payment. Notify EWN of a move or dismantling; EWN’s documents expressly require these changes to be reported.
Checklist
Questions to settle before the quote.
- Check the EWN supply area and object ID on the electricity bill before notifying
- Check the 600 W inverter limit and declaration of conformity before ordering
- Clarify landlord or condominium-owner consent and municipal rules for building work
- Plan for the smart meter, annual remuneration and notification of a move or dismantling to EWN
FAQ
More questions: Balcony solar Nidwalden
Sources
Official sources & references.
The responsible authorities are decisive. Always verify binding details – amounts, deadlines and conditions – for your specific property against the current status of the respective authority.
- Plug-in solar systems / Plug & Play up to 600 WNidwalden Electricity Utility (EWN)
- Plug & Play photovoltaic system notificationNidwalden Electricity Utility (EWN)
- Remuneration for solar electricityNidwalden Electricity Utility (EWN)
- Solar energy: self-consumption and feed-inSwiss Federal Office of Energy (SFOE)