Voltfang
Voltfang is a German climate tech company that designs and manufactures stationary battery storage systems built from second-life EV batteries for commercial, industrial, and grid-scale customers across the DACH region.
- Company typePrivate
- Founded2020
- HeadquartersAachen, Germany
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Voltfang does
Voltfang GmbH is an Aachen-based climate technology company that designs and manufactures stationary battery storage systems built from second-life electric-vehicle batteries, targeting commercial, industrial, and grid-scale customers across Germany and Austria. The company's core technology stack combines requalified lithium-ion battery modules (LFP for its current commercial Voltfang 3 line and NMC for prior generations) with an AI-assisted battery longevity evaluation system and a proprietary gentle-charging algorithm that limits the C-rate to enable a 10-year operational warranty. Production is centralized at what Voltfang describes as Europe's largest second-life battery factory in Aachen, with capacity expansion to 250 MWh by 2026 and a longer-term 1 GWh target.
Voltfang's product portfolio spans the modular Voltfang 1 Indoor system, the outdoor Voltfang 2 commercial unit, the liquid-cooled Voltfang 3 flagship (255 kWh to 4 MWh via AC-coupling), and the grid-scale Voltfang 3 Plus (from 5.3 MWh / 2.5 MW), all built around a proprietary Energy Management System (EMS) that enables peak shaving, self-consumption optimization, dynamic tariff integration, multi-use strategies, and intraday trading. The Alsdorf 20 MWh / 10 MW grid-scale project, directly connected to a substation in North Rhine-Westphalia, serves as the reference deployment for the utility-scale offering. The hardware is paired with software and services including the Venma web application, an Energy Trader module, and a Batteryflat extended-warranty service that covers up to 10 years and roughly 8,000 charging cycles.
The company monetizes primarily through hardware sales of integrated battery storage systems, complemented by subscription-style monitoring and warranty services, project planning and integration fees, and participation-linked optimization revenue from energy trading. Its go-to-market combines enterprise field sales with a partner network of certified electricians and PV installers, supplemented by a Deutsche Leasing financing partnership and a Pachtdirekt land-lease program. The customer base spans more than a dozen named enterprise and mid-market logos across manufacturing, logistics, retail, charging infrastructure, hospitality, agriculture, and the public sector. Across its seed (2023), Series A (October 2024, €8.8M), and Series B (June 2025, €15M) rounds, Voltfang has raised approximately €28.8 million in equity, led consistently by FORWARD.One, with Interzero participating in the Series A; in September 2025, the company added a binding €250 million project-finance commitment from Palladio Partners targeting grid-scale deployment in Germany through 2029.
Voltfang firmographics
Firmographics- Name
- Voltfang
- Legal name
- Voltfang GmbH
- Website
- https://voltfang.de
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Voltfang is a German climate tech company that designs and manufactures stationary battery storage systems built from second-life EV batteries for commercial, industrial, and grid-scale customers across the DACH region.
- Ownership category
- akta.pro rank
Voltfang industry classification
Industry- Product category
- Battery Energy Storage Systems
- NAICS
- Battery Manufacturing (33591)
- SIC
- Switchgear & Switchboard Apparatus (3613)
- akta.pro primary industry
- Battery Second-Life Repurposing & Integration (Stationary Reuse, Repack/Remanufacture) (EUAFACAG)
- akta.pro secondary industries
- Testing, Grading & State-of-Health (SoH) Diagnostics (EOL Assessment, Certification) (EUAFACAH), Battery Pack Repair/Remanufacturing & Module/Cell Replacement (TLAKAMAB), Lifecycle Analytics, LCA & Circularity Consulting (Footprinting, Material Flow Analysis) (EUAFACAK)
Keywords
Where Voltfang is headquartered
LocationHeadquarters
- HQ city
- Aachen
- HQ country
- Germany
- HQ region
- Europe
Offices3 records
Markets served
Voltfang business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Battery Storage Hardware Sales: Sale of commercial (Voltfang 3: 255 kWh-4 MWh) and large-scale (Voltfang 3 Plus: from 5.3 MWh) battery storage systems made from recycled EV batteries. Includes integrated inverter and EMS hardware. One-time purchase model with optional Batteryflat service for extended warranty and maintenance.
- Energy Management System (EMS) Services: 24/7 remote monitoring, maintenance, and service for battery storage systems. Includes software updates, performance analyses, and proactive service to ensure maximum system availability.
- Project Planning and Integration Services: End-to-end solution including potential analysis, technical planning, on-site consultation, permits, grid connection, installation, and commissioning. Central point of contact from start to finish.
- Batteryflat Service Package: Extended warranty and maintenance service covering up to 10 years and 7,300-8,000 charging cycles. Ensures battery module replacement when performance drops below specified thresholds.
- Energy Trading Optimization: Intelligent optimization of battery storage for participation in energy markets through intraday trading and multi-use strategies, enabling additional revenue streams for customers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Voltfang 3 Commercial Storage - Capacity from 255 kWh |
| Unit Pricing | Multi-year contract | Voltfang 3 Plus Large-Scale Storage - Capacity from 5.3 MWh |
| Subscription | Annual | Batteryflat Service Package |
| Other | One time/ perpetual license | Project-Based Installation Services |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels9 records
Voltfang product offering
Product offeringCore offering
Voltfang manufactures and supplies stationary battery storage systems built from repurposed (second-life) electric vehicle batteries for commercial, industrial, and grid-scale applications. The company offers an end-to-end energy solution including AI-validated battery testing, hardware systems (Voltfang 3, Voltfang 3 Plus), an integrated Energy Management System (EMS), and project planning through commissioning, with a 10-year durability guarantee.
Product overview
Voltfang is a climate tech company offering second-life battery storage systems for commercial and industrial applications. The product portfolio centers on three generations of battery storage hardware: the modular Voltfang 1 Indoor for smaller applications, the outdoor Voltfang 2 as a proven commercial solution, the current Voltfang 3 as the flagship liquid-cooled commercial system (255 kWh to 4 MWh via AC-coupling), and the Voltfang 3 Plus for large-scale grid applications (starting at 5.3 MWh). All systems are built around the proprietary Voltfang EMS platform, which provides centralized monitoring, automated optimization, and market integration. The EMS is complemented by the Venma web app for user management and the Energy Trader module for intraday trading and arbitrage strategies. Voltfang also offers Batteryflat service packages for extended warranties and Pachtdirekt for land lease arrangements. The company operates end-to-end from planning and installation through to operation and maintenance.
Differentiator
Problem solved
Functional benefit
Products and services
- Voltfang 3 All-in-one liquid-cooled commercial battery storage system built with LFP technology, scalable from 255 kWh to 4 MWh via AC coupling. Includes integrated inverter, AC sub-distribution, EMS hardware, IP55 protection, and aerosol extinguishing system. Designed for commercial and industrial customers seeking peak shaving, self-consumption optimization, and dynamic tariff integration.
- Voltfang 3 Plus Grid-scale battery storage system with capacity starting from 5.3 MWh and 2.5 MW power, featuring AC coupling, IP55 protection, operating range -35 to 55°C, and comprehensive certifications (UN38.3, UL1973, IEC62619, UL9540A, NFPA855, UL9540). Designed for grid operators, energy traders, and large-scale infrastructure projects.
- Voltfang 2 Proven all-in-one outdoor commercial storage solution featuring requalified NMC batteries from European automotive applications. Compact and quick to install for industrial energy requirements including peak shaving and self-consumption optimization.
- Voltfang 1 Indoor Flexible modular indoor battery storage system using requalified lithium-ion batteries from EV applications with capacities up to 33 kWh per cabinet. Designed for residential and small commercial use.
- Voltfang EMS (Energiemanagementsystem) Central integration platform that connects storage, systems, and energy markets. Provides real-time monitoring of consumption, generation, state of charge, and active use cases. Automatically optimizes charging/discharging based on market prices and grid conditions. Includes 24/7 remote monitoring, fault detection, and remote maintenance.
- Venma (Energy Management Web App) Web-based management platform providing live overview of consumption, generation, state of charge, self-sufficiency, and active use cases such as dynamic electricity prices, multi-use, peak load shaving, and self-consumption optimization.
- Voltfang Energy Trader Module enabling automated participation in electricity markets, supporting intraday trading and arbitrage strategies by automatically charging during low-price periods and discharging during high-price periods to maximize economic returns.
- Batteryflat Service Package Extended warranty and service package offering up to 10-year warranty with performance guarantee, battery module replacement when performance drops, and coverage of up to 7,300 cycles at 70% state of health.
- Pachtdirekt Land lease program enabling landowners to host battery storage systems on their property with predictable annual returns. Minimum 450 m² required for participation.
Quantifiable outcome
- Peak load reduction up to 37.5% (from 400 kW to 250 kW)
- +5 more outcomes
Companies that use Voltfang
Customer profileNamed customers15 records
Segments5 records
Ideal customer profiles4 records
Voltfang technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration6 records
AI capability4 records
Feature6 records
Voltfang partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- BidirexsupportiveImplementation partner for PV and charging park projects. Bidirex implements energy concepts for supermarkets utilizing Voltfang battery storage systems.
Scale indicators10 records
Recent moves8 records
Expansion highlights7 records
Voltfang competitors and assessment
Company assessmentDirect peers
- Connected Energy: UK-based specialist in second-life EV battery energy storage for commercial and grid applications. Closest direct competitor to Voltfang, with a similar 'second-life EV batteries → stationary BESS' model targeting European C&I and grid customers.
- B2U Storage Solutions: US second-life battery storage developer using retired EV batteries for grid-scale projects. Operates Sierra storage facility and a similar repurposing-centric business model, making it a direct peer in second-life grid ESS.
- Relectrify: Australia-based developer of battery management and second-life repurposing technology. Comparable to Voltfang on the AI/battery-health assessment and cell-level repurposing approach for stationary storage.
- TESVOLT: German commercial and industrial battery storage manufacturer based in Wittenberg. Competes head-to-head with Voltfang in the DACH C&I segment for commercial storage projects from tens of kWh to multi-MWh.
- Caterva: German commercial and grid battery storage spin-off focusing on distributed BESS in Germany. Directly competes with Voltfang in German commercial peak-shaving and grid-serving applications.
Broad incumbents
- Sonnen: Germany-based residential and small-commercial battery storage company (owned by Shell). A broader incumbent in the DACH ESS market that overlaps with Voltfang on commercial storage, although it does not specialize in second-life EV batteries.
- Fluence: Global utility-scale energy storage vendor (joint venture between Siemens and AES). Competes with Voltfang 3 Plus in grid-scale BESS projects in Europe, though Fluence uses new cells rather than second-life batteries.
- Tesla Energy: Tesla's energy business (Megapack, Powerpack) is a global BESS incumbent. Overlaps with Voltfang in commercial and grid-scale storage globally, with very different scale and unit economics but the same end customer set.
- Northvolt: European battery cell and systems maker with second-life and stationary storage initiatives. Comparable as a European player with end-to-end battery capability targeting ESS, though at much larger scale and using primarily new cells.
Others
- Interzero: German circular economy and recycling specialist that is both an investor in Voltfang (Series A) and a partner in battery take-back. Acts as an upstream supplier/ecosystem participant rather than a direct ESS competitor.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
Voltfang social profiles
Digital presenceVoltfang compliance and trust
Trust signalCompliance14 records
Voltfang financial estimates
Financial estimateRevenue estimate
Valuation estimate
Voltfang leadership team
Management profileNumber of profiles
Profiles4 records
Voltfang funding detail
Funding detailFunding overview
Funding rounds8 records
Investors12 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Voltfang 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 Voltfang
What does Voltfang do?
Voltfang manufactures and supplies stationary battery storage systems built from repurposed (second-life) electric vehicle batteries for commercial, industrial, and grid-scale applications. The company offers an end-to-end energy solution including AI-validated battery testing, hardware systems (Voltfang 3, Voltfang 3 Plus), an integrated Energy Management System (EMS), and project planning through commissioning, with a 10-year durability guarantee.
Is Voltfang a public or private company?
Voltfang is a private company. It is classified as venture growth investor backed and is currently operating.
When was Voltfang founded?
Voltfang was founded in 2020. It employs 101 to 250 people.
Where is Voltfang based?
Voltfang is headquartered in Aachen, Germany, in the Europe region.
How does Voltfang make money?
Five revenue lines are on record. Battery Storage Hardware Sales are the primary driver. The others are energy Management System (EMS) Services, project Planning and Integration Services, batteryflat Service Package and energy Trading Optimization.
Who are Voltfang's main competitors?
Direct peers on record are Connected Energy, B2U Storage Solutions, Relectrify, TESVOLT and Caterva. Broad incumbents are Sonnen, Fluence, Tesla Energy and Northvolt. Interzero is listed as an others.
Does Voltfang have an API?
No public API is recorded for Voltfang.
What industry is Voltfang in?
Voltfang's product category is Battery Energy Storage Systems. Its primary akta.pro industry code is EUAFACAG, Battery Second-Life Repurposing & Integration (Stationary Reuse, Repack/Remanufacture), with a secondary code of EUAFACAH, Testing, Grading & State-of-Health (SoH) Diagnostics (EOL Assessment, Certification). Its NAICS code is 33591 and its SIC code is 3613.