Alectrona
Commercial solar panels · over 50 kWp · outside MCSJA Solar 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.
A long-established, top-tier crystalline-silicon maker. PV-Tech historically classified JA Solar as a member of the Silicon Module Super League (SMSL), the analyst grouping of the world’s largest module manufacturers (2015–2019). For current trust it is a BloombergNEF Tier 1 manufacturer (Q1 2026), holds a PV ModuleTech AAA bankability rating, and is a 2026 Kiwa PVEL Top Performer. We confirm the live quarter for the exact module before contract.
JA Solar earns its place on a commercial roof as the bankable value module in our line-up, the one we reach for on larger, simpler arrays where the win is cost per watt across a big plane of uninterrupted roof. It is a BloombergNEF Tier 1 manufacturer for Q1 2026, the financing-track-record benchmark a lender or funder looks for on a scheme above 50 kWp; we re-verify that live quarter for the exact module before contract, because the list is quarterly and latest-only. Tier 1 speaks to financeability, so we read it alongside the maker's PV ModuleTech AAA bankability rating, which sits in the top band with LONGi and Trina, and its 2026 Kiwa PVEL Top Performer result for measured reliability.
Where JA Solar fits is a question the survey answers. On a warehouse or distribution roof with generous, regular bays and a structure that carries the load, the 610W bifacial module spreads a strong commercial yield over fewer fixings and less mounting per watt. On a constrained roof, where every square metre or a tight kWp target is the limit, the premium back-contact module we lead with usually earns the space instead. We size the array against your half-hourly consumption in PV*SOL and let the roof geometry and your electricity use decide, set out in our guide to bankable, Tier 1 panels.
The JA Solar module we specify uses N-type TOPCon cells in a double-glass bifacial laminate. TOPCon matters on a commercial roof for two reasons the datasheet bears out: lower light-induced degradation, so less of the first-year output is lost, and a stronger temperature coefficient than the older PERC cell, which holds power better on a warm summer roof where a flat commercial array runs hot. The double-glass build adds rear-side gain on reflective roof surfaces, so a light-coloured membrane or pale concrete can return useful extra yield behind the panels rather than wasting it.
The flagship 72-cell module is rated at 610W and 23.1% module efficiency, in a 1134 by 2333mm format wired with multi-busbar cells to a 1500V maximum system voltage. That large format is deliberate: on a big, simple roof it covers more area per panel and per connection, which keeps the mounting and the labour down. This is the module for arrays with room to spread; on tightly shaded or fragmented planes, a higher-efficiency back-contact panel makes better use of scarce space. Where the choice between cell technologies affects your yield, we set out the trade-offs in our TOPCon, HJT and PERC comparison, and confirm the exact SKU against the datasheet after the survey.
Warranty is confirmed from the datasheet for the exact module before contract, never assumed. The 610W TOPCon module we specify carries a 12-year product warranty on workmanship and a 30-year performance warranty on linear output, both taken from the JA Solar datasheet; terms move by series and production year, and by the distributor supplying the UK stock, so we read the figures back to you in writing in the proposal. The reliability evidence sits alongside the warranty: a 2026 Kiwa PVEL Top Performer result, an independent test scorecard, and the PV ModuleTech AAA bankability grade, cited beside the BloombergNEF Tier 1 listing rather than in place of it. The corporate backing behind that warranty is a long-established maker founded in 2005, Shenzhen-listed (SZSE: 002459), shipping into 165-plus countries.
A system above 50 kWp sits outside MCS, which is a domestic scheme, so assurance comes from the engineering stack instead. We design and test to BS 7671 and IEC 62446-1, lodge the G99 connection application with the DNO, run the works under CDM 2015 duties, and confirm the array against a structural survey before any module is fixed. RVTC LTD holds the contract; how this replaces an MCS badge is set out in our quality without MCS guide.
JAM72D-40-610-LB-TS-MC4
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.