The Tywi valley from Llandovery down through Llandeilo to Carmarthen is the most productive agricultural corridor in Carmarthenshire. Soil quality in the valley floor is among the highest-rated arable and improved grassland in Wales. The dairy and beef farms here are financially stronger than equivalent upland hill-farming operations further north in the county — and that financial strength means farm solar decisions in this catchment increasingly proceed on the strength of the commercial case alone, without depending on Farming Connect grant to bridge a viability gap.
The Tywi farm solar profile
Dairy farms in the Tywi valley have energy consumption profiles particularly well matched to solar generation. The morning and afternoon milking parlour cycles create peaks at 06:00 to 08:00 and 15:00 to 17:00. Bulk milk refrigeration runs continuously. Water heating for parlour cleaning runs in the 07:00 to 09:00 window. In aggregate, a Tywi valley dairy farm of 150 to 250 cows consumes between 45,000 and 80,000 kWh annually, much of it in daylight hours.
At 960 kWh/kWp PVGIS yield across the SA19 postcode, a 60 kWp rooftop installation on a Llandeilo-area dairy farm generates 57,600 kWh annually. Self-consumption typically runs at 72 to 80% on a working dairy operation. First-year electricity saving: approximately £13,000 at 27p/kWh blended. Installed cost: approximately £55,000. Post-AIA payback: approximately 2.8 years — well inside the 7 to 10 year threshold most farmers apply as the viability test.
Farming Connect grants in SA19
Farming Connect grant support for farm solar in Carmarthenshire runs through the Welsh Government Rural Payment Wales system with Farming Connect advisors at Llandeilo and Carmarthen offices. The 2026 round opened with a 40% capital grant rate on eligible items for qualifying holdings. For a £55,000 solar installation with eligible costs of £48,000, the grant contribution is approximately £19,200 — reducing net capex to £35,800.
After AIA full-expensing on the remaining private capex and assuming the holding is a farming partnership rather than a limited company, the effective outlay is approximately £26,850. Against a year-one saving of £13,000, post-grant payback falls to approximately 2.1 years.
The Farming Connect application process for solar involves:
- A written feasibility report confirming the installation specification and generation model — which FLD provides as part of a no-obligation survey
- Pre-approval submission to Farming Connect before any works begin
- Procurement against at least two competitive quotes (FLD’s fixed-price proposals satisfy this requirement)
- Post-installation technical report and MCS certification
FLD manages the technical documentation for Farming Connect submissions as part of scope. We do not manage the grant application itself — that is the farmer’s responsibility with their Farming Connect advisor — but we provide all the supporting engineering evidence required.
Dinefwr National Trust estate
The National Trust Dinefwr estate at the western approach to Llandeilo covers Newton House (a Grade I listed seventeenth-century country house), the medieval Dinefwr Castle ruin, and a working farm of approximately 800 acres. The farm operation produces White Park cattle, an ancient Welsh breed, alongside managed grassland and woodland.
National Trust estate solar follows a distinct procurement pathway — the Trust’s own sustainability team manages feasibility assessments using a nationally approved installer framework. Commercial solar at Dinefwr would be a Trust-initiated project rather than a standard FLD commercial survey. However, the tenant farms on the Dinefwr estate periphery, and the farm supply businesses that service the estate, are standard commercial solar clients.
Conservation area in Llandeilo town centre
Llandeilo town centre carries a designated conservation area covering the market square and principal Georgian and Victorian streets. Front-elevation solar panels within the conservation area boundary require a planning application. Rear-slope panels on most town-centre properties proceed under permitted development.
FLD confirms the conservation area position for every Llandeilo domestic survey. For Georgian terraces with south-facing rear pitches, the standard on-roof rail-mounted system at 4 to 6 kWp is the typical specification. For front-elevation proposals where the homeowner wants to make use of the southerly street-facing slope, we advise on in-roof integrated options before proceeding to planning application.
Getting a Llandeilo farm or domestic solar survey
FLD covers SA19 as part of a Tywi-Cennen valley circuit combining with Ammanford and Llandovery. Drive time from Swansea is 48 minutes via the A483 and A40. Call Paul on 01792 680611 for a farm solar feasibility assessment or a domestic survey in Llandeilo.