What Saxovent does

Saxovent (legal entity: Saxovent Smart Eco Investments GmbH) is a Berlin-based, owner-managed private investment company founded in 1997 by Carsten Paatsch. The firm invests across the renewable energy value chain with a focus on wind, solar PV, battery storage, and energy management solutions, targeting German mid-sized companies (Mittelstand) in renewables, climate-tech startups, and institutional co-investors. Its operating activities include wind and solar project development, ownership of self-operated power plants as an Independent Power Producer (IPP) with 180+ MW of installed capacity, and commercial/technical plant management services delivered through wholly-owned subsidiary Windpunx (founded 2015–2018) and site acquisition via Powerbude (founded 2019). Subsidiary Saxovent Renewables provides full-service project planning, construction, and operation across Germany, with offices in Berlin, Oldenburg, and Hanover.

The business model combines three revenue streams: investment returns and capital gains from equity stakes in renewable energy companies (including minority positions in hellgrün, Einklang, Deutsche Sanierungsberatung, Ironwood Energy, H2air, and InvestInvent AG); electricity sales from self-operated wind and solar plants; and project development and management fees. The company has developed 400+ wind turbines with partners across Germany, France, USA, and Eastern Europe since 1999, representing 669 MW of total installed capacity by end of 2014 and supplying 900,000+ people with clean electricity. Recently, the platform has pivoted toward solar, evidenced by 2025 acquisitions of 13.6 MWp of rooftop PV (Fellensiek), 76 MWp of agri-PV (Orrön), and 81.8 MWp of ground-mounted solar (Milvio), plus a strategic partnership with Luxera Energy for battery storage (BESS) launching with a 6 MW / 15 MWh project in Alzey. A €70 million mezzanine facility from HANSAINVEST Real Assets (2023, up to 22-year term) anchors the capital base for continued wind and solar development.

Saxovent's competitive positioning rests on a 25+ year operating track record, a vertically integrated subsidiary structure, an extensive 20+ partner network, and a proprietary impact measurement model that quantifies CO2 avoidance per euro invested (claimed at 1+ million tonnes annually). The firm operates with a horizontal segmentation across Mittelstand, climate-tech startups, and institutional investors, and employs 51–100 staff. The company is privately held with no parent entity, no public listing, and no external PE/VC control; financial figures are not publicly disclosed.

Name

Saxovent

Legal name

Saxovent Smart Eco Investments GmbH

Website

https://saxovent.com

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

51–100 employees

Short description

Saxovent is a Berlin-based, owner-managed private investment company (founded 1997) that finances and develops renewable energy projects across wind, solar, and battery storage. It serves German Mittelstand companies, climate-tech startups, and institutional co-investors, combining direct project development, IPP operations, and a vertically integrated subsidiary structure.

Ownership category

akta.pro rank

Product category

Renewable Energy Investment

NAICS

Wind Electric Power Generation (221115)

SIC

Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Asset Management & Owner’s Engineering (Lifecycle Strategy, Budgeting, Technical Due Diligence) (EUAMAGAJ)

akta.pro secondary industry

Major Component Service & Overhauls (Gearboxes, Blades, Generators, Inverters, Turbines) (EUAMAGAF)

Keywords

• Renewable energy investments
• Wind energy development
• Solar project development
• Impact investing
• Energy project financing

Headquarters

HQ city

Berlin

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Investment Returns and Capital Gains: Returns generated through equity stakes in portfolio companies, exits via trade sales, IPOs, or secondary transactions. Saxovent takes minority and majority positions in renewable energy companies and realises value through growth and exit events.
2. Independent Power Producer (IPP) Operations: Self-operated renewable energy plants (wind and solar) generating revenue through electricity sales. The company operates over 180 MW of installed capacity through its IPP business unit.
3. Project Development Fees: Fees earned from developing renewable energy projects including wind farms, solar parks, and battery storage installations. Revenue generated at various stages from site identification through construction and commissioning.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Saxovent is an owner-managed renewable energy investment company that develops, finances, and operates wind, solar, and battery storage projects across Germany, France, the USA, and Eastern Europe. The company invests in mid-sized renewable energy companies (Mittelstand) and climate-tech startups, while operating an independent power producer (IPP) portfolio of 180+ MW self-operated wind and solar plants through its subsidiary Saxovent Renewables. It also provides strategic advisory, operational expertise, and growth capital to portfolio companies via its subsidiaries WindPunx (operations management) and Powerbude (land acquisition).

Product overview

Saxovent operates as an owner-managed investment company (100% since 1997) offering a portfolio of renewable energy products and services. The core offerings include Saxovent Renewables (full-service project development and IPP operations), WindPunx (technical/commercial plant management), and Powerbude (land acquisition). The company also maintains significant portfolio holdings including hellgrün (commercial rooftop solar), Einklang (battery-optimized Energy-as-a-Service for SMEs), Deutsche Sanierungsberatung (energy refurbishment consulting), InvestInvent (regulated investment fund management), and various international renewable energy companies. Together these enable end-to-end solutions from project development through operations, while the portfolio companies provide specialized services across solar, wind, battery storage, and agricultural technology sectors.

Differentiator

Problem solved

Functional benefit

Brands

• Saxovent Renewables: Full-service provider for renewable energy projects across the entire value chain including planning, building, and operating wind and solar parks.
• Windpunx
• Powerbude
• Ironwood Projects

Products and services

• Saxovent Renewables Full-service provider for renewable energy projects across the entire value chain. Plans, builds, and operates wind and solar parks as an independent power producer (IPP) across Germany, with offices in Berlin, Oldenburg, and Hanover.
• WindPunx Wholly-owned subsidiary providing commercial and technical operations management for wind and solar plants, supporting plant owners with operational excellence.
• Powerbude Wholly-owned subsidiary focused on land/space acquisition in northern Germany for renewable energy projects, securing suitable sites for wind and solar development.
• Impact Investment Management Investment services providing strategic and advisory support to portfolio companies with focus on measurable positive climate impact. Calculates CO2 avoidance per euro invested and supports companies through capital, mentorship, market access, and operational support across seed, growth, and majority positions.

Quantifiable outcome

• 1+ million tonnes CO2 avoided annually through developed renewable energy projects
• +3 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• Ironwood RenewablescoreStrategic or Co-development PartnerUS-based renewable energy company focused on community solar and utility-scale projects. Joint venture 'Ironwood Projects' established 2019 with target to expand portfolio from 300 MW to 1000 MW in USA. Saxovent providing millions in investment over 5 years.
• H2aircoreStrategic or Co-development PartnerFrench renewable energy company that plans, develops, realizes and operates wind and solar projects. Saxovent partnered with H2air for market entry into France, developing 21 wind turbines together.
• Luxera EnergycoreStrategic or Co-development PartnerStrategic partnership for battery energy storage systems (BESS). First project: 6 MW / 15 MWh battery storage in Alzey to strengthen regional grid stability. Luxera provides full BESS value chain from development to operation.
• WindPunxcoreOthers100% owned subsidiary of Saxovent providing commercial and technical operations management for wind and solar plants.
• PowerbudecoreOthers100% owned subsidiary focused on land/site acquisition for renewable energy projects in northern Germany.
• Saxovent RenewablescoreOthersFull-service provider for renewable energy projects across entire value chain including planning, construction, and operation of wind and solar parks.
• RenggliminorOthersSwiss company developing climate-friendly timber constructions in element and modular design for sustainable buildings.
• hellgrün energiecoreOthersCologne-based portfolio company enabling onsite PV and direct power models on commercial rooftops. Saxovent invested €500,000 in seed round and increased stake to become second-largest shareholder. Target of 100 MW on commercial rooftops by 2027.
• Einklang EnergycoreOthersCologne-based Energy-as-a-Service provider for German SMEs offering integrated electricity with battery storage and dynamic tariffs. Saxovent participated in €2.2M seed funding. Enables 30-40% electricity cost reduction for commercial customers.
• InvestInvent AGcoreOthersZurich-based FINMA-regulated manager of collective investments and pioneer in climate-friendly direct investments. Enables qualified investors to participate in renewable energy assets and timber construction real estate fund.
• SVG Ventures | THRIVEminorOthersVenture platform promoting food, agriculture and energy sectors towards sustainability through innovation.

Scale indicators12 records

Recent moves10 records

Expansion highlights7 records

Market position

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/saxovent

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments17 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Saxovent