Background
#A balcony solar system in Nidwalden may be installed and connected without a permit in the EWN supply area up to 600 W inverter output, but it must be reported to EWN.
The standard case is a plug-in system; EWN requires its notification form and a declaration of conformity. Tenants and condominium owners should clarify the owner’s consent, and the municipality must be involved where building work is affected. EWN requires an intelligent meter for remuneration and pays once a year from the next billing period. Above 600 W inverter output or with another grid operator, this simplified route does not apply.
What matters in the canton of Nidwalden
#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.
The process in six steps
#Tick off for your project
Identify the supply area and property
check 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.
Clarify the right to install
tenants 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.
Set the technical limit
before 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.
Complete the EWN form
enter 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.
Send the notification to EWN
email 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.
Keep metering and changes up to date
account 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.
Checked for your roof, not just read up on
Once the framing is clear, a property-specific check with roof, grid and documentation is worthwhile.
Frequently asked questions
#Sources
#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.