Balance of Storage Systems

What Balance of Storage Systems does

Balance of Storage Systems AG (BOS) is a privately held German energy storage company founded in 2014 and headquartered in Ulm that designs and sells lithium iron phosphate (LiFePO4) battery systems targeted at off-grid, mini-grid, mobile, and remote industrial applications. Its product portfolio centers on a proprietary smart Battery Management System (BMS) governing hybrid lithium-and-lead-acid configurations, integrated cell heating for sub-10°C operation, and a modular architecture scalable from 2.5 kWh residential units to turnkey MWh-class systems. Core SKUs include the LE300 hybrid lithium battery for RV and marine retrofits, the BOS Battery S modular platform with hot-swappable 12V batteries for continuous industrial operations, BOS System One for small solar-island deployments, BOS System Pro for off-grid and mini-grid projects up to 300 kWh (with MWh customization), and the recently listed BOS Battery X.

The company reports more than 22 MWh of total installed capacity globally and serves customers across Europe, Sub-Saharan Africa (Malawi and Mozambique health-center and community-solar projects), and other international markets. Revenue is generated primarily through hardware sales of battery systems, distributed via an authorized dealer and partner network for SMB and residential buyers, a Shopify-based direct-to-consumer online shop, and a regional sales team handling commercial and customized mini-grid deployments. A secondary revenue stream consists of IT Advisory Hours, sold as flexible 15-minute-increment contingents delivered remotely via Microsoft Teams. With 11–50 employees, BOS operates as a focused specialty hardware vendor rather than a mass-market player, and its competitive positioning rests on hybrid chemistry flexibility, cold-climate cell heating, and modular hot-swappable architecture for industrial uptime.

Name

Balance of Storage Systems

Legal name

BOS Balance of Storage Systems AG

Website

https://bos-ag.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Energy Storage Systems

NAICS

Battery Manufacturing (335910)

SIC

Motors & Generators (3621)

akta.pro primary industry

Battery Management Systems (BMS) & Safety Controls (EUAFAAAD)

akta.pro secondary industries

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Battery Management Systems (BMS) & Pack Electronics Manufacturing (EUAFABAJ)

Keywords

• Lithium battery storage
• Off-grid energy systems
• LiFePO4 battery solutions
• Modular energy storage
• Hybrid battery management

Headquarters

HQ city

Stuttgart

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Energy Storage Hardware Sales: Sale of lithium battery systems including LE300, BOS Battery S, BOS System One, and BOS System Pro. Products are sold through authorized partners, online shop, and direct sales for commercial projects. Hardware includes modular batteries with 3-year warranty on lithium batteries and 5-year warranty on system components.
2. IT Advisory Services: Flexible advisory hours providing access to BOS IT expertise for discovery sessions, workshops, assessments, and technical guidance. Billed in 15-minute increments at agreed commercial rates. Validity period of 6 months standard, 12 months for larger contingents. May transition to fixed-price projects.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels8 records

Core offering

BOS designs, manufactures, and sells lithium iron phosphate (LiFePO4) battery energy storage systems engineered for off-grid, mobile, and industrial applications. The portfolio spans the LE300 hybrid lithium-lead battery for RVs and marine use, the modular hot-swappable BOS Battery S platform for continuous industrial operations, and turnkey solar island / mini-grid systems (BOS System One and BOS System Pro) scalable from residential kWh configurations up to MWh-range commercial deployments. The company also provides paid IT Advisory Hours consulting delivered remotely.

Product overview

BOS Balance of Storage Systems AG offers a portfolio of lithium energy storage products and systems designed for off-grid, mobile, and industrial applications. The product lineup centers on LiFePO4 battery technology and includes the LE300 hybrid lithium-lead battery for RVs and marine use, the modular BOS battery S platform with hot-swappable 12V batteries for industrial continuity, the BOS system one for small-scale solar island applications, and the BOS system pro for configurable off-grid and minigrid deployments up to MWh scale. Additionally, BOS offers IT Advisory Hours consulting services. All products feature battery management systems (BMS) and smart load management, with the company having deployed over 22 MWh of total installed capacity worldwide.

Differentiator

Problem solved

Functional benefit

Brands

• LE300: The lithium battery to combine with lead-acid batteries for hybrid energy storage solutions.
• BOS Battery S
• BOS System One
• BOS System Pro

Products and services

• LE300 Hybrid lithium iron phosphate (LiFePO4) battery designed to combine with existing 12V lead-acid batteries. Features integrated cell heating for cold-environment operation and a smart Battery Management System (BMS). Used in recreational vehicles, boats, and other mobile applications where existing lead-acid charging infrastructure should be retained.
• BOS Battery S Smart modular energy storage system featuring hot-swappable 12V lithium batteries that can be exchanged in seconds while depleted units recharge in parallel, enabling continuous power for industrial operations. Composed of modular batteries mounted in the BOS frame S and connected via BOS hub S. Designed for industrial environments and applications requiring uninterrupted power.
• BOS System One Solar island energy system for off-grid applications. Provides electricity where grid access is unavailable or unreliable, designed as a turnkey solution for small-scale renewable energy deployments.
• BOS System Pro Configurable lithium battery energy storage system for off-grid and mini-grid solutions. Designed as a turnkey solution for challenging and remote areas. Standard configurations scale up to 300 kWh; customized commercial and development-sector systems are available up to MWh capacities.
• IT Advisory Hours Contingent Flexible advisory service providing access to BOS IT expertise for discovery sessions, workshops, assessments, and decision-making support. Delivered remotely via Microsoft Teams with time tracked in 15-minute increments at agreed commercial rates. Standard validity of 6 months; extended validity of 12 months for larger contingents. Unused hours expire after the validity period; may transition into fixed-price projects.

Quantifiable outcome

• 22 MWh+ total installed capacity worldwide
• +1 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration8 records

Feature5 records

Partnerships

One partnership is on record.

• VotronicminorChannel Partner/ Reseller/ DistributorVotronic provides State of Charge (SoC) displays for Erwin Hymer Group brands compatible with BOS LE300 systems. These displays can be ordered through authorized dealers and are specifically configured for BOS battery integration.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• E3/DC: German manufacturer of residential and small-commercial LiFePO4 storage systems (subsidiary of Hager Group). Overlaps directly with BOS on German-market home and small-commercial battery storage offerings.
• Alpha ESS: China-based LiFePO4 energy storage manufacturer focused on residential, commercial, and off-grid/microgrid applications. Highly comparable product portfolio including modular hybrid storage systems for off-grid deployments.
• Sonnen (sonnen GmbH): Germany-based residential energy storage company (now part of Enphase) focused on LiFePO4 home battery systems and virtual power plants. Direct peer in the German/European home-storage segment targeting residential and prosumer customers.
• Pylontech: Chinese LiFePO4 module manufacturer dominating the residential and small-commercial energy storage market with stackable rack-mounted packs. Comparable modular, scalable LiFePO4 architecture sold globally through distribution.
• Victron Energy: Dutch manufacturer of off-grid and marine energy storage/inverter systems with deep RV and remote-area footprint. Directly comparable to BOS on LiFePO4-based modular storage for off-grid, marine, and mobile applications.
• Senec (Senec GmbH): German home and small-commercial LiFePO4 battery storage provider with comparable modular system design and dealer-channel distribution model. Direct overlap with BOS in the German residential storage market.

Emerging players

• Enphase Energy: US-headquartered microinverter and home battery (IQ Battery) provider with growing European footprint via the Sonnen acquisition. Comparable in modular residential LiFePO4 storage with smart BMS integration.
• Growatt: China-headquartered inverter and storage provider offering modular home and small-commercial LiFePO4 storage systems. Comparable on modular residential/small-commercial architecture and global distributor-led GTM.

Broad incumbents

• BYD Energy Storage: Global leader in LiFePO4 battery cells, modules, and BESS, supplying residential through utility-scale storage systems. Relevant as a broad incumbent with both cells and pack/system offerings overlapping BOS's product category.
• Tesla (Powerwall / Megapack): Tesla's Powerwall targets home storage and Megapack targets utility-scale BESS, spanning BOS's addressable segments. As a dominant incumbent in LiFePO4 storage, Tesla defines pricing expectations across BOS's served markets.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCTlQr1AUo4n6OXH7_pqcf_A
• Facebookfacebook.com/balanceofstoragesystems
• LinkedInde.linkedin.com/company/bos-balance-of-storage-systems-ag
• Instagraminstagram.com/bos.stories
• Xx.com/bos_ag

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds2 records

Investors2 records

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 Balance of Storage Systems