Background
#In Basel-Stadt, a PV grid connection normally starts with a complete connection request to IWB before the system is installed.
As the local grid operator, IWB reviews the proposed connection and metering data; only then should electrical work and commissioning be scheduled firmly. After installation, the acceptance documents must include a safety certificate for installations subject to the Low-Voltage Installation Ordinance. Pronovo separately needs the final system data and commissioning notification. With self-consumption, a ZEV or limited feed-in capacity, the metering and operating concept must also be aligned before ordering.
What matters in the canton of Basel-Stadt
#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.
The process in six steps
#Tick off for your project
Set the project basis
record 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.
Prepare the IWB connection request
the electrical specialist submits technical data and the intended metering concept before installation. IWB can assess connection and feed-in only on this basis.
Incorporate the grid response into execution
match IWB’s confirmation, conditions and any adjustments with inverter parameters, meter location and schedule before materials are finally committed.
Run construction law and incentives in parallel
schedule Basel-Stadt’s notification or permit path and any Pronovo process separately. Neither path replaces IWB’s connection approval.
Document installation and testing
after installation, the authorised specialist prepares the required test records and NIV safety certificate for the installation subject to inspection.
Complete commissioning
implement the meter and metering concept with IWB, operate the system only in the agreed state and document final system data for Pronovo.
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.