Short answer
What you need to know first.
For a PV system in Basel-Stadt, the connection request and metering concept must be aligned with IWB before installation. After construction come the electrical inspection with an NIV safety certificate and the commissioning data for Pronovo. Self-consumption or a ZEV changes the metering concept, not the need to coordinate grid approval and electrical work properly.
Important
As of 14 July 2026, a PV system must not be treated as grid-feasible merely because a quotation or funding plan exists. IWB’s current technical assessment and requirements for the specific connection point are decisive; for protected properties, the building authority also remains responsible.
Decision points
What determines the right path.
IWB is the specific grid partner in Basel-Stadt: connection capacity, inverter data and feed-in concept must align in the connection request. Without them, IWB cannot conclusively assess grid compatibility and the appropriate metering concept.
The NIV does not separate installation from the safety certificate: for low-voltage installations subject to inspection, the certificate forms part of the statutory control system. The electrical specialist must therefore plan testing and documentation before acceptance.
Self-consumption is a metering decision. With several consumers or a ZEV, the metering concept agreed with IWB determines which energy is consumed behind which meter or fed back into the grid.
Pronovo is not the grid operator: incentive and guarantee-of-origin processes require commissioning data from the completed system, but do not replace IWB’s technical review.
Installation timing depends on the grid decision. Ordering early can become problematic if IWB requires technical adjustments or a different metering concept for the planned feed-in capacity.
Basel-Stadt also has construction-law procedures. An IWB connection decision replaces neither the review of protected properties nor any notification or permit process required by the competent building authority.
Sequence
How the project stays cleanly managed.
- 1
Set the project basisrecord the Basel-Stadt address, module capacity, inverter, planned feed-in and consumers. Include the load profile at this stage when a battery, wallbox or heat pump is planned.
- 2
Prepare the IWB connection requestthe electrical specialist submits technical data and the intended metering concept before installation. IWB can assess connection and feed-in only on this basis.
- 3
Incorporate the grid response into executionmatch IWB’s confirmation, conditions and any adjustments with inverter parameters, meter location and schedule before materials are finally committed.
- 4
Run construction law and incentives in parallelschedule Basel-Stadt’s notification or permit path and any Pronovo process separately. Neither path replaces IWB’s connection approval.
- 5
Document installation and testingafter installation, the authorised specialist prepares the required test records and NIV safety certificate for the installation subject to inspection.
- 6
Complete commissioningimplement the meter and metering concept with IWB, operate the system only in the agreed state and document final system data for Pronovo.
Checklist
Questions to settle before the quote.
- Submit the connection request with capacity, inverter data and feed-in concept before installation
- Define the metering concept for self-consumption, ZEV or separate feed-in with IWB
- Build the NIV safety certificate and test record into acceptance planning
- Prepare the Pronovo commissioning notification only with final system data
FAQ
Common questions on this topic.
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.