Wattstor
Wattstor is a UK-based energy technology company that finances, designs, and operates AI-optimized DC-coupled battery storage and on-site renewable systems for commercial and industrial customers across Europe, primarily through long-term Power Purchase Agreements.
- Company typePrivate
- Founded2013
- HeadquartersLondon, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Wattstor does
Wattstor is a UK-based energy technology company that finances, designs, and operates on-site renewable energy systems for commercial and industrial (C&I) customers across Europe. The company's integrated offering combines DC-coupled Battery Energy Storage Systems (BESS) with its proprietary Podium Energy Management System (Podium EMS), an AI-driven cloud platform that uses machine learning to forecast day-ahead wholesale electricity prices, solar generation, site load, and battery state-of-charge, then automates charge/discharge and trading decisions. A key technical differentiator is the DC-coupled architecture, which bypasses grid connection limits to enable up to 8x more solar capacity than conventional AC-coupled systems.
Wattstor monetises primarily through Fully Funded Energy Systems structured as 15–25 year Power Purchase Agreements (PPAs), under which the company finances, installs, and maintains on-site solar PV and battery storage with zero upfront capital expenditure for the customer; customers purchase electricity at sub-grid rates and gradually gain asset ownership over the PPA term. A secondary revenue stream comes from wholesale electricity market trading, enabled by Wattstor's Virtual Trading Party (VTP) accreditation under the UK P415 framework, where Podium captures arbitrage upside delivered to customers through smart-fixed contracts with partner suppliers such as Bryt Energy. The Price Protect tariff combines variable-rate flexibility with a fixed price ceiling, providing cost certainty while preserving market optimization.
The company's go-to-market is sales-led and consultative, targeting C&I enterprises across pharmaceutical distribution (Mawdsleys), transport infrastructure (National Highways), manufacturing (LSN Diffusion), hospitality, biogas/energy (Icknield Gas), and public-sector utilities (HEP in Croatia). Customers span at least five countries with a pipeline extending to seven more. Backed by private equity firm Ara Partners and a £50 million debt facility from Aldermore Bank (January 2026), Wattstor is headquartered in London with subsidiaries in Munich, Berlin, and Brno.
Wattstor firmographics
Firmographics- Name
- Wattstor
- Legal name
- Wattstor Ltd
- Website
- https://wattstor.com
- Company type
- Private
- Founded year
- 2013
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Wattstor is a UK-based energy technology company that finances, designs, and operates AI-optimized DC-coupled battery storage and on-site renewable systems for commercial and industrial customers across Europe, primarily through long-term Power Purchase Agreements.
- Ownership category
- akta.pro rank
Wattstor industry classification
Industry- Product category
- Commercial and Industrial Energy Management
- NAICS
- Solar Electric Power Generation (221114), Electric Power Generation (22111)
- SIC
- Electric Services (4911), Finance Lessors (6172)
- akta.pro primary industry
- C&I Onsite/Behind-the-Meter Energy Supply (Solar, CHP, Microgrids) (EUAGACAJ)
- akta.pro secondary industries
- Solar Financing, Leasing & Ownership Platforms (Tax Equity, PPA, Securitization) (EUAMABAJ), Renewable Energy Asset Management (Solar/Wind/Hydro/Geothermal) (EUAEAMAB)
Keywords
Where Wattstor is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices4 records
Markets served
Wattstor business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Supply Chain, Technology or R&D, Operations, Personnel, Marketing or Sales, Infrastructure
Revenue model
- Fully Funded Energy Systems (PPA): Wattstor finances, designs, installs, and operates on-site renewable energy systems (solar PV, BESS) for C&I customers at zero upfront capital cost. Revenue is generated through Power Purchase Agreements (PPAs) where Wattstor supplies renewable electricity at a lower cost than grid rates. Over the PPA term (typically 15-25 years), the customer gradually gains ownership of the assets as costs reduce. Wattstor maintains all assets, warranties, and handles ongoing energy automation through Podium.
- Debt and Equity Financing for Project Portfolio: Wattstor raises project finance (debt facilities and equity) to fund the deployment of its Price Protect project portfolio. The £50m debt facility from Aldermore Bank, complemented by equity from Ara Partners, is used to finance on-site renewable energy projects. Returns are generated through the ongoing PPA revenue streams once projects are operational.
- Wholesale Energy Trading: Through its VTP (Virtual Trading Party) accreditation under the UK P415 market framework, Wattstor participates directly in the wholesale electricity market. The Podium EMS automates trading against day-ahead market pricing, charging batteries when prices are low and discharging or selling when prices are high. Wattstor partners with energy suppliers (e.g., Bryt Energy) to offer smart-fixed contracts that shield customers from market risk while capturing trading upside.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Fully Funded Energy System (PPA) |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels7 records
Wattstor product offering
Product offeringCore offering
Wattstor finances, designs, installs and operates on-site renewable energy systems (solar PV and Battery Energy Storage Systems) for commercial and industrial customers, typically via 15–25 year fully funded Power Purchase Agreements with zero upfront capital expenditure. The AI-driven Podium Energy Management System optimises when to use, store, or trade electricity, complemented by the Price Protect capped-variable tariff and DC-coupled architecture that decouples solar capacity from grid connection limits. The offering is delivered primarily through long-term electricity supply agreements bundled with hardware, software and ongoing operations.
Product overview
Wattstor offers an integrated hardware and software ecosystem for commercial and industrial energy management. The core offering combines Podium (AI-driven EMS), Battery Energy Storage Systems (BESS), and the Price Protect renewable tariff into a unified platform. Key hardware includes DC Coupled Solutions that overcome grid constraints, the Wattstor ECD edge controller device, and lithium-ion battery storage. The company provides both direct purchase and Fully Funded Energy Systems financing options. Podium serves as the central brain, integrating with BESS hardware to optimize energy decisions based on real-time market data, load forecasts, and battery state-of-charge. Price Protect provides the commercial tariff layer, while wholesale trading services enable participation in electricity markets.
Differentiator
Problem solved
Functional benefit
Products and services
- Podium Energy Management System AI-driven cloud-based energy management system (EMS) that automates the optimisation of on-site solar generation, battery storage, site load and electricity trading for commercial and industrial customers, using machine learning to forecast day-ahead market prices, solar generation, site load and battery state-of-charge.
- Price Protect Renewable Energy Tariff Pioneering renewable energy tariff for commercial and industrial sites that combines the flexibility of a variable wholesale rate with the price certainty of a fixed cap, dynamically optimising the wholesale portion of energy costs against day-ahead market pricing while guaranteeing a maximum price ceiling.
- Battery Energy Storage System (BESS) Commercial-scale lithium-ion battery energy storage systems providing load shifting, peak shaving and grid independence capabilities, enabling businesses to store excess solar energy and discharge during peak pricing periods as part of Wattstor's integrated on-site renewable energy systems.
- Fully Funded Energy Systems (Power Purchase Agreement) Turnkey financing, design, installation, operation and ongoing optimisation of on-site renewable energy systems (solar PV and battery storage) for commercial and industrial customers with zero upfront capital expenditure, delivered via 15–25 year Power Purchase Agreements through which customers purchase electricity at lower-than-grid rates while gradually gaining asset ownership.
- Wholesale Energy Trading Service Service enabling commercial and industrial customers to capture wholesale electricity market value through smart-fixed contracts with energy suppliers (e.g., Bryt Energy), with Wattstor trading battery assets directly in the wholesale market under its UK P415 Virtual Trading Party accreditation to monetise price volatility on behalf of customers.
Quantifiable outcome
- Reduces electricity costs by up to 70%
- +6 more outcomes
Companies that use Wattstor
Customer profileNamed customers6 records
Segments3 records
Ideal customer profiles4 records
Wattstor technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability3 records
Feature5 records
Wattstor partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered flagship, minor and core.
- LSN DiffusionflagshipWattstor partnered with LSN Diffusion, a specialist metallurgical manufacturer and one of Wales' largest exporters, to deliver a major on-site solar and battery storage project at its South Wales facility (Cilyrychen, Llandybie). Wattstor finances and installs 1.3MW of solar and a 5MWh BESS, supplying electricity under the Price Protect tariff. The project enables LSN Diffusion to avoid £1m grid upgrade costs and supports its export growth by meeting customer sustainability requirements.
- Freeths LLPminorFreeths provided legal advisory services to Wattstor for the LSN Diffusion transaction. The legal team was led by Corporate Partner Clare King.
- Bryt EnergyflagshipWattstor partnered with Bryt Energy to enable business energy customers to access wholesale electricity market trading opportunities through smart-fixed contracts. Wattstor integrates its Podium EMS with Bryt Energy's supply contracts to eliminate risks of direct wholesale price exposure while capturing trading benefits. The partnership oversees the switch from fixed contracts to smart-fixed contracts that maintain supply cost certainty while enabling market trading access.
- HEP (Hrvatska Elektroprievreda)flagshipWattstor partnered with HEP, the Croatian national energy supplier, to deploy EV charging infrastructure with BESS at a site in Kalovac County, Croatia. Wattstor supplied Podium EMS and containerised BESS (200 kW / 432 kWh) to enable peak-shaving and avoid costly grid upgrades. The project is a pilot intended to expand across other HEP service stations.
- NEXT-E ConsortiumcoreThe NEXT-E consortium is a cross-border initiative of leading electricity and oil & gas companies (E.ON Group, MOL Group, Hrvatska elektroprivreda, PETROL) and car manufacturers (Nissan, BMW) creating an interoperable EV charging network across Europe. The HEP-Wattstor EV charging project was funded under this consortium. Wattstor's involvement positions it as a technology partner for large-scale EV charging infrastructure deployments across the consortium's network.
- Modo EnergyminorModo Energy, an energy asset analysis platform, featured Wattstor CEO Stephan Marty on its Energy Academy podcast to discuss behind-the-meter energy management systems, future energy systems, and Wattstor's role in the C&I energy transition. This collaboration serves as a thought leadership and marketing channel.
- UK P415 Market Framework (Ofgem/National Grid)coreWattstor was approved as a Virtual Trading Party (VTP) under the UK P415 market framework, enabling it to trade wholesale electricity and access new value streams from customer-side assets. This regulatory accreditation enables direct participation in the wholesale electricity market and supports flexible, low-carbon energy solutions.
Scale indicators8 records
Recent moves6 records
Expansion highlights6 records
Wattstor competitors and assessment
Company assessmentDirect peers
- Anesco: UK-based developer of solar PV and battery storage solutions for commercial and industrial customers, including fully funded energy systems. Direct competitor in the C&I behind-the-meter solar + BESS + PPA space.
- Limejump: UK flexibility platform (now part of Statkraft) providing AI-driven energy management, VPP services and wholesale market access for distributed assets — directly comparable to Wattstor's Podium EMS and VTP trading proposition.
- Next Kraftwerke: German virtual power plant operator and direct wholesale market trader aggregating distributed energy assets across Europe. Comparable to Wattstor's VTP trading model and AI-driven optimisation across C&I portfolios.
- Stem Inc: US-listed AI-driven energy storage and optimisation company combining BESS hardware with a cloud-based EMS (Athena) to optimise behind-the-meter C&I assets — closely analogous to Wattstor's Podium + BESS integration.
- Lightsource BP: Major UK-headquartered solar developer with growing C&I behind-the-meter offering and PPA financing capability. Comparable scale and customer type, though materially larger and broader in scope than Wattstor.
- GridBeyond: UK/Irish demand-response and intelligent energy management platform using AI to optimise industrial and commercial energy use across multiple jurisdictions — directly comparable to Wattstor's Podium EMS proposition.
- Open Energi: UK-based demand-response and flexibility optimisation platform connecting C&I assets to wholesale and balancing markets. Comparable UK-market focus and AI-driven asset optimisation to Wattstor.
- Fluence: Global battery energy storage system provider (JV between Siemens and AES) with AI-driven optimisation software (Nispera). Competes with Wattstor on the C&I BESS + AI-EMS integration, though at significantly larger scale.
Broad incumbents
- ENGIE: Global energy major offering behind-the-meter solar, storage and energy-management solutions to C&I customers across Europe. Significantly larger and broader portfolio, but overlapping offering in Wattstor's target segments.
- EDF: French utility with established UK commercial energy supply business and growing behind-the-meter / flexibility offerings. Overlaps with Wattstor's PPA-driven C&I proposition and benefits from deeper balance sheet and customer base.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks7 records
Key highlights7 records
Customer concentration
Wattstor social profiles
Digital presenceWattstor financial estimates
Financial estimateRevenue estimate
Valuation estimate
Wattstor leadership team
Management profileNumber of profiles
Profiles4 records
Wattstor subsidiaries and ownership
Company hierarchySubsidiaries2 records
Wattstor funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Wattstor M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Wattstor
What does Wattstor do?
Wattstor finances, designs, installs and operates on-site renewable energy systems (solar PV and Battery Energy Storage Systems) for commercial and industrial customers, typically via 15–25 year fully funded Power Purchase Agreements with zero upfront capital expenditure. The AI-driven Podium Energy Management System optimises when to use, store, or trade electricity, complemented by the Price Protect capped-variable tariff and DC-coupled architecture that decouples solar capacity from grid connection limits. The offering is delivered primarily through long-term electricity supply agreements bundled with hardware, software and ongoing operations.
Is Wattstor a public or private company?
Wattstor is a private company. It is classified as private equity controlled and is currently operating.
When was Wattstor founded?
Wattstor was founded in 2013. It employs 11 to 50 people.
Where is Wattstor based?
Wattstor is headquartered in London, United Kingdom, in the Europe region.
How does Wattstor make money?
Three revenue lines are on record. Fully Funded Energy Systems (PPA) is the primary driver. The others are debt and Equity Financing for Project Portfolio and wholesale Energy Trading.
Who are Wattstor's main competitors?
Direct peers on record are Anesco, Limejump, Next Kraftwerke, Stem Inc, Lightsource BP, GridBeyond, Open Energi and Fluence. Broad incumbents are ENGIE and EDF.
Does Wattstor have an API?
No public API is recorded for Wattstor.
What industry is Wattstor in?
Wattstor's product category is Commercial and Industrial Energy Management. Its primary akta.pro industry code is EUAGACAJ, C&I Onsite/Behind-the-Meter Energy Supply (Solar, CHP, Microgrids), with a secondary code of EUAMABAJ, Solar Financing, Leasing & Ownership Platforms (Tax Equity, PPA, Securitization). Its NAICS code is 221114 and its SIC code is 4911.