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TL;DR
The DSO is your local electricity supplier and low voltage network operator. It manages the connection of your solar installation, the bidirectional meter and the surplus purchase tariff. In French-speaking Switzerland: SIG (GE), Romande Energie (VD/VS), etc.
Definition
The GRD (Distribution Network Manager) is the local operator of the low and medium voltage electricity network. He is responsible for connecting the photovoltaic installations, reading the meter and paying the injection fee.
GRD Geneva
SIG
GRD Vaud/VS
Romande Energie
Connection delay
4–12 weeks
Injection price
CHF 0.07–0.10/kWh
The grid operator is determined by the network area serving your address. Households and other small consumers using less than 100 MWh per year currently cannot freely choose their electricity supplier; they receive basic supply. Grid operation and electricity supply are distinct functions. Check connection, metering and surplus remuneration for your address.
Main DSOs in French-speaking Switzerland: SIG (Geneva, the entire canton), Romande Energie (Vaud, Valais, Fribourg partially), EWZ partially, Industrial Services of various municipalities. The connection time varies from 4 to 12 weeks depending on the DSO and the workload.
Related guides
Yes. The installer generally does this for you: he submits the connection request to the DSO, who sends a technician to install/configure the bidirectional meter before commissioning.
Legally no, unless your installation exceeds the capacities of the local network (rare in residential settings). In practice, the DSO may request technical adaptations (NA protection, meter type).
Sources & method
Check equipment values in the offered model’s datasheet and warranty terms. Confirm grant, permit and connection requirements with the responsible programme, municipality and grid operator.
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