Independence calculator

A perfectly coordinated system 

PV modules, electricity storage, and energy management – perfectly in tune and from a single provider. Solarwatt is a German full-systems provider of photovoltaic technology.
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More and more operators of photovoltaic systems are investing in a home battery system. Every second SOLARWATT PV plant is already installed with SOLARWATT Battery vision.

Do you also want to become more self-sufficiency from energy suppliers and electricity price increases? And do something good for the environment at the same time? With SOLARWATT Battery vision you can do both. With our home battery system, you can use much more of the clean solar power you produce yourself - even in the evening and at night.

The following questions will help you to find the optimum power storage size for your application:

  • How self-sufficiency do I want to be from expensive grid electricity?
  • How large is or should my photovoltaic system be?
  • What is the best storage capacity for my home battery system?

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The HTW Berlin independence calculator determines the degree of self-sufficiency and the possible self-consumption share of your photovoltaic system with a home battery system. You can use the tool to find the ideal size of your home battery system to suit your individual needs. Do you still have questions? We will be happy to answer them here.

Overview of the terms used:

Annual electricity consumption:
The annual electricity consumption is your current average electricity requirement per year. Photovoltaic systems are often operated for more than 30 years. Therefore, a possible increase in annual electricity consumption should be planned for. Experience has shown that demand increases significantly following new purchases such as an electric car.

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

Usable storage capacity:
The usable storage capacity is the amount of electricity that the individual battery modules of the Battery flex can store together.

Self-consumption rate:
The self-consumption rate is the amount of solar power consumed from your own roof. With a home battery system, significantly more self-produced solar power can be consumed.

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

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

Grid feed-in:
Solar power that is not used in the household or remains in the home battery system for later use is fed into the public grid. The operator receives a feed-in tariff for this in accordance with the provisions of the Renewable Energy Sources Act.

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