From coal mine to solar park
Whiteborough Solar Park
We’ve been working on our Whiteborough solar park project for over 3 years now.
We want to show that ground-mounted solar makes a lot of sense, if it is done right. At Whiteborough we are bringing together several key elements to make a unique solar park that showcases this approach:
Scale. Our solar park will cover approximately 10 acres. It’s not a huge installation that will change the landscape for miles around.
Land use. The land is a former opencast coal mine, which is currently used as pasture for horses. We’re not displacing farming or food.
Recycled solar. 45% of the solar panels are re-used from a decommissioned solar farm – we think this is a UK first.
Ethical sourcing. The remaining solar panels are ethically sourced with a supply chain free of forced labour.
Ethex Cuppa Club
Thursday 3 July 2025, 12:00 – 12:45
Join this online discussion between Ben Sharpe, Senior Investment Manager at Ethex, and Jon Halle. Timed to coincide with the launch of our new bond offer on Ethex, this event is a chance to hear first-hand about the funding up of Whiteborough Solar Park development.
Bond offer now open
We’re raising the funds to build our Whiteborough project through bonds. You can buy bonds from £100 and you can wrap them in an ISA for tax-free income. We’ve partnered with the Ethex investment platform for the bond offer.
Whiteborough: the site
Whiteborough Farm dates back to at least the 1880s. The site is bounded to the south by the Silverhill Trail greenway, formerly the route of the Pleasley railway line which served the many collieries in the area.
Our solar field was the site of coal mining over many years. It was last worked as an opencast mine in the 1950s. The mine was closed and filled in in the 1960s. The land is now Grade 4 (Poor) Agricultural Land and is currently used for grazing horses.
An ecological survey showed that there are no protected species and few species of note at the site.
We aim to increase biodiversity at the site by:
- Establishing new native hedgerows along 3 sides of the site boundary.
- Planting new trees in the hedgerow.
- Enhancing the grassland biodiversity by sowing wildflower seed and managing the site accordingly with a mowing and grazing regime.
- Providing new nesting boxes for farmland birds such as tree sparrows.
- Providing access for mammals such as brown hare.
Recent research from the RSPB and Cambridge University shows that a well managed Solar PV ground mounted system can help to increase the mix of wildlife habitats available. As a result they can have up to 3 times the numbers of birds around them as nearby arable farmland
This holds out hope for the survival of Yellowhammer, Corn Bunting and many others.
Whiteborough: the design
Our solar array is designed to make best use of the available space and the grid connection.
We will build in two phases: an initial 2 MW of new Meyer Burger panels will be followed by a second phase of 1.5 MW of second-life LDK panels.
We’ve optimised the design based on the fact that our grid connection is limited to 2.05 MW export. At times of the highest solar input we will max out that capacity just from the new panels and the second-life panels will not be required. But at all other times (93% of the time) the second-life panels will be enabling us to put extra power down the line, contributing around 35% of the total energy we will generate in a year.
This strategy is known as a high DC:AC ratio and we have selected high-quality inverters that can support this approach, made by SMA in Germany.
There may be opportunities to further optimise our use of the grid connection in future, for example by using batteries.
We’ve not opted to include batteries at this time as they don’t offer a clear financial and carbon benefit right now – that may change in the future and we have access to additional land that could be used for battery co-location.
Projected Timeline
| April 2024 | Project Rights acquired by Big Solar Co-op. Grid connection deposit paid. |
| September 2024 | Aniron appointed as principal installer. |
| April 2025 | Design finalised and key contracts agreed. Solar panel deposit paid. |
| May 2025 | Bridging loan terms agreed. |
| June 2025 | Bond offer commences. Construction begins on site (civil and security works). |
| Summer 2025 | Grid connection and solar installation works continue. |
| September 2025 | Bond offer concludes, first bridging loan repayments made. |
| October 2025 | Solar panel installation complete |
| November 2025 | Project energisation; first generation. |
| January 2026 | Second bond offer completes bridging loan repayment. |
Bond offer now open
We’re raising the funds to build our Whiteborough project through bonds. You can buy bonds from £100 and you can wrap them in an ISA for tax-free income. We’ve partnered with the Ethex investment platform for the bond offer.