Grid connection for energy generation plants

Everything you need to know about the grid connection of your photovoltaic system

Anyone who opts for a photovoltaic system (PVS) on their own roof also needs to know how the connection to the grid works. We have put together all the key steps for you here – for systems with and without grid constructions. You will also find further important information here.

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Frequently Asked Questions

I supply the electricity from my photovoltaic system to AVAG using the direct feed-in model. Can I now switch to self-consumption?

Yes, you can. Please contact your installer.

How can I optimise the yield of my PVS?

Check whether our optional tariff Primeo SolarAktiv is worthwhile for you.
If you make greater use of the production peaks around midday to cover your own consumption and your photovoltaic system has a production focus in winter, you can increase the yield of your PV system by up to 30 per cent. You can find more information about Primeo SolarAktiv here.

Optimise your own consumption.
The electricity you produce yourself is cheaper than electricity from the grid. With self-consumption, only your production costs are incurred, but no energy and grid utilisation costs or levies that you have to pay when purchasing electricity from the energy supplier. You can find more information on optimising self-consumption here.

Do I have to sell the excess energy from my own electricity generating system to the local grid operator?

No, owners of electricity generation plants can also sell the electricity generated to third parties.

How can I terminate or resume my return delivery of electricity to Primeo Energie/Aare Versorgungs AG (AVAG)?

The return delivery may be terminated with 30 days’ notice to the end of a quarter. Return deliveries to Primeo Energie/Aare Versorgungs AG (AVAG) may be resumed within the same period at the beginning of a quarter and must be notified by email to pva@primeo-energie.ch.

How is the amortisation period for photovoltaic systems calculated?

The amortisation period indicates the point in time when operating your own photovoltaic system starts to pay off. For a typical photovoltaic system with an output of 10 kilowatt-peak (kWp), in other words, around 25 modules, this takes between 10 and 20 years. The amortisation period depends on the interaction of various factors, such as the share of own consumption, the energy supplier’s electricity tariff, any subsidies that may apply, and the return delivery remuneration for the electricity fed into the grid. Incidentally, the amortisation period of a photovoltaic system is often confused with its service life. In most cases, the service life of photovoltaic modules is much longer, around 30 to 40 years.

What happens to my photovoltaic system if the grid fails or the Federal Government switches off the electricity? Can I continue to feed electricity into my battery storage and use it?

If the power supply is interrupted, the photovoltaic system will also be affected. However, this depends on the configuration of the system.

A special inverter is required. The inverter is the centrepiece of a solar power system. A hybrid inverter is required for emergency power operation. This works both with electricity from the grid as well as in case of a power failure.

In addition to the hybrid inverter, a battery storage system is also important for emergency power operation. If the solar power system is unable to produce electricity due to bad weather or too little sun, the energy from the battery storage is used. How long the stored power lasts depends on your electricity consumption.

Important to know: Converting a normal photovoltaic system to emergency power supply mode is not exactly cheap. Additional costs of around CHF 10,000 to 15,000 can be expected.

Anyone who wants a photovoltaic system with an emergency power supply should mention this at the beginning of a consultation. This allows the PV system to be planned and ordered accordingly.

Information about battery storage can also be found here.

Do I have to pay tax on my photovoltaic system’s feed-in remuneration?

In principle yes, you do. You can ask the relevant tax authority directly how the feed-in remuneration for your photovoltaic system is to be taxed. Please refer to your canton’s instructions for completing your tax return.
Primeo Energie/Aare Versorgungs AG (AVAG) will gladly provide you with a tax statement for the energy fed into the grid for your tax return. Register on our myPrimeo customer portal and discover the portal together with a whole range of functions that will make your administrative work easier in future.