About the Project
Great Harmeston Solar Farm will be located on parcels of land to the south of the village of Johnston in Pembrokeshire. It consists of predominantly medium and large fields which are currently used for agricultural purposes.
The proposed development will export up to 93MWp (DC) into the local electricity network, which equates to powering around 34,444 homes a year with clean, renewable energy. This will make a vital contribution to climate change targets and the country’s transition away from fossil fuels.
Location Plan
Click on the map to enlarge
Timeline
Construction dates are to be provided following grant of planning permission. The project is expected to operate for a period of forty years.
* The exact time cannot be set yet.
Initial Site Surveys
Project Launch, Pre-Application and Local Engagement
Planning Application Submission
Planning Decision Issued
Frequently asked Questions
The site has been chosen based on several factors:
- Good solar exposure
- Very close proximity to a grid connection
- Minimal environmental impact and a well-screened site
- Predominantly lower-grade farmland
Every effort has been made to select a location with least impact and most benefit.
No. Solar panels generate electricity silently. The only operational noise comes from inverters and transformers, which will be enclosed and located well away from homes. During operation, noise is negligible.
There is no consistent evidence that solar farms impact nearby property values. Because they are low-profile, quiet, and clean, their impact on neighbouring properties is minimal, especially with proper landscaping and screening.
We aim to minimise visual impact. A Landscape and Visual Impact Assessment (LVIA) is carried out to identify viewpoints, and we use hedgerows, trees, or fencing where appropriate to screen the site and preserve scenic views.
Only temporarily. During construction (typically 3–6 months), there will be a short-term increase in traffic from construction vehicles. Once complete, the site will have very low traffic, limited to occasional maintenance visits.
Yes, but it’s minimal and low-disruption. Occasional visits are made to inspect equipment, clean panels if needed, and maintain vegetation. There is no 24/7 staffing, and no need for loud machinery.
For forty years. After this period, the site will be fully decommissioned and restored to its previous condition in accordance with the planning permission.
We promote combined land use, including grazing by sheep, wildflower and native grass planting, and biodiversity enhancements such as pollinator habitats. This will ensure that the land remains green and productive while hosting the solar farm.
Solar panels work even on overcast days—just at a reduced output. Solar technology in the UK is designed to perform efficiently in diffuse light, common in Welsh weather. The grid balances power from various sources to ensure consistent supply.
Solar farms often enhance biodiversity by providing habitats for birds, bees, and butterflies, avoiding pesticide use, planting pollinator-friendly vegetation. A suite of ecology surveys is carried out to assess and provide recommendations to support wildlife at the site.
- Community Benefit Fund supports local initiatives
- The landowner receives secure rental income
- Jobs are created during planning, construction and operation
- The project helps Wales meet renewable energy targets and reduces reliance on fossil fuels
- The developer benefits by selling renewable electricity to the grid following its high initial capital investment
We aim to create a Community Benefit Fund, with the potential to support:
- Local schools
- Environmental groups
- Village halls
- Community events
- Green infrastructure
We’re open to suggestions on how best to serve the local area.
Yes. The site will be securely fenced and monitored with discreet CCTV to prevent vandalism or theft. Security infrastructure is designed to blend in with the landscape.
Once the project ends, all equipment is removed, and the site is restored to its original use. This decommissioning process is outlined and secured during the planning process.
