Volter

What Volter does

Volter Oy is a Finnish cleantech company, founded in 1997 and headquartered in Tupos, Finland, that designs and manufactures wood-gasification combined heat and power (CHP) systems under the Walter and Volter 40 brands. Each unit produces 50 kW of electrical power and 130 kW of thermal output from wood chips, using a patented process of low-oxygen, high-temperature gasification that feeds producer gas into an internal combustion engine driving a generator, with heat recovered for water or space heating. The Walter 2nd-generation powerplant (launched 2023) added modular scalability, improved usability, and remote control via the Volter Space cloud platform. Following the April 2025 acquisition of majority ownership by German biomass-boiler manufacturer Heizomat GmbH, Volter's portfolio also includes the Heizomat RHK-AK chain grate boilers (30-990 kW), HSK-RA fixed grate boilers (30-200 kW), articulated arm and rod discharge systems, and Heizohack chippers, with Volter acting as Heizomat's Finnish importer starting in 2026.

Volter monetizes primarily through capital-equipment sales of CHP plants and biomass boilers, distributed via a global network of trained partner-distributors (supplemented by direct sales in Finland and key accounts) and supported by the Volter Academy training program. Secondary revenue streams include cleantech productization consulting (design and engineering services to other green-tech companies) and contract manufacturing (e.g., reactor modules for Q Power's Harjavalta synthetic methane plant). Customer segments span independent farmers, communities and public-sector sites, property owners, industrial buyers (sawmills, greenhouses, manufacturers, hotels), and energy-park developers, with named installations across Finland, Sweden, Norway, Estonia, Italy, Switzerland, the UK, Japan, and Canada. Pricing is quote-based and not publicly disclosed. Volter operates a wholly-owned Canadian subsidiary (Volter Canada, opened 2018) and joint ventures in Japan (Volter Japan KK and Volter Akita KK, with Forest Energy Inc.), and runs a 200-unit-per-year production line at its Tupos facility.

Name

Volter

Legal name

Volter Oy

Website

https://volter.fi

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

11–50 employees

Short description

Volter Oy is a Finnish cleantech manufacturer founded in 1997 that builds wood-gasification combined heat and power systems (Walter/Volter 40, 50 kWe/130 kWt) and distributes Heizomat biomass boilers, serving farms, communities, and industrial buyers across more than ten countries via trained distributors.

Ownership category

akta.pro rank

Product category

Biomass Combined Heat and Power (CHP) Systems

NAICS

Power Boiler and Heat Exchanger Manufacturing (33241), Electric Power Generation (22111)

SIC

Cogeneration Services & Small Power Producers (4991), Engines & Turbines (3510), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Biomass Combustion & Boiler Island Technology (Grates, Fluidized Bed, Burners) (EUAAAGAG)

akta.pro secondary industries

Industrial Boilers, HRSGs & Steam Generators (IMAHAFAF), Onsite Low-Carbon Heat & CHP (Electrified CHP, Fuel Cells, Renewable CHP) (EUABAJAI)

Keywords

• Biomass combined heat power
• Wood gasification systems
• Biomass heating boilers
• Cleantech productization services
• Renewable energy equipment

Headquarters

HQ city

Tupos

HQ country

Finland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Walter CHP Systems Sales: Sale of Walter woodchip combined heat and power plants to customers globally. Products include Walter powerplants and Volter 40 CHP systems for communities, farms, businesses, and energy parks.
2. Heizomat Heating Systems Sales: Sale of Heizomat biomass boilers (RHK-AK chain grate, HSK-RA fixed grate), discharge systems, and chippers under Heizohack brand for properties, farms, and industry.
3. Productization Services: Cleantech productization services helping other companies turn innovations into commercial products. Volter provides design, engineering, and production expertise. Focuses on domestic Finnish customers.
4. Manufacturing Services: Manufacturing of steel structures and modules for partners like Q Power, including reactor modules for methanation plants. Example: manufacturing modules for Harjavalta synthetic methane production plant.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

Volter designs, manufactures, and sells wood gasification-based combined heat and power (CHP) systems under the Walter brand, producing 50 kW electrical power and 130 kW heating power from wood chips. The company also distributes Heizomat biomass boilers (30-990 kW chain grate and fixed grate), discharge systems, and Heizohack chippers in Finland. Additional offerings include the Volter Space cloud monitoring platform, Volter Academy distributor training, and cleantech productization engineering services.

Product overview

Volter offers two core product lines: the Walter woodchip powerplant series (combining the Walter Powerplant, Volter Space cloud monitoring platform, and Volter Academy training) providing 50 kW electrical and 130 kW heating output through wood gasification technology; and the Heizomat biomass heating system sub-brand (including RHK-AK chain grate boilers 30-990 kW, HSK-RA fixed grate boilers 30-200 kW, articulated arm and rod discharge systems, and Heizohack chipping equipment) for automated biomass heating. Additionally, Volter provides cleantech productization consulting services to help other companies bring green technology to market, and maintains a global distributor network supported by training programs.

Differentiator

Problem solved

Functional benefit

Brands

• Walter: 2nd generation woodchip powerplant for combined heat and power (CHP) production from biomass. Produces 50kW electric power and 130kW heating power.
• Heizomat
• Heizohack
• Volter Academy

Products and services

• Walter Woodchip Powerplant Wood gasification-based combined heat and power (CHP) system that produces 50 kW electrical power and 130 kW heating power from wood chips. The 2nd generation Walter plant offers improved power output, usability, and ease of maintenance compared to the original Volter 40 model, and is sold to farmers, communities, businesses, and energy parks globally.
• Heizomat RHK-AK Chain Grate Boiler

Quantifiable outcome

• 89% carbon footprint reduction for farms (Cairnhill Farm case study)
• +5 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Q PowercoreStrategic or Co-development Partner · 8 March 2023Power-to-x technology company collaborating with Volter on manufacturing steel structures for reactor modules. Contract for Harjavalta methanation plant where Volter delivers modules for Finland's first industrial-scale synthetic methane production plant. Cooperation began in design of methanation solution from prototype to commercial entity.
• Forest Energy Inc.coreChannel Partner/ Reseller/ Distributor · 17 November 2018Japanese biomass power plant developer and operator became distributor for Volter in Japan. New jointly held company Volter Japan KK focuses on sales while Volter Akita KK handles technical services. Forest Energy focuses on smaller segment under 2MW and has partnerships with Syncraft (Austria) for 500kW CHPs and Cortus Energy (Sweden) for 2MW CHPs.
• FinnmammutminorChannel Partner/ Reseller/ DistributorFinnish company handling maintenance for Heizomat products throughout Finland. Contact: +358 600 061001 (€0.97/min + local/mobile network charge). Part of Heizomat after-sales support ecosystem.
• P2X SolutionsminorChannel Partner/ Reseller/ DistributorCustomer of Q Power for Harjavalta green hydrogen plant. Part of the supply chain for synthetic methane production where Volter manufactures modules.
• T&G NordicminorStrategic or Co-development PartnerPartner in productization projects providing electrical, automation, and programming design services. Brings expertise and resources to ensure quality execution within schedule and budget.
• Huld OyminorStrategic or Co-development PartnerDesign engineering company founded by Mika Kiljala with approximately 500 designers. Discussed in productization tips series as example of successful productization partner.
• HEMITIG OYminorStrategic or Co-development PartnerWelding company providing high-quality welding expertise for Volter's productization services. Featured in productization tips series discussing welded structures in product design.
• Syncraft EngineeringminorChannel Partner/ Reseller/ DistributorAustrian manufacturer partnered with Forest Energy for 500kW CHP systems. Part of Forest Energy's biomass solution portfolio in Japan.
• Cortus EnergyminorChannel Partner/ Reseller/ DistributorSwedish manufacturer partnered with Forest Energy for 2MW CHP systems. Part of Forest Energy's biomass solution portfolio in Japan.

Scale indicators8 records

Recent moves9 records

Expansion highlights6 records

Broad incumbents

• Valmet: Finnish industrial process and bioenergy technology supplier with biomass-fired heat and power plant offerings. Comparable to Volter in the biomass-to-energy value chain and Finnish industrial heritage, but serves much larger utility and industrial customers.
• Viessmann: Large German heating, industrial, and refrigeration systems manufacturer with a significant biomass/biothermal product portfolio. Broad incumbent in the same biomass heating segment where Volter's Heizomat line competes, with much wider distribution and brand recognition.
• Polytechnik: Austrian manufacturer of biomass combustion plants, ORC turbines, and flue gas cleaning for industrial-scale biomass heat and power. Comparable to Volter on biomass-based power generation and emissions-control technology, but at much larger utility/industrial scale.
• ANDRITZ: Austrian industrial group supplying biomass boiler islands, flue gas cleaning, and power generation equipment globally. Comparable to Volter on biomass-fired power and heat technology, though at significantly larger scale and project size.
• Heizomat GmbH: German manufacturer of biomass boilers, heating systems, chippers, and discharge equipment; Volter's majority shareholder since April 2025 and the originator of the Heizomat product line Volter distributes. Overlapping product portfolio and biomass-energy focus, but at a much larger established scale.

Direct peers

• Syncraft Engineering: Austrian manufacturer of biomass-based combined heat and power (CHP) plants in the sub-MW class. Directly comparable to Volter: both build fixed-bed biomass gasification CHPs for community, agricultural, and small industrial customers, and Syncraft is already a competing offering inside Volter's Japanese distributor Forest Energy's portfolio.
• Cortus Energy: Swedish developer of biomass gasification-based CHP systems around the 2 MW class. Comparable to Volter on core technology (wood gasification for combined heat and power) and target segments, and is also distributed by Forest Energy in Japan alongside Volter.
• Spanner Re²: German manufacturer of biomass CHP plants using Holzgas (wood gas) technology, in the same sub-MW scale as Volter's Walter. Directly comparable on gasification-based CHP for farms, businesses, and municipalities in DACH and beyond.
• Burkhardt GmbH: German supplier of biomass combined heat and power plants, primarily in the 50–250 kWe range built around internal combustion engines running on wood gas. Closely comparable to Volter's Walter in output class, fuel, and end-market.
• KWB – Kraft und Wärme aus Biomasse: Austrian manufacturer of automated biomass heating systems (pellet, wood chip) in the residential, agricultural, and small commercial segment. Comparable to Volter's Heizomat biomass boiler line on technology, customer profile, and automation approach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/volter.fi
• LinkedInlinkedin.com/company/volter-oy

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries3 records

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 Volter