Energy Storage
Utility-scale BESS, hybrid solar+storage, microgrids, behind-the-meter industrial systems, grid-services dispatch, second-life batteries and long-duration storage — VoltWatt designs, finances and operates the storage asset that turns flexibility into long-term clean revenue.
Storage Capabilities
Eight complete storage solutions for every site and every revenue strategy — from behind-the-meter industrial systems to multi-hundred-MWh grid-scale plants, second-life batteries and long-duration storage.
Commercial & Industrial Storage
Behind-the-meter battery systems for factories, logistics hubs and data centres — peak shaving, tariff optimisation and resilience against grid disruption.
- 100 kWh to 20 MWh systems
- Peak shaving & demand-charge reduction
- Backup power & grid-outage resilience
- Pairs with on-site solar for self-consumption
Second-Life Batteries
Repurposed EV batteries given a second decade of useful life — circular-economy storage that cuts CAPEX, embedded carbon and ESG reporting friction.
- 30-50% CAPEX reduction vs new cells
- Up to 70% lower embedded carbon
- Ideal for C&I peak shaving & backup
- Full traceability for CSRD reporting
Off-Grid & Remote Sites
Containerised solar + storage systems for mines, telecom towers, base camps and ferry terminals — autonomous clean power where the grid does not reach.
- Fully containerised, plug-and-play
- Solar + BESS + optional backup genset
- Up to 90% diesel displacement
- Rapid deployment in 8 to 12 weeks
Microgrids & Islands
Resilient hybrid microgrids combining solar, storage and smart control — energy sovereignty for islands, remote communities and critical industrial sites.
- Up to 95% renewable penetration
- Black-start & grid-forming inverters
- Diesel offset & fuel-cost reduction
- SCADA & remote dispatch included
Hybrid Solar + Storage
Co-located battery storage that turns intermittent solar into dispatchable, 24/7 firm capacity — capturing arbitrage, capacity and ancillary revenues on a single grid connection.
- AC- and DC-coupled architectures
- Capture-rate uplift on existing PV assets
- Shared grid connection, faster permitting
- Bankable for hybrid PPAs
Grid Services (FCR / aFRR / Capacity)
Pre-qualified BESS assets bidding into European balancing markets — FCR, aFRR, mFRR, capacity mechanism and decarbonised flexibility tenders, optimised by our AI dispatch engine.
- FCR, aFRR & mFRR pre-qualification
- French capacity mechanism participation
- CRE flexibility tender experience
- Stacked revenue optimisation 24/7
Long-Duration Storage (LDES)
Eight-hour-plus storage technologies — flow batteries, iron-air, compressed-air — that shift renewable energy across days and seasons for deep decarbonisation.
- 8 to 100+ hour discharge duration
- Flow, iron-air & emerging chemistries
- Seasonal & multi-day arbitrage
- Unlocks 90%+ renewable grids
Utility-Scale BESS
Multi-megawatt-hour battery plants connected to the transmission grid — arbitrage, capacity markets and ancillary services stacked under one optimised dispatch.
- 10 MWh to 500+ MWh installations
- 2-hour to 8-hour duration configurations
- LFP chemistry, Tier-1 OEMs only
- Direct HV connection & PPA-ready
From kilowatt-hour to dispatchable revenue
Battery storage is now the most strategic asset on the European grid — but only when designed, financed and dispatched by true specialists. VoltWatt turns every cycle into stacked revenue and turns intermittent renewables into 24/7 firm green power.
Stacked revenue, one asset
Energy arbitrage, capacity payments, FCR/aFRR ancillary services and corporate tolling — VoltWatt monetises every megawatt-hour across multiple revenue streams to push project IRR beyond standalone economics.
Safe, bankable, LFP-only
Lithium iron phosphate (LFP) chemistry, Tier-1 OEMs, full thermal management and fire suppression, 95%+ availability guarantees — storage assets that senior lenders and insurers underwrite without discount.
The flexibility Europe needs
200 GW of storage by 2030 — Europe cannot decarbonise without it. VoltWatt turns intermittent renewables into 24/7 firm green energy and unlocks the grid capacity needed for the next industrial wave.
Discover what our storage expertise can do for your industrial site, your renewable portfolio or your investment fund.
Talk to our storage teamStorage Solutions For Your Business
Whether you run heavy industry, own grid-adjacent land, manage an infrastructure fund or operate the grid itself — we structure storage partnerships that turn flexibility into long-term, stacked revenue.
Industrials & Data Centres
Cut your peak-demand charges by up to 30%, ride through grid outages without diesel and lock in stable energy costs for 20 years. We finance, build and operate behind-the-meter BESS sized to your load curve and tariff structure.
- Peak shaving & demand-charge optimisation
- Grid-outage backup & resilience
- CSRD-ready clean-energy reporting
Landowners & Site Hosts
Earn 25 years of stable, inflation-linked rental income by hosting a utility-scale BESS on under-utilised industrial land, substation parcels or brownfields — minimal footprint, no agricultural conflict, full VoltWatt management.
- Long-term land rental income
- Compact footprint (1-3 hectares typical)
- Zero upfront investment, full VoltWatt EPC
Investors, Funds & IPPs
Acquire, co-develop or refinance bankable storage portfolios across France and Europe — standalone BESS, hybrid solar+storage and long-duration assets, with revenue-stacking strategies that maximise merchant-tail upside.
- Greenfield, ready-to-build & operating BESS
- Stacked revenue: arbitrage + capacity + ancillary
- EU taxonomy & SFDR-aligned
Utilities, TSOs & Grid Operators
Procure flexibility, capacity and ancillary services at scale through long-term tolling agreements with VoltWatt-owned BESS — accelerate renewable integration and defer costly grid reinforcements.
- Long-term tolling & capacity contracts
- FCR / aFRR / mFRR pre-qualified assets
- Grid-reinforcement deferral solutions
Storage Project Lifecycle
A structured four-phase approach with clear milestones, transparent costs and minimal disruption to your site or grid operations.
Grid & Revenue-Stack Study
Grid-connection diagnostics, market-revenue modelling (arbitrage, capacity, ancillary), sizing optimisation and bankability assessment — delivered in 4 to 6 weeks.
Permitting & ICPE Compliance
ICPE classification, environmental impact studies, fire-safety dossiers, local consultation and full permit acquisition for utility-scale and C&I storage projects.
EPC, Commissioning & Pre-Qualification
Tier-1 BESS procurement, civil works, MV/HV connection, SCADA integration, market pre-qualification (FCR/aFRR/capacity) and grid commissioning under EPC turn-key contracts.
Dispatch, O&M & Asset Management
20+ years of AI-driven dispatch optimisation, predictive maintenance, augmentation planning and revenue management — every euro of stacked margin captured.
Smart Storage Innovation
Combining Tier-1 LFP cells, an AI dispatch engine and a cell-level digital twin to extract every euro of value from every charge/discharge cycle — and to forecast revenue 30 days ahead.
AI Dispatch Engine
Reinforcement-learning agents bid your BESS into spot, intraday, capacity and ancillary markets every 5 minutes — squeezing the last euro of value out of every charge/discharge cycle.
Digital Twin & Augmentation
Cell-level digital twin tracks state-of-health, degradation and round-trip efficiency in real time — and plans capacity augmentation 24 to 36 months ahead of warranty thresholds.
LFP-Only, Tier-1 Safety
Lithium iron phosphate cells only — the safest commercial chemistry available. Multi-stage fire detection, gas venting and water-mist suppression engineered to NFPA 855 and UL 9540A.
Storage deployed at every scale
From multi-hundred-megawatt-hour grid-services plants to behind-the-meter C&I installations, hybrid PV+storage farms and off-grid microgrids — proven deployment archetypes from VoltWatt and our European peers.
Utility-Scale BESS · Occitanie
120 MWh · 2-hour duration · FCR & arbitrage
Off-Grid Mining Hybrid · West Africa
25 MWh + 18 MWp PV · 85% diesel offset
Hybrid PV + Storage · PACA
60 MWh co-located · CRE hybridisation tender
C&I Behind-the-Meter · Auvergne-Rhône-Alpes
4 MWh · Industrial peak shaving · 25-year tolling
Grid Services BESS · Hauts-de-France
200 MWh · aFRR + capacity market participation
Coastal Microgrid · French Overseas
15 MWh + 10 MWp PV · 95% renewable penetration
Illustrative deployment archetypes drawn from VoltWatt and European industry references. Named project case studies are shared under NDA on request.
A storage partner built for the next twenty-five years
European industrials, utilities, TSOs and infrastructure funds choose VoltWatt because we own every step of the storage value chain — from the grid study and ICPE permit to the megawatt-hour we bid into European balancing markets in your name. One team. One accountability. One twenty-five-year horizon.
Development, financing, EPC, dispatch optimisation and market trading under one roof — every euro of stacked storage margin captured, none lost to subcontractors.
Arbitrage + capacity + FCR/aFRR + tolling — our AI dispatch engine routes every MWh to the highest-value market 24/7, lifting project IRR by 200 to 400 basis points.
From C&I behind-the-meter systems to multi-hundred-MWh utility plants, hybrid PV+storage and long-duration projects — operational and under development across France and Europe.
Lithium iron phosphate cells exclusively — engineered to NFPA 855 and UL 9540A, with multi-stage fire detection, gas venting and water-mist suppression accepted by senior lenders and global re-insurers.
Pre-qualified for FCR, aFRR, mFRR, the French capacity mechanism, CRE flexibility tenders and TSO ancillary markets in France, Germany, Spain, Italy and the UK — one operator, every revenue stream.
We do not flip projects — we own, operate, augment and re-power every BESS over its full 25-year life. Your storage partner is still here when warranty cycles, augmentation rounds and revenue re-contracting matter most.
Storage that pays back to the planet and the territory
A BESS is not just a financial asset. Each megawatt-hour stored cuts emissions, reinforces European sovereignty, anchors qualified jobs in the host region and protects industry from grid instability.
Deep Decarbonisation
Each GWh of stored renewable energy displaces 400 to 600 tonnes of CO₂ equivalent that would otherwise come from gas peakers and coal — directly cutting national emissions intensity.
European Energy Sovereignty
Storage cuts dependence on imported fossil fuels, stabilises domestic power costs against geopolitical shocks and keeps the energy euro circulating inside Europe.
Local Economic Value
Long-term land rents, qualified O&M jobs, civil-works contracts for regional EPCs and stable tax revenue — every BESS injects between €5 M and €30 M into its host territory over 25 years.
Grid Resilience
Storage absorbs renewable peaks, smooths frequency, provides black-start capability and shields industry from outages — the backbone of a 90%+ renewable grid that still runs 24/7.
Sustainable BESS, by design
Circular by Design
LFP cells are cobalt-free and over 95% recyclable. Every VoltWatt BESS leaves the site with a contractual end-of-life recovery plan signed with EU-certified battery recyclers.
Second-Life Integration
We integrate repurposed EV battery packs in our C&I systems whenever life-cycle economics support it — cutting embedded carbon by up to 70% versus new-cell installations.
European Supply Chain
We prioritise European and allied-country battery cells, EU-built power electronics and regional civil-works contractors — shortening supply chains and meeting the Critical Raw Materials Act.
Get a tailored storage proposal in 5 working days
Tell us about your industrial site, your grid-connection rights or your renewable portfolio. Our storage team sends back a sizing study, a revenue-stack estimate, the best financing model and references of similar VoltWatt projects — confidential, no obligation.
- Optimal BESS sizing & 20-year revenue stack
- Recommended financing model (own, tolling or hybrid PPA)
- References of similar VoltWatt storage projects
Response within 5 working days · Confidential · No obligation
Frequently Asked Questions
Everything you need to know about VoltWatt's storage solutions — for industry, grid services, hybrid PPAs and long-duration applications.
What energy storage technologies does VoltWatt use?
VoltWatt deploys lithium-ion battery energy storage systems (BESS) ranging from 5 MWh to 500+ MWh capacity. We use advanced lithium iron phosphate (LFP) chemistry for its superior safety profile and 20+ year lifespan.
How does energy storage complement VoltWatt's renewable energy projects?
Energy storage solves the intermittency challenge of solar and wind by storing excess generation and releasing it during peak demand or low-production periods. VoltWatt co-locates storage with generation assets to maximize grid value.
What is the ROI on VoltWatt energy storage projects?
VoltWatt storage projects typically achieve positive returns within 5-8 years through revenue stacking: energy arbitrage, frequency regulation, capacity payments, and peak shaving.
How does VoltWatt manage battery safety and environmental impact?
VoltWatt uses LFP battery chemistry with the highest safety ratings, implements advanced thermal management and fire suppression systems, and designs all installations to meet or exceed European safety standards.
Can VoltWatt storage systems provide grid services?
Yes, VoltWatt storage systems actively participate in grid balancing markets across Europe. Our intelligent control platform enables automatic frequency response, voltage regulation, and peak demand management.
Turn your site into a dispatchable green-energy asset
Talk to our storage team for a tailored sizing study and unlock decades of stacked, inflation-linked revenue from your industrial site, your grid-connection rights or your investment fund.
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