Alectrona
Commercial solar panels · over 50 kWp · outside MCSLONGi commercial solar panels come from a China-headquartered module maker with Silicon Module Super League heritage (2015 to 2019). It is a BloombergNEF Tier 1 manufacturer (Q1 2026); we re-verify the live quarter for the exact module before contract.
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.
The world’s largest monocrystalline-silicon manufacturer and a historical Silicon Module Super League member (PV-Tech, joined mid-2016). It carries the strongest bankability profile of our set: a BloombergNEF Tier 1 listing (Q1 2026) alongside the industry’s longest-standing PV ModuleTech AAA rating, held for 25 consecutive quarters. It is also a 2026 Kiwa PVEL Top Performer for reliability.
LONGi reaches a commercial roof through UK distributors and EPCs, and it is widely specified on UK commercial and utility schemes, so it is a dependable mainstream module for larger, simpler arrays where you want a heavily-stocked, well-supported panel behind a long-life asset. It holds a BloombergNEF Tier 1 listing for Q1 2026, the financing track record a lender or a funder looks for on a larger scheme; we re-verify the live quarter for your exact module before contract. Tier 1 is a financeability signal, so we read it next to independent reliability evidence rather than on its own.
Where LONGi fits a given building is settled by the survey and the PV*SOL model. We size the array against your half-hourly consumption and your roof geometry, then specify LONGi where it suits the structural loading and the funding route. On a larger array the questions that decide the choice are the available roof area, the shading picture from the drone survey and the connection position, and we work the module to those before anything is fixed. If you want the reasoning behind a bankable specification, see our guide to bankable, Tier 1 panels.
LONGi builds its commercial line-up on monocrystalline silicon, with vertical depth running from wafer through cell to finished module. That settled supply chain is part of why the brand stocks deeply through UK distributors, so module availability is rarely the item that paces a commercial programme; the survey, the design sign-off and the G99 grid connection usually do.
We do not lead LONGi with a single flagship SKU here, because the right module follows your roof rather than a catalogue pick. The cell technology, nameplate power, efficiency and temperature behaviour are confirmed from the manufacturer datasheet for the exact module we propose, so the figures you rely on match the panel actually installed. On a commercial roof the questions that decide the specification are the available area, the structural loading and the shading picture from the drone survey; we match the LONGi module to those, then model the array in PV*SOL before anything is fixed. If you want the engineering trade-offs between cell types, our guide on TOPCon, HJT and PERC sets them out. The module is then sized to your geometry and your daytime electricity use rather than to fill every square metre of roof.
We confirm the warranty rather than assume it. We do not publish a headline LONGi warranty figure, because the term is not held in our product registry and the product and performance periods vary by module and production year. Instead we confirm both in writing against the specific datasheet for the module specified, so the cover you rely on matches the panel on your roof. Behind that warranty sits a public manufacturer of real scale, the corporate backing a finance director should weigh on a twenty-five-year-plus asset.
On reliability we cite independent evidence alongside bankability rather than in place of it. LONGi is a 2026 Kiwa PVEL Top Performer for measured field reliability, and holds a PV ModuleTech AAA rating sat beside its Q1 2026 BloombergNEF Tier 1 listing, which we re-verify for the exact module before contract. A system above 50 kWp sits outside the domestic MCS scheme, so we assure it through the engineering stack instead: design to BS 7671, commissioning and testing to IEC 62446-1, a G99 grid connection, a structural survey of the roof, and CDM 2015 duties through the works. Our guide to quality without MCS sets out how that assurance is documented.
MCS does not cover systems this size, so the rigour is what you rely on instead. These are the component-level standards we hold on every install, at commercial scale.
MC4 plug-and-socket connectors are one of the most common failure points in the UK installed base, and the field-made ones are where the risk lives. Every connector we crimp on site gets a sealed ArcBox enclosure: weatherproof, UV-stable, and proof against the arcing-on-corroded-pins failure behind many rooftop PV fires. Diagnosed in real time through our sister company, Solar Tech Support.
A commercial array is a large metal structure on an exposed roof, wired straight into your distribution board. We earth and bond every array to BS 7671 and fit the surge protection that stands between a lightning transient or a grid spike and your inverters and switchgear. It protects the asset and the building it feeds, and it is built into the base design on every install.
Our Qualifying Supervisor, a fully AM2-trained electrician, personally reviews the install report on every job before commissioning sign-off: photos, test certificates, torque-check log and commissioning data, all filed and checked. We are an engineering company first, so the installer never signs themselves off.
Last updated July 2026
Tell us about your building and your electricity use. We will survey the roof, model it in PV*SOL, and specify a bankable module with the scheme, grade and quarter named.