Commercial solar across South Wales
We're a Cardiff-based engineering contractor working across South Wales — from the industrial estates of Newport and Swansea to multi-tenanted offices in Caerphilly and the city itself.
Indicative system size, savings and payback in under a minute. No sign-up.
Local enough to be on site, engineered enough to be worth it
Proximity isn't a nicety on a commercial scheme. It decides how quickly we can survey a site, how well we know the local network position, and what an O&M response actually looks like when something needs attention.
Commercial solar in Cardiff
Cardiff Council
Engineered, installed and connected by a contractor based in the city — not a national rolling a standard design across your roof.
Delivered work in Cardiff
Commercial solar in Newport
Newport City Council
Industrial roofs, real load profiles and the grid position that decides what's worth installing — from a contractor twenty minutes down the M4.
Commercial solar in Swansea
Swansea Council
Delivered in Swansea at Crymlyn Burrows — and engineered the same way everywhere: sized on your load profile, not your roof area.
Delivered work in Swansea
Commercial solar in Caerphilly
Caerphilly County Borough Council
Delivered work on the doorstep — rooftop solar at the Cwrt Rawlin Inn, Britannia House and Creditsafe's UK head office.
Delivered work in Caerphilly
Not on the list? We work across South Wales — including Bridgend, Merthyr Tydfil, the Vale of Glamorgan and Rhondda Cynon Taf, where we delivered a 5 MWp solar farm for the council. Ask about your site.
The infrastructure behind a South Wales scheme
Solar is usually the first question. What actually gets designed depends on how your site draws power, what the incoming supply can take, and what's coming next.
Commercial solar PV
The starting point for most sites. Sized on your half-hourly consumption rather than your roof area, so the generation is used on site instead of exported at a poor rate. Rooftop, ground-mount and canopy — from around 50 kWp to multi-megawatt.
- Structural and electrical design in-house
- PVSyst-grade yield modelling
- G99 application and DNO liaison
Battery storage
Not automatic, and we will tell you when it isn't worth it. Storage earns its place when it shifts load off expensive periods, keeps generation on site instead of exporting it, or holds up a process that cannot take an outage.
- Modelled against your actual tariff
- Peak-period avoidance
- Resilience where an outage has a real cost
EV charging
Fleet, staff and visitor charging designed around dwell time and the capacity you actually have. Almost always arrives after the solar — which is exactly why the headroom is worth designing in at the start.
- Load balancing across bays
- Access control and closed groups
- Integrated with on-site generation
Grid connections, EPC and O&M
The parts that decide whether a scheme happens at all, and whether it still performs in year five. We handle the connection application, act as principal contractor, and maintain the asset against the yield it was funded on.
- G99 / G100 applications and offer negotiation
- Principal contractor on live sites
- Monitoring against the model, not just uptime
You don't have to fund it from capital
Four routes, modelled side by side against your balance sheet rather than pitched. The right one depends on how long you hold the site and what you want on your books — not on what we'd prefer to sell a South Wales business.
Capital purchase
Buy the asset outright and keep every pound of the saving. Best where you hold the site long term and the capital is available.
Asset finance
Own the asset over time on fixed monthly payments, with the saving usually landing from day one. Spreads the cost without giving up ownership.
Power Purchase Agreement
You buy the electricity, not the asset. A third party funds, owns and operates the system — no capital outlay, a unit rate below grid. This is how the Marston's programme was funded.
Energy-as-a-Service
Zero capital expenditure, a fixed rate below grid and savings from day one, with the asset off your balance sheet. Delivered at Crymlyn Burrows.
What would your South Wales roof actually do?
System size, generation, savings and payback — modelled on your address in about a minute. No sign-up.
From operators we work with.
“With the support of Nuvolt's expert team, we are moving forward with on-site generation, increasing our renewable energy production. This partnership is a testament to the synergy between our two organisations.”
Most people come to us for solar. Then we look at the whole site.
Solar is usually the first question, and it's rarely the whole answer. Before we size an array we look at what the site actually does — how it draws power, what the incoming supply can take, and what's coming in the next few years. That's what decides whether solar is worth 200 kWp or 800 kWp, and whether it should arrive on its own.
What your half-hourly data really says
Consumption data shows when you actually draw power, not when you assume you do. A site that runs hard overnight gets a different answer from one that peaks at midday — and that changes array size, export exposure and whether storage earns its place.
Whether your supply can take it
Available capacity at the incoming supply decides what can be connected without a reinforcement bill. It's the single most common reason a solar scheme gets re-scoped late, and the cheapest thing in the world to check early.
Storage, where it pays
Battery storage is not automatic. It earns its place when it shifts load off expensive periods, firms up resilience on a site that can't take an outage, or keeps generation on site instead of exporting it cheaply.
EV, before it's urgent
Fleet and staff charging almost always arrives after the solar. Designing the capacity headroom in now costs very little; retrofitting it into a site that's already at its limit costs a great deal.
One party accountable
We design, install, connect and maintain. When generation, storage, charging and the grid connection all sit with one contractor, nobody gets to point at somebody else when a commissioning date slips.
Funded, if you'd rather not spend capital
Capital purchase, PPA, asset finance or Energy-as-a-Service. The right structure depends on your balance sheet and how long you hold the site — not on what we'd prefer to sell.
Delivered across South Wales
Delivered without disruption. Operating. Measurably saving.
Areas we cover around South Wales
We work across South Wales from our base at Summers House, Pascal Close, St Mellons, Cardiff. If you're not on this list, ask — it isn't exhaustive.
Commercial solar in South Wales, answered
Let's have a strategic conversation about your energy position.
An assessment, a benchmark, a roadmap — whichever is most useful. A short conversation with engineers who run commercial energy every day, not a sales call.