Slovenia: Borzen — biogas received EUR 8.1 million in support for 53.5 GWh, about EUR 151/MWh

The Slovenian operator Borzen published on 27 October 2025 its report on the operation of the support scheme for electricity from renewable sources and high-efficiency cogeneration for the period from January to September 2025. Over that time biogas produced 53.51 GWh and received support of EUR 8.10 million, which gives an average of about EUR 151/MWh. Production from biogas was 8.6% higher than a year earlier.

The scheme in numbers

As of 30 September 2025 the scheme included 3103 power plants with a total capacity of 485.51 MWe. The scheme is a state aid instrument: through increased purchase prices it enables investment in renewables and cogeneration, in line with the act on the promotion of renewable energy sources and the decree on support for electricity from renewables and high-efficiency cogeneration.

Production rose by 81.6%, and support by 15.6%. The largest contribution to the growth came from fossil-fuel combined heat and power plants, whose production more than quadrupled (from 70.72 to 319.94 GWh). Hydro increased production from 2.33 to 40.18 GWh, while solar fell slightly from 202.06 to 196.87 GWh.

Biogas and wood biomass

Biogas accounted for 8.1% of production in the scheme and 10.2% of support payments (8.10 of EUR 79.36 million). Average support per MWh, calculated from these data (EUR 8.10 million / 53.51 GWh), is about EUR 151/MWh and is higher than the average for the whole scheme (EUR 120.36/MWh). Biogas plants and wood biomass power plants recorded moderate production growth: 8.6% and 17.6% respectively.

For comparison, photovoltaics, which had 29.9% of production, received 60.8% of support (EUR 48.28 million). This means that unit support for solar panels in this scheme is higher than for biogas.

What this means for biogas plants

For Slovenian biogas plants the report shows moderate production growth (8.6% year on year), and the average rate (about EUR 151/MWh) is higher than the average for the whole scheme. Converted, EUR 151/MWh is about PLN 640/MWh at a rate of about PLN 4.25 per euro (indicative, 2025).