ZEV, LEG, vZEV.
Which one applies to you?

If you’ve been following the Swiss energy news, you’ve probably seen these abbreviations thrown around. ZEV. LEG. vZEV. Sometimes in the same sentence. Occasionally by people who seem to be using them interchangeably when they very much aren’t.

They represent three distinct legal frameworks for how solar electricity can be shared in Switzerland. Each has different eligibility requirements, different geographic scope, different economics and different complexity. Choosing the wrong one — or not knowing you’re eligible for any of them — is expensive.

Here’s the plain-language version, followed by a decision tool that tells you which one actually applies to your situation.

The three models — properly explained

ZEV — Zusammenschluss zum Eigenverbrauch

The ZEV (Self-Consumption Consortium) is the original Swiss energy sharing model, in place since 2018. It allows multiple households in the same building or on the same parcel to pool their electricity consumption and share solar power from a rooftop installation. The key constraint: everyone must be connected through the same internal grid — no sharing across public network boundaries. The landlord or property owner typically sets up and manages the ZEV.

vZEV — Virtueller Zusammenschluss zum Eigenverbrauch

The vZEV (Virtual Self-Consumption Consortium), introduced from 2025, removes the requirement to replace physical meters. It achieves the same effect digitally, making it much easier and cheaper to set up for existing buildings. Same geographic constraint as the ZEV — participants must be in the same grid area — but far less bureaucratic overhead.

LEG — Lokale Elektrizitätsgemeinschaft

The LEG (Local Electricity Community), operational from January 2026, is the broadest model. Unlike ZEV and vZEV, LEG participants don’t have to be in the same building or even on the same parcel. As long as they’re within the same distribution network operator’s concession area, producers can sell and consumers can buy. This is the model Upgrid operates on — and the one that opens solar energy to renters who have no relationship with any particular building’s solar installation.

Side by side: ZEV vs vZEV vs LEG

The question nobody is asking but should be

Most content about ZEV vs LEG focuses on the technical differences. Here’s the question that actually matters: who controls the price?

In a ZEV or vZEV, the building owner (typically your landlord or Stockwerkeigentümergemeinschaft) decides what to charge for solar electricity. Swiss law says it can’t exceed the local grid tariff — but that still leaves significant room for pricing decisions that aren’t necessarily in the tenant’s interest. You’re swapping one monopoly for a slightly smaller one. For a full revenue comparison, see Feed-in Tariff vs LEG: the numbers.

In a LEG, the rate is negotiated and fixed in a contract between the community operator (Upgrid) and you. It’s transparently lower than the grid rate. It doesn’t depend on your landlord’s goodwill. And it scales as the community grows — the more producers join, the more of your consumption gets covered at the community rate.

If your building already has a ZEV or vZEV

Good news: you can still join an Upgrid LEG community on top of it. The two systems aren’t mutually exclusive. Your LEG membership covers electricity sourced from outside the building. Your ZEV/vZEV covers building-level solar. The combined effect is more of your total consumption covered at below-grid rates.

Do you need a smart meter? Here’s the honest answer.

Switzerland is in the middle of a national smart meter rollout. The legal target under the Energy Strategy 2050 is 80% of all households equipped by end of 2027. As of 2026, the rollout is behind schedule in many areas — most Swiss households still have traditional meters. This is normal and expected.

Smart meters are required for LEG participation because electricity allocation between producers and consumers happens in real time — the grid operator needs 15-minute consumption data from each connection point to calculate your community share. See how tariffs vary across Switzerland in our interactive electricity prices map. Without a smart meter, Upgrid cannot read your consumption remotely, and manual meter readings don’t provide the resolution needed.

How to check if you have a smart meter

Look at your electricity meter. A smart meter has a digital display showing real-time consumption in kWh, often with multiple screens you can scroll through by pressing a button. Traditional meters have an analogue dial with rotating wheels, or an older digital display showing only a single accumulated reading. If in doubt, call your grid operator — they can confirm instantly.

What if you don’t have one yet?

You’re entitled to one. Under the revised StromVG (Art. 17a^bis), participants in a ZEV or LEG community have the legal right to a smart meter installation within 3 months of requesting it from their grid operator. The installation is at the operator’s cost — not yours. You contact your grid operator, reference your intention to join a LEG or vZEV, and they are legally obligated to respond within that timeframe.

The question in the decision tool above — “is your building’s meter infrastructure already smart?” — is just a timing question, not a barrier. If you answered “no” or “not sure”, request the meter first, then proceed with setting up your ZEV or joining your LEG community.

Frequently asked questions

Can I set up a ZEV as a renter?

Generally no. The ZEV is established by whoever owns or manages the electricity installation in the building — typically the property owner or the Stockwerkeigentümergemeinschaft (StWEG). As a renter, you can participate in an existing ZEV if your building has one, but you cannot unilaterally create one. The LEG is different: you can join as a consumer without any action from your landlord.

What’s the difference between ZEV and vZEV in practice?

The main practical difference is meter infrastructure. Traditional ZEV required physical sub-meters to be installed in each participating unit — expensive, disruptive and time-consuming. The vZEV achieves the same metering digitally using smart meter data and a virtual allocation algorithm. From a participant’s perspective, the experience is similar. From a setup perspective, vZEV is far simpler for building owners to implement.

My building doesn’t have smart meters yet. Can I still do anything?

Yes. If you’re a renter or consumer, join a LEG community — no smart meter required. If you’re a building owner wanting to set up a vZEV, contact your grid operator and request smart meter installation. Under Swiss law they are obligated to provide it. The rollout target is 80% of households by end of 2027, so the infrastructure is coming regardless — you can simply ask to be scheduled sooner.

Is the LEG only for renters?

No. Apartment owners (Stockwerkeigentümer), building owners and even solar producers can all participate in LEG communities. What makes it particularly valuable for renters is that it’s the only model where a tenant can access solar savings without any cooperation from their landlord or building owner. Read the full guide for renters →