Short answer
When should I involve SAK for a PV system in Appenzell Ausserrhoden?
A PV system in SAK’s Appenzell Ausserrhoden grid area needs a technical connection request before installation, followed by an installation notice from the electrical installer. Commissioning requires a complete implementation diagram, declarations of conformity and the required test and safety documents. Storage, charging infrastructure and self-consumption change the grid and metering assessment.
Important
As of 25 July 2026, this process describes the SAK grid area in Appenzell Ausserrhoden. An approved TAG under the 2025 Swiss utility rules remains valid for only six months unless an installation notice follows in time; another grid operator applies its own forms and deadlines.
At a glance
Key figures: PV grid connection AR
| Metric | Value |
|---|---|
| Sequence | TAG before the installation notice |
| TAG validity | Six months until the installation notice |
| SAK documents | Implementation diagram, data sheet and declaration of conformity |
| Extensions | Align storage and wallbox separately on the technical side |
| DC installation | Additional safety certificate where carried out by the system supplier |
Decision points
What determines the right path.
Who handles the inspection and safety certificate? In the SAK process, the electrical installer performs the final inspection before definitive operation and records the results in the safety certificate. If the system supplier installed the DC side, that supplier provides an additional safety certificate. Both go to SAK. Before awarding the work, record who carries out each installation and supplies its documents.
Which extra document does SAK require for a battery? SAK requires a commitment declaration for energy storage in addition to the test protocol. Ask the installer to check the current form, settings and registered system before commissioning. A battery-capacity data sheet does not replace this declaration.
Does the SAK process apply to every address in Appenzell Ausserrhoden? The process described here applies to connections in the SAK grid area. Confirm the distribution grid operator for the specific address using the network bill or a direct enquiry. For another operator, use its forms and connection conditions; the canton name alone does not determine the grid operator.
Grid-parallel operation is the first technical decision. The 2025 Swiss utility rules require a technical connection request (TAG) for generating systems operated in parallel with the low-voltage grid before the installation notice. Without this sequence, SAK cannot assess feed-in, inverter data and grid impacts against the planned system.
The six-month TAG period controls the schedule. Under the 2025 Swiss utility rules, an approved technical connection request expires if the declared system is not followed by an installation notice within six months. This particularly affects projects where roof renovation, delivery and electrical work move on different timelines.
The installation notice belongs before work starts. For connecting a generating system to the low-voltage grid, the 2025 Swiss utility rules require an early installation notice from the installer; SAK additionally specifies an implementation diagram. Electrical planning must therefore use the same capacity and metering data as the TAG before installation is released.
Documents are more than a formality. SAK requires a data sheet and declaration of conformity for the PV installation; the 2025 Swiss utility rules additionally specify a principle diagram with metering arrangement and data sheets and declarations of conformity for modules and inverters. Without these details, the metering and protection concept cannot be assessed reliably.
Storage and charging infrastructure are separate grid topics. The 2025 Swiss utility rules require a TAG not only for grid-parallel generating systems but also for electrical energy storage and electric-vehicle charging infrastructure. Anyone adding storage or a wallbox after the PV TAG must align the technical assessment with SAK again.
Commissioning ends with a verifiable electrical installation. ESTI Directive No. 220 places generating systems within the notification and inspection process under the Low-Voltage Installations Ordinance; SAK requires a safety certificate for PV systems where the system supplier carried out the DC installation. Responsibilities for inspection, measurement records and documentation must be clear before handover.
Sequence
How the project stays cleanly managed.
- 1
Record the system boundariesdocument the building connection, planned inverter capacity, modules, storage, wallbox, self-consumption and feed-in with the electrical specialist. The 2025 Swiss utility rules treat grid-parallel generation, storage and charging infrastructure as installations requiring a TAG.
- 2
Submit the TAG to SAK before the installation noticethe installer presents the technical design; for PV, the 2025 Swiss utility rules list, among other items, a site plan, principle diagram with metering arrangement, technical data and details of the self-consumption or remuneration model.
- 3
Check the approved TAG against the construction schedulealign the six months to the installation notice under the 2025 Swiss utility rules with roof work, material delivery and the electrical appointment. If a delay becomes likely, clarify the grid process before the period expires.
- 4
Submit the installation notice and implementation diagram before installation: SAK requires the notice from the electrical installation company; the implementation must match the TAG, inverter and module documents, and metering concept. Changes to capacity, storage or operating mode belong in this technical update.
- 5
Install the PV system and secure the inspection evidenceretain the system data sheet and declaration of conformity as required by SAK. Where the system supplier carried out the DC installation, SAK requires an additional safety certificate; ESTI Directive No. 220 governs the notification and inspection process for the generating system.
- 6
Complete commissioning and meteringbefore handover, align feed-in, self-consumption and the required metering with SAK. Where compensation for surplus electricity is requested, SAK checks whether the necessary metering can be installed; only a complete dossier documents operations and later extensions reliably.
Checklist
Questions to settle before the quote.
- Submit the technical connection request to SAK before the installation notice
- Factor the six-month validity of an approved connection request into the installation date
- Bring together the implementation diagram, declarations of conformity and safety certificates
- Align metering, self-consumption and feed-in with SAK before commissioning
FAQ
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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.