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The investment reduced by grants results in the remaining investment. The residual investment is the capital, which the client must raise. Loans reduce the investment.
Here, you can enter absolute investment** or specific investment in €/m² collector surface.
The subsidies can be entered as an absolute grant (e.g. in Germany: BAFA, KfW), a specific grant per m² of collector surface or as a prorated grant for the total investment.