The verdict in three sentences
For a wind and solar developer that must win over municipalities, landowners, citizens and investors, a B2B specialist agency gives the best balance of credibility, project mapping and three-year cost. A communications agency pulls ahead when your priority is citizen participation and handling local opposition. For a fast, clean entry site before a bigger build, a packaged offer such as Kolonell Premium at EUR 1,200 to 2,300 in 21 to 30 days is a realistic first step.
What the site must do in Germany
German audiences expect transparency. Municipal councils want your track record and participation process. Landowners want lease terms, timelines and a named contact. Citizens increasingly expect a way to invest or benefit locally, since community participation models and municipal revenue sharing for wind and solar parks are now a common part of the conversation. Investors look at pipeline in MW, assets in operation and governance.
So the site needs a bilingual project map (German first, English for investors), participation pages per project with documents and meeting dates, and an investor relations section. Legal basics are non negotiable: a full Impressum, a GDPR privacy notice and a consent banner that blocks tracking until consent, in line with the TTDSG.
| Feature | 2026 cost (EUR excl. VAT) | Note |
|---|---|---|
| Project map, 10 to 60 projects, DE and EN | 3,500 to 12,000 | Filters by technology and status |
| Citizen participation pages | 2,000 to 8,000 | Documents, dates, Q&A |
| Investor relations section | 2,500 to 9,000 | Reports, governance, pipeline |
| Landowner enquiry page | 800 to 2,500 | Qualification by area and municipality |
| Accessibility to BITV and WCAG level | 1,500 to 5,000 | Required for many public partners |
| Annual maintenance | 1,200 to 6,000 | Updates, backups, new projects |
2026 ranking of provider types
This ranking compares categories, never named firms, on stable criteria: three-year cost, timeline, reversibility and proximity for workshops.
| Rank | Provider type | Budget (EUR) | Timeline | Reversibility | Best for |
|---|---|---|---|---|---|
| 1 | B2B specialist agency | 25,000 to 50,000 | 10 to 14 weeks | Good | Developer with 10 to 60 projects, raising capital |
| 2 | Communications agency | 28,000 to 60,000 | 12 to 18 weeks | Medium | Contested projects, heavy participation |
| 3 | IT consultancy with web practice | 35,000 to 60,000 | 14 to 18 weeks | Good if documented | Live generation data, GIS integration |
| 4 | Senior freelancer | 15,000 to 25,000 | 10 to 14 weeks | Low without docs | Small team, under 10 projects |
| 5 | Packaged offer (e.g. Kolonell Premium) | 1,200 to 2,300 | 21 to 30 days | Good | Entry site, early stage developer |
How to read it. B2B agencies win because they build a proof based story (MW delivered, assets operating) without drifting into vague green claims, which matters as EU rules on environmental claims tighten. Communications agencies cost more but bring stakeholder and press handling. IT consultancies only earn their place if the map must show live generation data from your SCADA or monitoring tools.
Three-year total cost
| Provider type | Build (midpoint) | Maintenance, 3 years | Changes (new projects, documents) | 3-year total |
|---|---|---|---|---|
| B2B specialist agency | 37,500 | 12,000 | 8,000 | 57,500 |
| Communications agency | 44,000 | 13,500 | 9,500 | 67,000 |
| IT consultancy | 47,500 | 15,000 | 12,000 | 74,500 |
| Senior freelancer | 20,000 | 6,000 | 5,500 | 31,500 |
| Packaged offer | 1,750 | 2,750 | 2,500 | 7,000 |
2026 estimates. Packaged maintenance assumes EUR 76 a month over 36 months.
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Mini case study
Illustrative example: Jonas, managing director of a 40-person wind and solar developer in Berlin with 28 projects across Brandenburg and Saxony-Anhalt, hires a B2B agency for EUR 41,000: bilingual project map, 10 participation pages, investor relations and a BITV accessibility pass. He budgets EUR 4,000 a year for maintenance.
The maths: three-year cost is EUR 53,000. If the site brings 5 qualified landowner enquiries a quarter and one a year turns into a 10 MW project, a single secured site is worth far more than the website budget in development value.
FAQ
How much does a bilingual project map cost?
EUR 3,500 to 12,000 depending on project count and filters. Connecting live generation or GIS data adds EUR 6,000 to 18,000.
Do we need citizen participation pages?
For wind parks and large ground mounted solar, yes in practice: budget EUR 2,000 to 8,000. They reduce rumours by publishing documents and dates.
What legal pages are mandatory in Germany?
An Impressum, a GDPR privacy notice and a compliant consent banner. Getting them right adds roughly EUR 500 to 1,500 to the project, far less than a warning letter.
What timeline should we expect?
Ten to 18 weeks depending on the provider, or 21 to 30 days for a packaged entry site. Collecting project visuals often adds 1 to 2 weeks.
Let's scope your project. Tell us your project count and priority audiences, and we will price an entry site or a full build with a timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
