A self-consumption community (ZEV) is set up in six steps: check suitability and production capacity, choose the model (physical or virtual), define the metering concept, draw up the ZEV agreement with the residents, notify the grid operator of the community – and organise billing. The legal framework is well established; the metering concept and the agreement require the most care, because that is where conflicts arise later. (As of: July 2026)
Key points in brief
- A ZEV bundles producers and consumers behind one grid connection – towards the utility it acts as a single customer.
- The prerequisite is a solar system with significant production capacity at the place of consumption.
- Setting it up is not a bureaucratic marathon: the core is the metering concept, the agreement and the notification to the grid operator.
- The agreement governs price, distribution and exit – before the system runs, not afterwards.
- If you want to avoid converting the metering, check the virtual ZEV as an alternative first.
What exactly am I setting up – and is it worth it?
A ZEV turns a building with many electricity customers into a single one: the residents draw solar power directly from their own roof, and only the community as a whole has a contract with the utility. That is the economic core – solar power distributed internally does not touch the public grid and incurs no grid fees. How the money flows in detail is shown in the article on ZEV surplus remuneration.
Before you set one up, one question needs answering: is the ZEV the right model at all? Since 2025/2026, the virtual ZEV and the local electricity community (LEG) are two alternatives that may fit better depending on the situation – the big model comparison makes this preliminary decision for you. In short: the classic ZEV plays to its strengths when a new build or electrical renovation is due anyway and a clean in-house metering concept is possible.
Legally, a ZEV requires a system with significant production capacity relative to the connected load of the community – in practice, a solar system seriously sized in relation to the building meets this. Whether your planned system size is sufficient is part of project planning and can be answered clearly before setting it up.
The six steps to setting it up
Step 1: Check suitability. Are all future participants behind the same grid connection? The classic ZEV ends at this boundary – if you want to go beyond it, you end up with the LEG. Add to this the production-capacity question from above and a sober estimate of profitability: how much of the production can the residents consume internally?
Step 2: Choose the model. A physical ZEV with its own metering – or a virtual ZEV using the grid operator's smart meters, without conversion? This decision sets the effort for everything that follows. The criteria are in the model comparison; the virtual variant is explained in detail in the vZEV article.
Step 3: Define the metering concept. A physical ZEV meters internally itself: private meters (submetering) record who draws how much solar and grid power. Cutting corners here means paying twice later – without clean metering there is no fair billing. Who measures what and how the levels interact is shown in the article Metering, meters & monitoring.
Step 4: Draw up the agreement. The most important document of the set-up. It governs the internal electricity price including the price formula, the distribution of surplus remuneration, participants joining and leaving, and responsibilities. For rental properties, tenants must also be informed; in condominium ownership, the community must pass a resolution. The guardrail for pricing is set by law: solar power must not cost residents more than the external standard product – details in the article on surplus remuneration.
Step 5: Notify the grid operator. The ZEV is reported to the local utility; the grid operator's apartment meters disappear, leaving the shared metering point. From now on, the ZEV is one customer for the utility – which often also means a cheaper supply tariff, because the bundled consumption may fall into a different tariff category.
Step 6: Organise billing. Billing yourself, via the property management or through a service provider – the three options, including a rule of thumb for when a service provider pays off, are covered in the article ZEV in apartment buildings.
| Step | Key question | Most common mistake |
|---|---|---|
| 1 Suitability | one connection point? significant production? | model question skipped |
| 2 Model | physical or virtual? | metering conversion underestimated |
| 3 Metering concept | who measures what? | planned too late |
| 4 Agreement | price, distribution, exit | only drawn up after commissioning |
| 5 Notification | grid operator informed? | deadlines/meter conversion not coordinated |
| 6 Billing | who bills how? | non-transparent annual bill |
For guidance, as of: July 2026. The law, the ordinance and the requirements of the local grid operator are authoritative.
Which mistakes cost the most later on?
Not the technology – the organisation. We see three patterns again and again:
The agreement submitted after the fact. The system is running, the power is flowing, and only then is it negotiated who pays what. From this moment on you are negotiating from a weaker position – every rule now looks like a disadvantage for someone. The agreement belongs signed in the file before the first solar power is distributed.
The metering concept that was skimped on. Flat-rate allocation keys instead of real metering work exactly as long as nobody does the maths. By the first change of tenant or the first discussion about service charges at the latest, you need reliable figures per party.
The forgotten exit rule. Residents move, owners sell. If the agreement does not govern how someone leaves the ZEV and what happens to the meter and billing, every change becomes a case-by-case dispute.
All three mistakes have the same root: the ZEV is treated as a technical project, when it is half an organisational project. The specialist company delivers the technology – the owners must want and understand the rules.
The most successful ZEV set-up we support is unspectacular: the owners clarify the model question and the agreement while we plan the system – both run in parallel and are finished on the day of commissioning. The most tedious variant is the reverse order: build first, then organise. For apartment buildings in the Zurich region, we now routinely advise submitting the vZEV enquiry to the grid operator right at the start of the project – the answer decides whether the metering conversion is worthwhile at all, and it costs nothing but a letter.
Frequently asked questions
Do I need a permit to set up a ZEV?
No, the ZEV is a private-law association – it requires no official permit, just notification to the grid operator and clean internal contracts. The solar system itself goes through its usual notification or permit procedure, independently of the ZEV.
Do all residents have to take part in the ZEV?
In principle, the owners decide on the model; tenants are protected by rules – above all the price cap, under which internal solar power must not be more expensive than the external standard product. The terms for joining and leaving belong in the ZEV agreement.
How long does it take to set up a ZEV?
The organisational part – agreement, notification, meter concept – can be done in parallel with system planning and then barely extends the project. It only becomes a bottleneck if it starts after commissioning. Realistically, set-up and construction run in the same weeks.
Can I extend an existing ZEV later?
Yes – for example with additional parties at the same connection point or with shared consumers such as a heat pump and charging points. Selling the surplus into an LEG later is also possible. What matters is that the metering concept and agreement allow for extensions instead of having to be renegotiated for every addition.
ZEV or rather vZEV?
The honest answer: first ask the local utility for the vZEV conditions, then decide. Without an upcoming renovation, the virtual route is often the quicker entry; for a new build or renovation, the classic ZEV with its own metering concept has more going for it.
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From the suitability check and metering concept to notifying the grid operator: for apartment building projects, organising the ZEV is part of our quote – with figures instead of theory.
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Sources: Energy Act (EnG) and Energy Ordinance (EnV) on self-consumption communities, ElCom FAQ on the energy strategy following the Mantelerlass (as of 2026), publications of the regional grid operators.
Last updated: 9 July 2026 · Author: ecoEn editorial team
