Business Wales Flexible Investment Fund
Low-interest loans £10k-£2m via Development Bank of Wales.
Location guide · Wales · Updated 12 May 2026
Solar panel grants for businesses in Cardiff
Cardiff-based businesses access a particular stack of regional schemes alongside the UK-wide tax reliefs and export tariffs. This page maps the local landscape — Cardiff One Planet Strategy, Cardiff Council's net zero commitments by 2030, and the regional growth hub funding for SMEs across the Wales region.
Cardiff commercial energy context
Cardiff is home to around 372,089 residents, with a diverse commercial base across the sectors that define the regional economy. A typical SME of 50-250 employees in Cardiff spends approximately £38,000 per year on electricity — making solar PV one of the most material capital projects available for protecting operating margins against energy price volatility.
Welsh Government Net Zero by 2030 for public sector creates strong demand. Welsh Business Wales scheme provides SME grants.
Postcodes served
We support eligibility checks for businesses across all Cardiff postcodes including: CF1, CF3, CF5, CF10, CF11, CF14, CF15, CF23, CF24.
Key industrial & business areas in Cardiff
Commercial solar projects in Cardiff are concentrated around these industrial and business areas where rooftop area is largest and grid connection capacity strongest:
- Cardiff Bay Business Park
- Wentloog Industrial Estate
- Capital Business Park
- Hadfield Road
- Pengam Green
Neighbouring areas also served
Our advisory covers businesses across the wider Cardiff commercial region, including: Penarth, Caerphilly, Barry, Newport, Pontypridd, and the broader Wales corridor.
Regional schemes for Cardiff businesses
Alongside the UK-wide tax reliefs and SEG income, businesses in Cardiff can access these region-specific schemes:
Welsh Government Energy Service
Free advice and project support for Welsh public bodies and SMEs.
Sustainable Production Grant for Welsh farms
Match-funded grants for on-farm renewables.
UK-wide schemes that apply in Cardiff
Most Cardiff commercial solar projects stack the regional schemes above with these UK-wide reliefs:
- 100% Full Expensing — limited companies deduct 100% of solar capex from corporation tax in year one. Uncapped. 25p saved per £1 spent at the 25% main rate.
- Annual Investment Allowance — sole traders, partnerships and limited companies deduct 100% of plant and machinery up to £1m per year. 19-25% saving for Ltd; up to 45% for higher-rate sole traders.
- Smart Export Guarantee — Ofgem-licensed suppliers pay 3p-15p per kWh exported. Typical annual revenue £900-£3,500 on a 100kWp commercial system.
- PSDS — 100% capital grants for public sector buildings in Cardiff including schools, NHS, council and university estate.
- IETF — 30-50% match-funded grants for energy-intensive manufacturing in Cardiff.
Cardiff sector focus
The strongest 2026 commercial solar opportunities in Cardiff are across these sectors — see the dedicated sector guides for full eligibility and grant stacks:
- Factories & manufacturers in Cardiff's industrial corridors
- Warehouses & logistics on the big-box estate
- Offices & professional services in the Cardiff central business district
- Hotels & hospitality across Cardiff's visitor accommodation
- Retail & food service on Cardiff high streets and out-of-town parks
- Schools in the Cardiff maintained estate
- Healthcare & NHS across the Cardiff acute and primary care estate
Free eligibility check · Cardiff
Tell us your business — we map every active 2026 grant to your sector, size and postcode.
FAQs
Solar grants in Cardiff · FAQs
What grants are available for solar panels in Cardiff businesses in 2026?
Cardiff-based SMEs typically access a stack of: 100% Full Expensing or AIA tax relief; Smart Export Guarantee export tariffs; and regional schemes specific to the Wales region — most prominently Business Wales Flexible Investment Fund. Eligibility varies by sector, size and exact postcode.
Does my Cardiff business qualify for regional solar grants?
Most Wales growth hub and combined authority schemes require: (a) trading address inside the geographic boundary, (b) SME status (under 250 employees, under £43m turnover), (c) commercial premises with material energy spend. Use the eligibility calculator for a personalised answer.
How much does commercial solar cost for a typical Cardiff business?
Typical commercial solar capex in Cardiff for a 100kWp rooftop system is £80,000-£105,000 (2026 prices). After 100% Full Expensing for a limited company at the 25% main CT rate, net cost is around £60,000-£79,000. Annual electricity savings of £18,000-£28,000 deliver typical post-tax payback of 3-5 years.
Are there Cardiff-specific planning issues for commercial solar?
Cardiff planning falls under Cardiff Council. Welsh Government Net Zero by 2030 for public sector creates strong demand. Welsh Business Wales scheme provides SME grants. Listed buildings and conservation area properties require Listed Building Consent and conservation area consent respectively.
Can a Cardiff business stack multiple solar grants?
Yes — most successful 2026 commercial solar projects in Cardiff stack at least 3 schemes. Typical stack: tax relief (Full Expensing or AIA) + SEG export tariff + a regional capital grant. We map the stack to your specific business in the free eligibility check.
What is Cardiff's net zero target?
Cardiff Council targets net zero by 2030. The published framework is Cardiff One Planet Strategy. Welsh Government Net Zero by 2030 for public sector creates strong demand. Welsh Business Wales scheme provides SME grants.
Find out what Cardiff solar grants your business qualifies for
Free 60-second eligibility check tells you which UK and Wales schemes apply to your specific Cardiff business — and how to stack them.
Start eligibility check Or call 0800 246 1132