What Immersa Ltd does

Immersa Ltd is a UK-based private technical partner and authorised distributor for AlphaESS battery energy storage systems (BESS), serving solar installers, EPC contractors, and renewable businesses across the commercial and industrial segments. Founded in 2016 and headquartered in Dursley, the company operates a service-led, channel-partner business model — working behind the scenes with installers rather than competing for end customers — providing engineering design, G99/DNO grid compliance, battery sizing and financial modelling, product supply from UK stock, installation and commissioning support, and ongoing asset management. Its product portfolio spans the AlphaESS G3 series (G3-H30, G3-H50), the modular Stax-M50, containerised TB125/TB250 systems, and the utility-scale Aster 500 and Aster 5000 platforms, covering installations from 30kW to 5MW+.

The company generates revenue across five streams: battery hardware sales, engineering and technical services (G99 applications, DNO coordination, single-line diagrams), battery sizing and financial modelling for investment cases, subscription-based asset management and monitoring, and referral fees from connecting partners with funding providers and aggregators. Its primary customer segments are UK solar installers and EPC contractors requiring outsourced battery expertise, PPA and funding providers, battery aggregators, and end-sites ranging from agricultural enterprises and manufacturing facilities (ABB) to infrastructure projects (Network Rail Cambridge South Station). Since establishing its partnership with AlphaESS UK in 2020, Immersa has delivered over 50MW of complex C&I BESS solutions, with cumulative deployment exceeding 20,000 kW of capacity and 39,800+ kWh of energy storage.

In 2026, Immersa expanded its offering through a strategic integration with Capture Energy, layering ML-driven tariff optimization, solar self-consumption maximisation, and flexibility market participation onto AlphaESS hardware via API, without requiring additional on-site hardware. The company positions itself as the "service-led" technical partner of choice in the UK commercial storage market, emphasizing end-to-end support from feasibility through to long-term asset management rather than competing on hardware price.

Name

Immersa Ltd

Legal name

Immersa Ltd

Website

https://immersa.co.uk

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Short description

Immersa Ltd is a UK-based technical partner and authorised AlphaESS distributor supplying battery energy storage systems and engineering services to solar installers and EPC contractors across the UK commercial and industrial market, with cumulative deployments exceeding 50MW of C&I BESS capacity.

Ownership category

akta.pro rank

Product category

Commercial Battery Energy Storage Systems

akta.pro primary industry

Solar Balance-of-Plant EPC (Piles/Foundations, Trenching, Combiner Networks) (EUAEADAJ)

Keywords

• Battery energy storage
• Commercial solar storage
• Energy storage services
• Battery system integration
• Renewable energy partnership

Headquarters

HQ city

Dursley

HQ country

United Kingdom

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Battery Hardware Sales: Sale of AlphaESS battery storage systems including commercial (G3-H30, G3-H50, Stax-M50, TB125, TB250) and utility-scale (Aster 500, Aster 5000) products, plus associated components (mounting, switchgears, meters).
2. Engineering & Technical Services: System design, G99 grid compliance documentation, DNO applications, single-line diagrams, and technical integration support.
3. Battery Sizing & Financial Modelling: Analysis of energy usage, system sizing analysis, financial appraisals, and business case development for investment decisions.
4. Asset Management & Monitoring: Ongoing system monitoring, performance reporting, optimization of charging/discharging strategies, maintenance, and warranty management.
5. Funding & Revenue Network Facilitation: Connecting partners with investors, aggregators, and funding providers for commercial battery projects; introduction fees or partnership arrangements.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

Immersa Ltd operates as a UK-based technical partner to solar installers, EPC contractors, and renewable businesses, supplying AlphaESS battery energy storage systems (commercial and utility-scale) and providing end-to-end support across battery sizing and financial modelling, engineering design and G99/DNO compliance, product procurement, installation and commissioning, and ongoing asset management and monitoring. The company's service-led model works behind the scenes to enable partners to deliver standalone battery storage, co-located solar-plus-storage, and hybrid renewable systems for commercial and industrial customers.

Product overview

Immersa Ltd operates as a UK-based technical partner for solar installers and EPC contractors, supplying a curated portfolio of AlphaESS battery energy storage systems complemented by a full-service engineering, procurement, and asset management offering. The product portfolio spans two tiers: Small Commercial & Industrial products (AlphaESS G3-H50 50kW/120.5kWh, G3-H30 72.3kWh, Stax-M50 144.6kWh) and Large Commercial & Industrial products (TB125 125kW/261kWh containerised, TB250 940kWh containerised, Aster 500 500kW/1.2-1.4MWh, Aster 5000 5MW+ utility-scale). Immersa positions itself as an extension of installer delivery teams rather than a direct competitor, offering services including battery sizing and financial modelling, engineering and system integration (G99/DNO coordination), product supply from UK stock, installation and commissioning support, and ongoing consultancy and asset management. The AlphaESS technology partnership, established since 2020, provides Bloomberg Tier 1 battery systems with Alpha Cloud monitoring across 100+ countries.

Differentiator

Problem solved

Functional benefit

Products and services

• AlphaESS G3-H50 Commercial Battery Storage System AlphaESS commercial battery storage system with 50kW power output and 120.5kWh energy capacity, featuring standard off-grid operating mode for standalone applications without additional specialist equipment, and supporting DC-coupled solar integration. For UK commercial customers and partner installers delivering small C&I projects.
• AlphaESS G3-H30 Commercial Battery Storage System AlphaESS commercial battery storage system with approximately 72.3kWh capacity designed for solar and wind integration on commercial and agricultural sites. Targets UK commercial customers and installer partners delivering hybrid renewable storage projects.
• AlphaESS Stax-M50 Modular Commercial Battery Platform Next-generation modular commercial battery platform with 144.6kWh capacity (50kW inverter) featuring 200% DC-coupling capability allowing up to 100kWp DC input. Designed for flexible, scalable installations with advanced solar integration for UK commercial customers and installer partners.
• AlphaESS TB125 Containerised Battery System Containerised commercial battery system with 125kW power output and 261kWh energy capacity, designed for larger commercial installations with market participation capabilities. Supplied to UK installer partners and end customers requiring integrated tariff and flexibility market revenue.
• AlphaESS TB250 Containerised BESS High-capacity containerised battery energy storage system with 940kWh capacity for large-scale solar and storage installations, featuring advanced DC-coupling capability for efficient solar integration. Supplied to UK installer partners for agricultural and industrial C&I sites.
• Aster 500 Large-Scale C&I Battery Storage System Large-scale commercial battery storage system with 500kW power output and 1,175.5–1,410.7kWh energy capacity, featuring liquid cooling, IP54 rating, G99/G100 grid compliance, and scalable architecture supporting up to 6 units in parallel. Targets UK developers, landowners, and large C&I sites needing grid-scale storage.
• Aster 5000 Utility-Scale Battery Storage System Utility-scale battery storage system with 5MW+ power output designed for multi-megawatt grid applications, developer projects, and large landowners requiring utility-grade storage solutions in the UK.
• Engineering & System Integration Service Technical support service covering system layout, electrical design, G99/G100 grid compliance, DNO applications, solar integration, and software/monitoring platforms. Delivered to UK solar installers and EPC contractors delivering commercial battery storage projects.
• Battery Sizing & Business Case Analysis Energy assessment service analysing baseload demand, solar/wind generation, technical conditions, and energy costs to determine optimal system sizing with financial forecasting for investment decisions. Provided to UK installer partners and end customers building the business case for commercial battery investments.
• Installation & Commissioning Services Installation support covering site preparation, electrical/mechanical installation, grid testing, certification, training, and system handover. Delivered to UK installer and EPC partners delivering commercial battery projects.
• Consultancy & Asset Management Long-term monitoring, optimisation, and support service including performance reporting, trading strategy optimisation, maintenance, fault response, warranty management, and grid flexibility market advice. Delivered as a recurring engagement to UK commercial battery operators and investor partners.
• Funding & Revenue Networks Connection service linking UK installers and developers with funding partners and aggregators, supporting fully funded systems, PPAs, leasing options, and shared savings models for commercial battery projects. Operates on referral/introduction economics.
• Product Supply & Procurement Tier 1 AlphaESS battery storage systems and supporting equipment procurement service including backup equipment, meters, switchgears, mounting kit, and screw foundations, supplied from UK stock for rapid deployment to installer and EPC partners.

Quantifiable outcome

• 20,000+ kW of battery deployed across partner installations
• +6 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability3 records

Feature5 records

Partnerships

Eight partnerships are on record, tiered core.

• Capture EnergycoreTechnology or Integration · 24 June 2026Strategic integration partnership announced June 2026. Capture Energy's optimization platform integrates with AlphaESS via API (no additional hardware required) to enable dynamic tariff optimization, solar self-consumption maximization, and participation in flexibility markets. Immersa has chosen to work alongside Capture Energy to provide investors and installers with proven route to maximizing battery performance.
• AlphaESS UKcoreTechnology or Integration · 1 January 2020Since 2020, Immersa has partnered with AlphaESS UK as an authorised partner to deliver advanced battery storage solutions across the UK. Together they've delivered over 50MW of complex C&I BESS solutions. AlphaESS is a Bloomberg Tier 1 manufacturer with 200,000+ operational systems across 100+ countries.
• Oakes EnergycoreChannel Partner/ Reseller/ DistributorInstaller partner for multiple projects including Five Acre Community Garden CIC (off-grid solution) and ABB manufacturer project (900kWp solar + 553kWh BESS).
• BavenhillcoreChannel Partner/ Reseller/ DistributorLong-standing installer partner featured in multiple case studies including Lower Heath Farm (636kWp + 940kWh), Webbs Garden Centre (916kWp + 810kWh), and Leadenporch Farm (550kWp + 388kWh).
• Natural Generation LtdcoreChannel Partner/ Reseller/ DistributorInstaller partner for multiple projects including Hill Farm (solar + wind + battery), Chynoweth Farm (one of UK's first Stax-M50 installations), and other commercial battery projects.
• Styne RenewablescoreChannel Partner/ Reseller/ DistributorInstaller partner for Ford Farms project (295kWp solar + 443kWh BESS) achieving 81% grid import reduction vs 45% with solar only.
• Current RenewablescoreChannel Partner/ Reseller/ DistributorInstaller partner for Moat Farm new-build commercial site project (70kWp + 120.5kWh G3-H50) designed within 50kW grid constraint.
• Murphy GroupcoreChannel Partner/ Reseller/ DistributorInfrastructure developer partner for Cambridge South Station Network Rail project. Immersa delivered full BESS design, supply, and installation within major infrastructure environment.

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Sungrow: Global manufacturer of solar inverters and battery storage systems with a strong UK distribution footprint. Comparable as a Tier-1 BESS hardware supplier that competes for the same installer channel relationships Immersa leverages.
• Centrica Business Solutions: UK energy services arm of Centrica delivering onsite generation, battery storage, and energy management to commercial customers. Comparable to Immersa as a UK-focused BESS solutions provider serving C&I end customers, though at materially larger scale.
• Wartsila Energy Storage: Global utility-scale battery storage provider combining hardware with GridSolv software and lifecycle services. Comparable as a BESS integrator competing for the same utility and large C&I project pipeline that Immersa serves via the Aster 5000.
• EDF Renewables UK: Major UK renewable energy developer and operator with battery storage projects and flexibility-market participation. Comparable as a broad incumbent with overlapping UK BESS development, engineering, and asset-management capabilities.
• BYD Energy Storage: Global battery and BESS manufacturer with utility-scale and C&I product lines deployed in the UK. Comparable to AlphaESS (Immersa's primary supplier) as a competing Tier-1 BESS manufacturer that could attract Immersa's installer partners.
• Tesla Energy: Global energy storage manufacturer and integrator (Megapack, Powerpack) with growing UK and European presence. Comparable as a vertically integrated BESS competitor, though operating at significantly larger scale than Immersa.

Direct peers

• Arenko: UK battery storage optimiser and flexibility-market trader with a focus on C&I and utility-scale assets. Comparable to Immersa as a UK-focused BESS technical and commercial services provider bridging hardware, software, and grid-market revenues.
• Fluence: Global battery energy storage system integrator and software provider with active UK operations. Comparable to Immersa as a BESS solutions provider combining hardware supply with grid-services software (Fluence Mosaic) and lifecycle services.
• Habitat Energy: UK-based battery optimisation and trading company operating across flexibility markets. Directly comparable because both operate in the UK C&I battery storage space, work closely with installers/developers, and combine technical integration with market participation services (analogous to Immersa's Capture Energy integration).

Emerging players

• Chevin Technology: UK-based technical partner and distributor for commercial battery storage and solar PV. Comparable to Immersa as a small-scale UK technical partner bridging installers/EPCs with battery hardware suppliers, engineering design, and project support services.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/immersa-ltd

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Immersa Ltd