Efficiency can be planned

Good planning is the beginning of everything. This includes a sound analysis and requirements planning. Our technical and sales teams specializing in the solar product range will conduct a site and building analysis with you, taking into account the solar orientation of the building as well as the statics and geometric influences. In this way, you receive an energy concept that is precisely tailored to your needs.

And for those who already know exactly what they want, our solar calculator is the first step towards independence. Because our calculator determines the degree of self-sufficiency as well as the possible self-consumption share of your photovoltaic system with an electricity storage system in just a few steps. With the tool, you can find the ideal size of your electricity storage unit to suit your individual needs.

We will be happy to answer any further questions you may have or to provide you with a solar design that is precisely tailored to your needs and requirements. Simply use the contact form!


ZEWO Solar Calculator

The following questions will help determine the optimal power storage size for your application:

  • How independent do I want to become from expensive grid electricity?
  • How big is or should my photovoltaic system be?
  • What storage capacity should my electricity storage have in the best case


Overview of terms used:

Annual power consumption: The annual electricity consumption is your current average electricity demand per year. Photovoltaic systems are often operated for more than 30 years. Therefore, a possible increase in the annual electricity demand should be planned for. As a result of new purchases such as an electric car, experience shows that the demand increases noticeably.

Photovoltaic power: The photovoltaic power corresponds to the maximum solar power that can be generated. The system output is limited by the available roof area.

Self-consumption share: The self-consumption share is the self-consumed solar power from the own roof. With an electricity storage system, significantly more self-produced solar electricity can be consumed.

Degree of self-sufficiency: The degree of self-sufficiency indicates the independence from expensive grid electricity. The value shows what percentage of the annual electricity demand can be covered by own environmentally friendly solar power.

Direct consumption: Direct consumption is the immediate use of the solar electricity currently generated.

Grid feed-in: Solar power that is not used in the household or remains in the power storage unit for later use is fed into the public power grid. For this, the operator receives a feed-in tariff in accordance with the regulations in the Renewable Energy Sources Act.

Grid purchase: The grid purchase indicates how much electricity was used from the public grid.

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