Alectrona
Commercial solar by areaBarnsley and the Dearne Valley sit on exactly the former-colliery industrial stock that commercial solar suits. We are Yorkshire-based and quick to site, designing systems over 50 kWp for the warehouse and manufacturing roofs across the S70 to S75 districts.
These are representative example reviews, not yet-collected customer feedback. They are written to illustrate the kind of feedback Alectrona aims to earn and are shown as design placeholders while we gather and verify reviews from our first commercial clients. Alectrona is the commercial solar trading brand of RVTC LTD.
What set Alectrona apart was the documented design pack. We had quotes from three installers, but only Alectrona handed us a full set of drawings, a single-line diagram and a design referencing BS 7671 and the G99 connection process. The whole thing read like an engineering submission rather than a sales brochure. Our M&E consultant reviewed it and signed it off without a single query. That gave the board the confidence to release the capital.
Other firms priced our roof off a satellite image and a desktop guess. Alectrona flew an in-house drone survey, fully insured and flown by a qualified commercial drone pilot, and built a 3D model of the actual roof. It picked up plant, vents and a parapet line that a flat aerial photo had completely missed, which changed the panel layout. I would rather find that out at design stage than on the day the scaffold goes up. The accuracy of that survey is the reason I trusted everything that followed.
As a finance director I was wary of being oversold a system bigger than we could use. Alectrona modelled the array against our actual half-hourly consumption data rather than an annual total, so it is sized to what we genuinely draw on site during the day. They were honest that exporting surplus is worth far less than self-consumption, and built the design around that. The capital case stacked up because the engineering was honest, not because the numbers were inflated.
We were undecided between buying outright, leasing and a PPA. Alectrona laid out all three side by side with the pros and cons of each against our balance sheet, instead of pushing the one that pays them best. They were clear about where a PPA makes sense and where capex wins, and pointed us at our own accountant for the tax treatment. The survey and design took a little longer than I expected, but the thoroughness was worth the wait. Genuinely consultative.
The install crew were tidy and well run, and worked to a clear CDM 2015 plan with a proper site induction and RAMS. What impressed me most was the handover. We received a full commissioning pack with the IEC 62446-1 test results, certification, O&M documentation and an as-built record for our maintenance team. As the people who have to live with this asset for the next twenty years, having that paperwork in order matters enormously. Nothing was left loose.
I expected the usual hard sell and got the opposite. After surveying our site Alectrona told us one roof section was not worth covering because of shading, and that a smaller, well-sited array was the better investment than filling every square metre. There was no commission-driven upselling and no pressure. For a six-figure capital project, that straight talk is exactly what you want from the people advising you. We will be using them again on our second site.
Alectrona is the commercial arm of RVTC LTD. We design and deliver rooftop and ground-mount solar over 50 kWp for businesses across the S70 to S75 districts and the wider Dearne Valley, on the former colliery sites and industrial estates this page is about. We are Yorkshire-based and reach Barnsley sites quickly, though we make no claim of a completed install in the town yet.
A system this size is an engineering exercise rather than a product off a shelf. At 50 kWp and above the array has to be matched to how the building actually draws power through the day, the roof structure has to carry the load, and the connection has to satisfy the network operator. That is why every Barnsley enquiry starts with an on-site drone survey and a model of the array against your real half-hourly consumption, before anyone discusses a single panel.
Barnsley's commercial roof stock was shaped by what came after the pits. The Dearne Valley enterprise zones sit on former colliery land, and across Carlton, Hoyland Common and the redeveloped distribution sites you find exactly the roofs solar suits best: large, low-pitch and flat post-war industrial sheds, plus the newer steel-portal logistics units rising on cleared ground along Barugh Green Road. Wentworth Industrial Park and Carlton Industrial Estate carry a dense mix of manufacturing and trade occupiers, and the M1 corridor at junctions 36 to 38 has pulled in retail and warehousing around Tankersley.
These load shapes are why on-site generation pays here. A distribution shed or a light-manufacturing unit runs its biggest electrical demand in daylight, when racking, refrigeration, compressed air and machinery are all live, which is the same window the array produces most. The closer that match, the more generation you consume on site at the price you would otherwise pay to import, rather than exporting it cheaply. The SME cluster around Elsecar Heritage Centre and the smaller trade units across S71 and S73 sit at the lower end of the range, where a well-sized roof array takes a real slice off a daytime bill.
None of the firms occupying these estates are our clients, and we make no claim to local installs. We are describing the building stock and the load profiles Barnsley is built on, which is the ground our design work stands on, not a track record we have not yet earned in the town.
Every Barnsley project begins with our in-house drone pilot flying a 3D survey of the roof. The pilot holds an A2 CofC and GVC and is fully insured, and the flight captures pitch, orientation, shading and obstructions accurately enough to build the array in PV*SOL and model it against your half-hourly load. The whole system is designed to BS 7671.
The same kit and the same method that we take across Yorkshire reach a Barnsley site without a long trip, so the drone survey is straightforward to book in. What the pilot records on the day is what the design is built from.
The distribution network operator for Barnsley is Northern Powergrid, and any system over 50 kWp connects under a G99 application to them. G99 is the engineering approval that lets a generator of this size run in parallel with the grid, and it governs how much you are permitted to export. We prepare and manage that application as part of the project, and where a site's export headroom is limited we design in a controlled export limit so the system stays compliant without throttling self-consumption.
We do not publish a blanket grid-constraint claim for Barnsley, because there is no named constrained primary here and we will not invent one. The honest position is that headroom is assessed site by site against Northern Powergrid's local network, and that assessment is part of the survey rather than an afterthought.
Plenty of commercial roofs across Barnsley already carry panels, including FiT-era arrays now well over a decade old and systems left behind by installers who have since folded. Through Solar Tech Support we take on independent operation and maintenance of existing commercial arrays, whatever brand of panel or inverter is up there, and a fault on a Barnsley roof is a routine call-out we reach quickly from our Yorkshire base.
That covers performance monitoring, inverter and isolator faults, string testing and bringing a neglected or underperforming system back to where it should be. We will not quote a fixed response-time SLA before we have seen the site and agreed scope. What we will do is give you an honest read on whether an older array is worth maintaining, and what it is realistically still producing.
For a commercial rooftop system the local planning authority is Barnsley Metropolitan Borough Council, and most roof-mounted arrays on existing commercial buildings fall under permitted development rather than a full application. That is the usual route, but it is not automatic. Permitted development rights are narrowed close to the conservation areas in the town centre and around Elsecar, on listed buildings, and where panels would project beyond the plane of a roof slope, so the planning position is something we confirm for your specific building rather than assume across the borough.
Ground-mount on a former colliery or brownfield plot is a different conversation again, more likely to need a full application and to raise questions about ground conditions on reclaimed land. We treat the planning and permitted-development check as part of the early design work, alongside the structural and grid assessment, so a scheme is not designed around an array the building cannot lawfully carry. Where a full application is the right route we set that expectation at the survey stage. You can see how the survey, design and connection stages fit together on our commercial process pages, and the larger industrial roofs around the Dearne Valley are covered under warehousing and logistics.
Barnsley carries a sizeable public and institutional building stock that sits apart from the industrial sheds, and the roofs behave differently. Barnsley Hospital and the NHS estate, Barnsley College, the leisure centres and the council's own operational buildings around the town centre all run high, steady daytime demand from lighting, ventilation, IT and catering, the load shape where on-site generation is consumed where it is made rather than exported. Barnsley MBC has set out its own net-zero commitments, which puts solar firmly on the agenda for publicly owned roofs, though the procurement route for those bodies runs through frameworks rather than a direct enquiry.
The point for a private business reading this is that the institutional roofs describe the kind of steady-baseload occupier the town holds, not a list of our clients. We have not installed in Barnsley, public sector or otherwise, and we make no claim to. What the public estate does show is that the local case for daytime self-consumption is well understood here. For a school, care home, depot or office building weighing the same decision, our public-sector solar pages set out how we model the array against a half-hourly load and handle the G99 connection, and an older roof already carrying panels can be assessed for takeover rather than replacement.
How the team engineers rooftop solar for a football stadium, matching a large venue roof to an event-driven match-day load. A representative example of the team’s stadium work.
Read the case studyA representative large flat-roof distribution-centre array designed to a daytime logistics load, using half-hourly modelling, an in-house drone survey and an export-limited G99 design to maximise self-consumption.
Read the case studyLast updated June 2026
We cover it, and we are honest that we have not yet completed an install in Barnsley. We are Yorkshire-based engineers working across the S70 to S75 districts and the wider Dearne Valley, including Cudworth, Hoyland, Wombwell and Tankersley, and we reach sites here quickly. Every enquiry starts with an on-site drone survey and a system modelled against your own half-hourly load, not a local job count we do not have.
We focus on systems over 50 kWp, which sits outside the domestic MCS scheme and is assured through commercial engineering standards instead. That suits the larger industrial and warehouse roofs across the Dearne Valley enterprise zones and the M1 corridor estates, where daytime electrical demand is high.
The network operator for Barnsley is Northern Powergrid, and a system over 50 kWp connects under a G99 application that we prepare and manage. There is no town-wide constraint we would claim here; available export headroom is assessed for each specific site, and where it is limited we design in a controlled export limit.
Yes. Through Solar Tech Support we provide independent operation and maintenance and take over older or FiT-era commercial arrays across Barnsley, regardless of the original installer or equipment brand. We agree scope after seeing the site rather than quoting a fixed SLA up front.
We do not publish a price or a from-figure for Barnsley, because a system over 50 kWp is sized to your building rather than sold off a rate card. The cost follows the array size, the roof structure, the inverter and any export-limitation or battery, and that size comes out of the drone survey and the PV*SOL model run against your real half-hourly demand, not a per-square-metre or per-mile figure. The drone survey reaches a Barnsley site from our Yorkshire base without a travel charge. Once we have flown the roof and modelled the load, you get a single costed design with the generation and self-consumption figures behind it, so the number is grounded in your meter.
Quickly. We are Yorkshire-based, so the drone survey reaches a Barnsley site without a long trip, and we can usually get it booked in within days of an enquiry. The longer part of the programme is the grid connection, not the travel. A system over 50 kWp needs a G99 application to Northern Powergrid, and their assessment timescale, rather than how far we drive, sets the critical path on most projects. We submit and manage that application early so the connection runs in parallel with the design and procurement, and we give you an honest programme for your specific site once the survey and the connection position are known.
Wherever you are in the region, the on-site drone survey comes to you and the PV*SOL model sets the figure. Send us the site and the half-hourly load, and we will come back with a designed system.
