LEG photovoltaics in Zug: WWZ requirements 2026

Producers, consumers and storage operators in the same WWZ grid area, within one municipality and on the same network level NE7 or NE5 can participate. The LEG may not use a voltage level above 36 kV. WWZ confirms whether the buildings actually belong together only in the technical review after registration.

WWZ’s conditions require a generation-capacity-to-connection-capacity ratio of at least 5%. Planned PV capacity must therefore be compared with the connection data of all participating consumption points. There is no universal kWp figure because connection capacity is property-specific.

Yes. Under WWZ’s conditions, all LEG participants must have an intelligent WWZ metering system; generation and storage systems also require a separate metering point. If WWZ must retrofit a meter, the conditions allow up to three months from registration, and participation starts only after installation.

WWZ grants a 40% reduction on the grid-use charge for LEG electricity when all members are connected at the same network level and no transformation is needed. If transformation is required, the reduction falls to 20%. The 2026 metering tariff sheet additionally states a CHF 0.50 surcharge per LEG meter per month; the reduction is not a blanket discount on every electricity bill.

Illustration, not a forecast: assume 5,000 kWh of LEG electricity are attributed to one WWZ LEG metering point during the year and the WWZ 2026 Base tariff for private and small commercial customers applies, with a CHF 0.0935/kWh (9.35 cents) ex-VAT variable network-use energy charge. At 40%, that tariff line falls by 5,000 × CHF 0.0935 × 0.40 = CHF 187 per year before VAT. The published tariff adds CHF 0.50 per month, or CHF 6 per year, for one active LEG meter; the arithmetic difference across these two items is CHF 181 using the published tariff values. At 20%, it is CHF 93.50 less CHF 6, or CHF 87.50. This is not total savings: it excludes the price for LEG electricity agreed internally, the monthly base charge, system services, other levies, the specific VAT treatment and internal accounting costs. The actual metered LEG volume, WWZ grid area and discount category confirmed by WWZ determine the result.

For network level 7, first use WWZ’s grid-topology check as guidance and then submit the LEG registration. For network level 5, WWZ provides information through its contact form. Notification must be made at least three months before planned commissioning; the case becomes binding only through the technical review after registration.

The LEG itself is responsible for internal settlement of locally exchanged electricity. WWZ records the relevant metering data, determines the LEG electricity shares and bills each participant for grid imports, metering services and charges. Internal prices, the billing solution and responsibilities must therefore be defined before registration.