ZEV Switzerland 2026:
Self-Consumption Group
Explained
What is a ZEV, what does it cost, who can join — and when is an LEG the better option? The complete guide for building owners, landlords and tenants. With interactive savings calculator and decision tool.
Looking for a full comparison of all three models? → ZEV vs. LEG vs. vZEV — complete comparison →
The Zusammenschluss zum Eigenverbrauch — ZEV, or self-consumption group — has been the established way to share solar electricity within a building since 2018. Since 2026, two new models have arrived: the vZEV (since 2025) and the LEG.
This article answers those questions — honestly and with real numbers.
What is a ZEV? A clear definition
A Zusammenschluss zum Eigenverbrauch (ZEV — self-consumption group) is a legal arrangement in which multiple consumption units within a building or property jointly operate a solar system and distribute its electricity internally.
The key features:
Who can form a ZEV?
ZEV is not for everyone. The requirements are clearly defined:
| Requirement | Detail |
|---|---|
| PV system present or planned | No ZEV without solar — self-consumption requires own production |
| Multiple units on one connection | At least 2 consumption units in the same building or contiguous property |
| Same grid connection | All ZEV members behind a shared house connection |
| Owner consent | For co-ownership (STWEG): decision by the owners' meeting required |
| Sub-meter per unit | Each residential unit needs its own sub-meter (recommended: smart meter) |
How does ZEV billing work?
System: 12 kWp. Annual yield: ~11,400 kWh. Building consumption: ~18,000 kWh/year. Self-consumption rate: ~55%. Each of the 6 apartments pays 19 Rp./kWh for their solar share instead of 27.7 Rp. — saving CHF 120–200 per year. The owner earns significantly more than with pure feed-in.
What does a ZEV cost? Setup and ROI
A Swiss ZEV (“self-consumption group”, Zusammenschluss zum Eigenverbrauch) means budgeting up-front setup—typically smart sub-meters, any electrical work, optional planning support, and PV if the building still needs a system—and ongoing costs, mainly internal billing (your time) or a billing provider so owners and tenants in an apartment building are settled correctly. The ranges below use 2026 Swiss benchmarks for typical ZEV projects; use them to sketch ROI, then confirm with quotes for your municipality.
One-time costs
| Item | Typical cost in Switzerland |
|---|---|
| Sub-meter per unit (smart meter) | CHF 200–500 per unit |
| Electrician / cabling (if needed) | CHF 500–2,000 (building-dependent) |
| Consultation / design | CHF 500–1,500 (one-off) |
| PV system (if not yet installed) | CHF 1,200–1,700/kWp (incl. installation, Swissolar 2026) |
Ongoing costs
| Item | Cost per year |
|---|---|
| Billing admin (self-managed) | 10–20 hours |
| Billing service provider (e.g. Upgrid) | CHF 200–600/year (building-dependent) |
| PV system maintenance | CHF 100–300/year |
ZEV, vZEV or LEG — which, when?
Honest framing: a ZEV is a good choice in one clearly defined situation. In others, there are better options.
"If your system produces more than your building consumes — or if you have neighbours in the municipality who want cheaper electricity — LEG is the stronger option."
ZEV vs LEG: side-by-side
The tool above walks through the trade-off in questions; the table below spells it out as criteria you can scan. What became broadly workable from January 2026 under LEG matters most when surplus electricity no longer stays inside the building.
| Criterion | ZEV | LEG |
|---|---|---|
| Who can participate | Residents of your building only | Any household or business in your municipality |
| What you earn per kWh | ~19 Rp. (internal tariff) | ~15 Rp. — but on a much larger buyer pool |
| What happens to surplus | Feed-in at ~8.5 Rp./kWh | Sold locally at ~15 Rp./kWh (55% absorbed) |
| PV system required | Yes — you must own one | Yes — but consumers can join without panels |
| Owner agreement needed | Yes — all co-owners must vote yes | No — individual units join independently |
| Grid discount for members | No — internal only, no grid fee saving | Yes — 20–40% grid fee reduction for consumers |
| Works across multiple buildings | No (vZEV does, with conditions) | Yes — entire municipality |
| Setup complexity | Medium — sub-meters, owner vote, billing | Low with Upgrid — one sign-off, we handle the rest |
The key difference in plain language: a ZEV is limited to your building's demand. If your system produces 10,000 kWh and your building only absorbs 4,000 kWh internally, the remaining 6,000 kWh goes to feed-in at ~8.5 Rp. In an LEG, those same 6,000 kWh reach neighbours who need them — at ~15 Rp.
The two models also aren't mutually exclusive. An existing ZEV can join an LEG and contribute its surplus to the wider community, giving you the best of both: internal efficiency plus neighbourhood reach.
Choose ZEV if: your building has multiple units, PV already installed or planned, and owners are on board. Clean, simple, works today.
Choose LEG if:your system produces more than your building absorbs, you want to maximise income on surplus, or owners won't all agree on a ZEV. Upgrid handles the full setup.
Do both if: you have a working ZEV and want to sell surplus beyond your building. The two stack.
ZEV for tenants
As a tenant, your position is different from an owner's. The key points:
Frequently asked questions about ZEV
Next steps
Interested in a ZEV — or want to know whether LEG is a better fit? Upgrid advises and operates both.
ZEV vs. LEG vs. vZEV — complete comparison of all three models →
ZEV, LEG or both —
we help you decide.
Upgrid advises and operates both models.