Should the solar energy be produced over one’s own need, the rest is bought by a power company, if an appropriate agreement has been signed. The excess electricity can be sold to any power company. It should be noted that the power company only pays for the electricity; not for the taxes or transfers, that is, it pays for about 30 % of the overall costs of the electricity procurement. With the current purchase prices, the production of excess electricity is not currently profitable, so it is important to dimension the system to suit the needs of the property.
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