Service & maintenanceWood energy
ÖkoFEN Heiztechnik GmbH
86866 Mickhausen, Bavaria
Biogas · CHP · Wood energy · Digestate
Bioenergy on the farm: find the right providers in Germany
A directory of 202 specialist companies in 15 German federal states and an open profitability calculator for small manure plants. Independent, no enquiry forwarding.
Providers
202
Categories
7
States
15
Manure tariff 7/2026
21,67 ct
Directory
Seven categories around biogas and bioenergy
Biogas plant construction & small manure plants
26Manufacturers and plant builders design and build biogas plants turnkey or by trade: digesters, digestate storage, gas storage, mixing, feeding and control systems.
Planning & engineering firms
19Planning and engineering firms assess the site, feedstock base and economics, prepare permit applications and support tendering, construction and commissioning.
Service & maintenance (incl. CHP service)
77Service companies keep biogas plants and combined heat and power (CHP) units running: CHP maintenance and engine overhauls, mixers and pumps, electrical and control systems, gas analysis and biological process support.
Experts & surveyors
12Experts and inspection bodies assess biogas plants, CHP units and gas installations, check safety requirements and issue certificates, for example as environmental verifiers for EEG billing.
Biomethane & gas upgrading
3Biomethane is raw biogas upgraded to natural gas quality.
Wood energy: wood chips & pellets
49Wood chip and pellet boilers are the second pillar of bioenergy on many farms: wood from the farm's own forest and hedges becomes heat for the farmhouse, barns, drying or a small district heating network.
Digestate & feedstock logistics
51Agricultural contractors haul slurry and digestate, spread it close to the ground, harvest and ensile feedstocks, and run separation or manure exchanges.
Centerpiece
Would a small manure plant pay off on your farm?
Enter your livestock and read off gas yield, power output, rated output and EEG revenue. The calculator checks the 80 per cent manure rule and the 150 kW limit and discloses every assumption.
Go to the calculatorExample: 400 dairy cows, slurry only
| Slurry | approx. 8,000 m³/year |
|---|---|
| Biogas | approx. 200,000 m³/year |
| Power | approx. 395 MWh/year |
| Rated output | approx. 45 kW |
Typical values: 20 m³ slurry per cow and year, 25 m³ biogas per m³ at 55% methane, 36% CHP electrical efficiency.
Most reviewed
All providers
Featured providers
Wood energy
Heizomat
91710 Gunzenhausen, Bavaria
Wood energy
SOLARFOCUS Deutschland GmbH
64653 Lorsch, Hesse
Service & maintenance
2G Energy
48619 Heek, North Rhine-Westphalia
Wood energy
BKS Energy
07426 Königsee, Thuringia
Wood energy
HDG Bavaria GmbH
84323 Massing, Bavaria
Guides
All guides
Know-how for farm plants
Biogas After the EEG: Options for Existing Plants
When a German biogas plant's EEG payment ends: tenders, flexible operation, biomethane, conversion to a small manure plant or closure, as of October 2026.
Biogas Feedstocks: Slurry, Manure, Silage and Residues
Which feedstocks suit a farm biogas plant in Germany? Typical gas yields of slurry, manure and silage, the 80 % manure rule for small plants and pitfalls.
Biogas Heat Use: Livestock, Drying and Local Heat
Making good use of biogas CHP heat in Germany: livestock buildings and farmhouse, drying, local heat networks, heat revenue, supply contracts and funding.
Biogas Plant Costs on the Farm: Investment and Operation
What a farm biogas plant in Germany costs: investment and running cost ranges, the main cost blocks and what drives the price of a small manure plant.
Biogas Plant Maintenance: CHP, Biology, Inspections
Biogas plant maintenance: indicative CHP service intervals, biology monitoring, agitators, safety inspections and full service contracts versus own work.
Biogas Plant Permits in Germany: Building and Emissions Law
Permits for a farm biogas plant in Germany: privileged status under the BauGB, 4th BImSchV thresholds, water law (AwSV), TRAS 120 and the grid connection.
Frequently asked questions
What is a small manure biogas plant?
A farm biogas plant that digests at least 80 per cent manure by mass on annual average and has no more than 150 kW installed capacity at the site. Section 44 of the German Renewable Energy Sources Act (EEG) sets its own tariff: 22 ct/kWh up to 75 kW and 19 ct/kWh up to 150 kW rated output, reduced by 0.5% a year for new plants since July 2024.
Where does the provider data come from?
Listings are based on publicly available business data from Google Places (name, address, phone, website, average rating, as of October 2026). They are not confirmed by the company unless the listing has been claimed. Companies can correct or remove their listing free of charge.
Does bioenergyfarm.eu broker contracts?
No. The directory shows contact details and you contact the company directly. There is no enquiry forwarding and no commission.
How accurate is the biogas calculator?
It gives an order of magnitude based on typical values for manure and gas volumes, CHP efficiency and the EEG tariff. All assumptions are disclosed and adjustable. An investment decision needs a feasibility study and quotes.
For companies
Your company is missing or the details are wrong?
The basic listing is free. With Premium you appear with a linked website, logo and photos at the top of your category and state.