The challenge
Turbines age and incur higher maintenance costs, owners are considering options of how to improve reliability and increase production.
Repower your future
Improve reliability and make the most of your Feed-In Tariff by repowering to a larger wind turbine. Ofgem has confirmed you can swap for a more efficient turbine without affecting your FIT accreditation, and Earthmill handles the whole process.
Your site still has decades of energy left in it
Our solution
Ofgem has confirmed that turbine owners can now swap for larger, more efficient turbines without affecting their FIT accreditation. Earthmill will guide you through the process from feasibility, to supply and install.
Why repower your turbine?
Six strong reasons to act before your turbine's performance declines further.
1. Increased production
larger swept area means greater production so you can get the most from the remainder of your Feed-In Tariff.
2. No grid upgrades necessary
We can tailor turbines with a greater swept area to match your current turbine’s output, greater production without extending your grid capacity.
3. Short payback period
With payback achievable in as little as two years, you’ll be in the green well ahead of the expiry of your FIT.
4. Escape a problematic turbine
Repowering offers the chance to switch to a more reliable model. Earthmill only works with the most trusted suppliers to ensure years of trouble-free generation.
5. Futureproof your investment
Increased generation capability means your turbine can remain a profitable investment beyond the 20-year FIT subsidy period.
6. Simpler Planning
You’ve already set a precedent with your existing turbine, the second time around is often far smoother with some applications getting approved in just 8 weeks.
Repower example returns
The scenarios below are drawn from real Earthmill projects. Generation and revenue figures illustrate the step-change in output you can expect when repowering to a modern, de-rated turbine.
Scenario
Repowered turbine
Metric
Achieved uplift
Scenario 1
E3120 → Vestas V29
→
De-rated Vestas V29
Previously: E3120
⚡ Generation (kWh)
142,000
→
328,000 kWh
+131% increase
→
De-rated Vestas V29
Previously: E3120
£ Annual revenue
£48,000
→
£113,000
+135% increase
Scenario 2
WTN 250 → Vestas V47
→
De-rated Vestas V47
Previously: WTN 250
⚡ Generation (kWh)
451,000
→
1,112,000 kWh
+147% increase
→
De-rated Vestas V47
Previously: WTN 250
£ Annual revenue
£126,000
→
£311,360
+147% increase
Providing the best turbines
Whether you opt for a new or refurbished turbine, Earthmill works directly with turbine manufacturers (including Vestas, Northern Power Systems, and Wind Technik Nord) to supply turbines of the highest quality.
We’ll handle it, from start to finish
A repowering project can feel daunting. The in-house repowering team at Earthmill will guide you through each step to make your project straightforward.
STEP 01
Turbine type
We help you select the right turbine for your site, energy requirements and planning, and produce financial forecasts using specialist modelling software.
STEP 02
Grid & planning
Our in-house grid experts handle all connection alterations. We have strong relationships across all distribution networks and experienced planning partners
STEP 03
Design & installation
Turnkey packages covering all design and installation elements, from foundation design through to commissioning and DNO electrical connection.
STEP 04
Ofgem registration
We manage notification to Ofgem about the change in generation equipment, protecting your FIT accreditation throughout.
STEP 05
Service & maintenance
Your turbine joins our managed fleet. 50+ technicians, 4 UK locations, 24/7 monitoring. Nobody is more effective at keeping your turbine generating.
Signs your site may be ready to repower
Most agricultural turbines are strong candidates from year 12–15 onwards. Use this checklist as a starting point, then get in touch with our team for a free feasibility assessment.
- Your turbine is 12 years old or more
- Annual maintenance costs are rising noticeably
- Your FIT or Renewable Obligation Certificate income is approaching its end date
- Energy output has declined from peak performance years
- Your planning permission is within 10 years of expiry
- You have a fixed-term land lease with a renewal option
- Grid connection capacity at your site exceeds current turbine output
- You want to ensure energy security for the next generation of your business
Book your free repowering assessment
Our specialists will review your turbine’s performance history, site conditions, and financial position and give you an honest picture of your repowering options with no obligation.
We work with turbine owners across England, Scotland, and Wales. Whether you operate a single machine or a portfolio, we can help.
01937 581 011
Mon–Fri 8:00am–5:30pm · 24/7 emergency response for managed fleet
”The level of service provided by Earthmill was second to none. The team in the office kept me up to date every step of the way and the installation was swift and hiccup free. I would certainly recommend Earthmill to anybody who wants a wind turbine.
Chris HobsonYorkshire Farmer
Repowering – your questions answered
What exactly is wind turbine repowering?
What exactly is wind turbine repowering?
Repowering means replacing your existing end-of-life turbine with a larger, more efficient model on the same site. Because your grid connection, access road, and groundworks are already in place, repowering is significantly more cost-effective than a new-build project, while delivering considerably more energy output.
Will repowering affect my FIT accreditation?
Will repowering affect my FIT accreditation?
No. Ofgem has confirmed that turbine owners can swap for larger, more efficient turbines without affecting their FIT accreditation. Earthmill manages the Ofgem registration process on your behalf to ensure continuity of your subsidy income.
Will I need new planning permission?
Will I need new planning permission?
Yes, a new planning application is generally required. However, repowering an established site is considerably more straightforward than a first-time application. Earthmill works with highly experienced planners and has strong relationships across all local authorities.
How quickly could I see a return on investment?
How quickly could I see a return on investment?
Payback can be achieved in as little as two years, depending on your site’s wind resource, the turbine chosen, and your energy tariff arrangements. Earthmill’s specialist modelling software produces detailed financial forecasts specific to your site before you commit to any investment.
Does Earthmill manage the whole process end to end?
Does Earthmill manage the whole process end to end?
Yes. Earthmill provides a fully managed repowering service: turbine selection, feasibility modelling, planning support, grid renegotiation, design, installation, Ofgem registration, and long-term operations and maintenance. With over 15 years’ experience and more than 800 turbines in our managed fleet, we handle everything from start to finish.
Ready to explore repowering?
Talk to a specialist today. Our free feasibility assessment gives you a clear, honest picture of your options with no obligation.
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