Alectrona
BESS brandFox ESS is a growing energy-storage manufacturer with a three-phase commercial range: the H3 Plus and H3 Pro hybrid inverters and the G-Max all-in-one cabinet, capable and value-strong, specified where it is the right fit for your site.
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.
Fox ESS is a Sino-British manufacturer focused on solar and energy storage, and it has built a commercial range around three-phase hybrid inverters and a pre-integrated battery cabinet. For a finance or facilities director sizing storage against a half-hourly load, the relevant products are the H3 Plus and H3 Pro hybrids, the G-Max all-in-one cabinet, and the CQ7 batteries that pair with the hybrids.
This page sets out where Fox ESS fits and frames its standing honestly. It is a capable, value-strong maker rather than a utility-grade name, so we describe it as what it is and confirm the warranty and the bankability that fit your project before contract. Alectrona is brand-agnostic; we specify the battery that suits the job, the scale and your risk appetite.
Brand-agnostic: the bankable battery that fits the project.
Fox ESS supplies a coherent three-phase line-up that covers a useful band of commercial loads. The system you receive is sized per project from a survey; the figures below are the available range, not a quote.
Fox ESS suits small-to-mid commercial sites where a three-phase hybrid plus modular battery, or a single all-in-one cabinet, matches the load. The H3 Pro and CQ7 combination is well matched to a site that wants solar and storage designed as one and the option to grow the battery later. The G-Max cabinet fits where a self-contained, cabinet-scale unit earns its place: a fast, pre-integrated install behind the meter, sized for peak shaving, load management and lifting solar self-consumption.
The H3 Plus reaches the larger three-phase loads at the top of the commercial range. Whether Fox ESS is right for your building depends on your half-hourly load, your existing inverters and your grid connection, which is exactly the call the survey is there to make. We size the system to the job before we name a brand.
Fox ESS is an established manufacturer with a named product warranty and a real commercial track record, and it is value-strong for what it delivers. We will not dress that up as a utility-grade bankable tier. We do not claim a BNEF Tier 1 ranking or that lenders will finance it on the badge alone, because that is not the basis on which we would put it forward.
What we will do is confirm the warranty term and the bankability that fit your specific project before contract, against the exact model on the current datasheet. Where the deal needs a more lender-familiar name, more established makers are the better fit and we say so. The honest position is that Fox ESS is a capable choice on its merits, verified for your project, not a name we would oversell.
The brand is chosen after the survey, not before it. Our in-house insured drone survey establishes the roof and the constraints, and PV*SOL half-hourly modelling shows how the system would actually behave against your real consumption across the year. Stored solar offsets expensive import, where export is paid far less, so the model is built around lifting self-consumption rather than selling power back. The brand decision follows the numbers.
The assurance on a commercial install is the engineering stack, not a domestic scheme. The work is designed to BS 7671 and commissioned and verified to IEC 62446-1, connected under G99 with your network operator, and delivered under CDM 2015 on a JCT or NEC contract. Fox ESS sits inside that framework, and we specify the battery that fits the project, the scale and your risk appetite, with the current product and warranty confirmed before contract.
The name that matters on a battery is the one that has to stand behind the warranty for the life of the asset, so it is worth being precise about who Fox ESS is. Fox ESS is a Sino-British manufacturer of solar inverters and energy storage that has grown quickly across the residential and small commercial segments, with a UK presence and a product line aimed squarely at the three-phase loads we see on commercial roofs. It is a focused energy maker rather than a diversified industrial group, and that shapes how we weigh it.
Scale is part of the bankability picture because a longer warranty is only worth the maker's ability to honour it years from now. We treat Fox ESS as an established, growing manufacturer with a real installed base and a named warranty, and we read that warranty term and its retained-capacity figure off the current datasheet for the exact model rather than from a brochure headline. The distinction we hold throughout is that Fox ESS earns its place on those merits, not on a tier label. Where a lender or an internal board needs a more established name standing behind the kit, we say so and put a more lender-familiar maker forward instead. The way we frame any brand on this site is set out on the battery costs page, and the warranted life it implies feeds straight into the sizing work.
Fox ESS builds its commercial storage on lithium iron phosphate cells, the same chemistry we lead with across the commercial range. LFP is favoured for behind-the-meter duty because it holds capacity well over many cycles, runs at a stable thermal profile and tolerates the daily charge-and-discharge pattern a peak-shaving or self-consumption store is asked to do. The trade-offs against nickel-based cells are set out on our LFP versus NMC page, and the reason it suits a workplace install is covered under fire safety.
Because a battery is not a PV module, the honest bankability test is certification and warranty, not a Tier 1 ranking. The cells and battery system are designed against IEC 62619, the safety standard for secondary lithium cells and batteries in industrial applications, while the energy-storage system as a whole sits under the IEC 62933 series for safety and grid integration. Manufacturers also commonly test to UL 9540A, the cell-to-system thermal-runaway propagation test that fire authorities and insurers look for. We confirm which of these the specific Fox ESS model holds, on the current datasheet, before it goes into a design, because that certification is the substance behind the warranty and is what the fire strategy and insurer expectations are built on.
The cleanest way to deploy Fox ESS storage is as a matched set: the H3 Pro or H3 Plus three-phase hybrid handles both the solar and the battery in one unit, with the modular CQ7 packs stacked to the capacity the site needs. Designing the array and the store on one platform keeps the architecture tidy and the firmware coherent, which simplifies commissioning and support over the asset life. The G-Max all-in-one cabinet takes that further, arriving as a single factory-integrated unit with its own power conversion, battery management and switchgear, so there is no inverter to match at all.
What makes a battery earn its keep is not the hardware on its own but the dispatch logic that drives it. The energy management decides when to charge from surplus solar, when to hold, and when to discharge against expensive import or a demand-charge peak, and that control sits at the heart of the case for a commercial store. We explain how that layer is specified and tuned on the EMS software page, and the value it chases is the same one set out under peak shaving and solar self-consumption. Where a site already runs inverters from another maker, or wants storage on the AC side independent of the solar, we will say plainly whether a Fox ESS hybrid is the right route or whether an AC-coupled cabinet from another brand fits better, because the architecture follows the site rather than the badge.
Alectrona keeps a deliberate spread of storage brands so the recommendation can follow the project rather than a single supplier relationship. Fox ESS sits in the capable, value-strong band of that line-up. It is the right answer where a small-to-mid commercial site wants a clean three-phase hybrid plus modular battery, or a self-contained cabinet, and where the warranty and certification check out for the specific duty. It is not the name we reach for when a deal is being financed on the strength of the manufacturer behind it, and we do not pretend otherwise.
Above it sits our premium lead for the projects where lender familiarity and the longest possible track record carry the case, and alongside it sit other established makers in the same broad band. The decision between them is made on your numbers after the survey, weighing the warranted life, the certification, the architecture your existing kit allows and your own risk appetite. That whole sequence, from drone survey through PV*SOL modelling to the grid-connection position, is set out under design and engineering, and the connection critical path that gates any commercial battery is covered in the grid connection queue guide. We name the brand only after the data has spoken.
Fox ESS is an established manufacturer with a named product warranty and a value-strong commercial range, but we will not present it as a utility-grade bankable tier. We do not claim a BNEF Tier 1 ranking or that lenders will finance it on the brand alone. We confirm the warranty term and the bankability that fit your specific project before contract, and where the deal needs a more lender-familiar name we say so.
The three-phase H3 Pro and H3 Plus hybrid inverters, which run from roughly 25 kW to 125 kW, the G-Max all-in-one cabinet at around 100 kW and 215 kWh, and the modular CQ7 batteries that stack with the hybrids. The hybrid plus CQ7 suits a site designing solar and storage together; the G-Max cabinet suits a fast, pre-integrated behind-the-meter install. The system you get is sized per project from a survey.
It is Fox ESS's all-in-one commercial cabinet, around 100 kW and 215 kWh, with the cells, power conversion, battery management and switchgear factory-integrated into one outdoor-rated enclosure. It is commissioned as a single product rather than built up from separate parts on site, which suits a cabinet-scale battery doing peak shaving, load management and solar self-consumption.
We will not quote a figure here, because the honest one comes from your load and the exact model on the current datasheet. The Fox ESS commercial range spans roughly 25 to 125 kW across the hybrids and around 100 kW / 215 kWh for the G-Max cabinet, and the CQ7 battery is modular. We size the system from your half-hourly consumption in PV*SOL and confirm the model and warranty before contract.
No. Alectrona is brand-agnostic. We specify the battery that fits the project, the scale and your risk appetite, with the current product and warranty confirmed before contract. Fox ESS is one capable, value-strong option we put forward where the data shows it is the right fit, weighed against the more established names on the engineering and the financeability.
We will not put a figure on this page, because an honest commercial battery price comes from your half-hourly load, the model and capacity the design lands on, and the grid-connection works your site needs, not from a brochure. A Fox ESS system is priced after a survey: we model your real consumption in PV*SOL, size the store on usable energy, and confirm the current model and warranty before contract. How the capital is built up, and why safety engineering and the connection move it, is set out on the battery costs page. RVTC LTD is an independent installer and is not affiliated with Fox ESS.
Lead time depends on two things, and the critical path is usually the grid, not the hardware. Component stock for the H3 hybrids, the CQ7 batteries and the G-Max cabinet varies with the order book, so we confirm availability for the exact model at the point of design rather than promising a date we cannot hold. The longer pole is the connection: a commercial battery above the small-scale threshold connects under an Engineering Recommendation G99 application to your network operator, which for our region is Northern Powergrid, and the time that takes is set by them. We start the G99 process early because a deferred connection delays the day the system earns, and we sequence the install around it. The connection critical path is explained in the grid connection queue guide.
We model your half-hourly load and your solar against a battery sized from an on-site survey, so the figure you get is yours, not a from-price. Capex first, with the bankable brand that fits the project.
