In 2026, WWZ remunerates fed-in solar power according to the quarterly calculated reference market price of the Swiss Federal Office of Energy – with no fixed-price product of its own. On top there is 1.00 Rp./kWh for the guarantee of origin (solar systems up to 100 kW), provided the system is registered in Pronovo's GO system and there is a GO standing order in favour of WWZ. (As of: July 2026)
Key points in brief
- The energy remuneration follows the reference market price harmonised nationwide and averaged quarterly (Art. 15 EnFV) – so it fluctuates from quarter to quarter.
- The statutory minimum remuneration for small systems applies as a floor; unlike other utilities in the region, WWZ does not offer its own fixed-price or contract model.
- The solar guarantee of origin adds a further 1.00 Rp./kWh (systems up to 100 kW; above that 0.50 Rp.) – prerequisite: Pronovo registration plus a GO standing order.
- Energy is generally paid out quarterly; the GO remuneration for small systems annually in May of the following year.
- This makes it all the more important in WWZ's area to maximise self-consumption – it is unaffected by market fluctuations.
How does the WWZ model work?
With the new Electricity Act, WWZ has opted for the leanest variant: it passes the federal reference market price straight through. The Swiss Federal Office of Energy calculates this value for each quarter from the average electricity market prices; it applies uniformly across Switzerland as the base for grid operators without their own tariff model. The «Einspeisung elektrischer Energie (EeE)» tariff applies to stationary systems up to 3 MW – so to every rooftop system in the supply area.
| Component | Rate 2026 |
|---|---|
| Energy | quarterly SFOE reference market price (fluctuating) |
| Solar GO, systems up to 100 kW | 1.00 Rp./kWh excl. VAT (1.08 incl.) |
| Solar GO, systems from 100 kW | 0.50 Rp./kWh excl. VAT |
| Energy floor | statutory minimum remuneration for small systems |
Guideline values according to WWZ tariff sheets «EeE» and «Ecological added value (GO)», valid from 1 January 2026. Tariffs are adjusted periodically – WWZ's current tariff sheets are decisive; the SFOE publishes the current reference market price.
In quarters with high market prices you benefit directly; in sun-rich summer quarters, when all systems feed in at the same time and prices are pushed down, remuneration falls correspondingly lower. The federal statutory minimum remuneration protects against extreme lows.
What does the guarantee of origin bring – and how do you get it?
At WWZ, the ecological added value is remunerated separately and modestly: 1.00 Rp./kWh for solar systems up to 100 kW. The generator capacity (kWp) is decisive; if that is not known, the inverter capacity counts. For the remuneration to flow, two things are needed: registration of the system in Pronovo's GO system and a signed GO standing order transferring the certificates to WWZ's trading account.
Two administrative details worth knowing: GO delivery runs on an annual basis and renews automatically – cancellable at year-end with one month's notice. And for small systems without load-profile metering, payout takes place annually in May of the following year – so anyone feeding in during summer 2026 only sees the GO money in spring 2027. No big deal, but good to know before mistaking it for an error on the statement.
How does WWZ compare regionally?
Put honestly: WWZ sits at the sober end of the scale. ewz politically supports its tariff at a stable average of 12.91 Rp., Stadtwerk Winterthur pays seasonal fixed prices up to 13 Rp. under its contract model, AEW at least offers a fixed price of 8.2 Rp. including GO as an option, and EKZ remunerates the GO with up to 3 Rp. – WWZ passes through the market price and adds 1 Rp. for the GO. You cannot choose your grid operator; the consequence is a different one:
In WWZ's area, the self-consumption rate determines the system's profitability even more than elsewhere. Every kilowatt-hour you consume yourself replaces the full purchase tariff – regardless of what the market currently pays. Shifting consumption into sunshine hours, coupling a heat pump or EV, calculating a battery if your profile fits: that's half the battle in Zug. The other half comes from the investment side – the one-off feed-in incentive, Zug's insulation bonus for combined projects and the tax deduction.
Is a solar system in Zug still worth it?
In most cases, yes – only the reasoning shifts. The calculation is carried not by feed-in but by the avoided electricity purchase plus the incentive for the investment. A system properly sized for self-consumption achieves solid results even in WWZ's area; a pure full-feed-in logic («big roof, everything into the grid»), on the other hand, pays off worse here than, say, in the City of Zurich. This trade-off belongs in the planning stage – not only in the first annual statement.
In the Zug area, we regularly see surprises in both directions: disappointment at the market-price remuneration in the summer quarter – and astonishment at how little that matters in the overall calculation when the system is properly designed for self-consumption. On projects with a heat pump or EV, more than half of production often ends up used in the house itself, and then the avoided purchase tariff carries the calculation almost on its own. Even so, the GO standing order belongs in every commissioning for us – a centime is a centime, and the paperwork takes ten minutes.
Frequently asked questions
Where can I see the current reference market price?
The Swiss Federal Office of Energy publishes the quarterly calculated value on its website (keyword feed-in remuneration/reference market price). WWZ links directly to it in its «EeE» tariff sheet.
Does WWZ offer a fixed price?
No, as of 2026 there is no fixed-price or contract model for the energy – you are remunerated at the reference market price, supplemented by the separate GO remuneration. Check the current tariff sheets in case the product range changes.
Why do I only receive the GO remuneration the following year?
For systems without load-profile metering – so practically all single-family-home systems – WWZ settles the ecological added value annually and pays out in May of the following year. Only systems with load-profile metering (connection capacity above 30 kVA) are remunerated monthly.
Do I have to hand over the GO to WWZ?
No, it is your choice. Without a GO standing order you keep the certificates – but they are then not remunerated. For the typical rooftop system, handing them to WWZ is the simplest way to turn the added value into cash.
Who pays for the metering equipment?
WWZ supplies the necessary meters at the producer's expense under the connection cost regulations; a load-profile meter is required for connection capacities above 30 kVA. For typical single-family-home systems, this item stays within tight limits – it belongs in a transparent quote.
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Sources: WWZ Energie AG (tariff sheets «Einspeisung elektrischer Energie (EeE)» and «Tarif ökologischer Mehrwert (HKN)», valid from 1 January 2026), Swiss Federal Office of Energy (reference market price, Art. 15 EnFV), Pronovo AG.
Last updated: 9 July 2026 · Author: ecoEn editorial team
