What Sonnenkraft does

Sonnenkraft GmbH is an Austrian manufacturer of renewable energy system solutions, founded in 1991 and headquartered in St. Veit an der Glan, Carinthia. The company designs and produces photovoltaic modules, hybrid and standard inverters, modular battery storage systems, solar thermal collectors, and hot water and buffer storage tanks, marketed under the KIOTO SOLAR and SONNENKRAFTWERK brands. Manufacturing is conducted at facilities in St. Veit/Glan and Wies (Austria) and Neuruppin near Berlin (Germany), with CO2-friendly production and a circular economy positioning. Managing Director Peter Prasser leads the privately-held company, which is a GmbH registered in Klagenfurt with no disclosed external institutional ownership.

The product portfolio spans residential, commercial, and specialized applications, including standard PV modules (325-470 Wp), Power module variants for high-glare and alpine conditions, SONNENGLÄSER building-integrated PV (BIPV) glass products for facades, roofs, and balconies that are DIBt-approved for use as construction elements, and the award-winning SONNENKRAFTWERK plug & play balcony system. Storage products range from modular residential batteries (12.44-29.03 kWh) to the SKB-MAX all-in-one AC-coupled commercial system (up to 215 kWh), with a 10-year warranty and app/web-based remote monitoring. The portfolio is augmented by solar thermal collectors (SKR500, PFM) and storage tanks (300-1500 liters) for hot water and buffer applications.

Sonnenkraft operates a pure channel-partner go-to-market model, distributing exclusively through certified installers, electricians, PV specialists, battery partners, facade specialists, and wholesalers across 35+ countries in Europe and South America. Revenue is generated through unit-pricing of hardware sold via this network, supplemented by partner training, certification, and technical support services. The company claims over 1 million satisfied customers, reports customer energy cost savings of up to 75%, and cites 6-7 year payback periods for the plug & play system. Recent product launches (SKB-MAX, SONNENKRAFTWERK, rear-side contact modules), ecosystem partnerships (SmartFox, KRANNICH SOLAR), and expansion into Argentina and Brazil indicate an ongoing push upmarket and into adjacent segments, though the company remains a private, family/operator-controlled industrial business without disclosed funding rounds or external investors.

Name

Sonnenkraft

Legal name

Sonnenkraft GmbH

Website

https://sonnenkraft.com

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

101–250 employees

Short description

Sonnenkraft GmbH is an Austrian manufacturer (founded 1991) of integrated solar energy system solutions — PV modules, inverters, battery storage, and solar thermal products — sold exclusively through a certified installer and wholesale partner network spanning 35+ countries in Europe and South America.

Ownership category

akta.pro rank

Product category

Solar Energy Equipment Manufacturing

NAICS

Battery Manufacturing (33591)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Solar PV Module & Cell Manufacturing (Crystalline, Thin-Film) (EUAMAHAA)

akta.pro secondary industries

Solar PV Module Manufacturing (Cells, Modules, Thin-Film) (EUAMABAD), Energy Storage Components for Renewables Manufacturing (BESS Packs, PCS, Thermal Management) (EUAMAHAI), Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ), Renewable Monitoring, Controls & SCADA Hardware Manufacturing (Sensors, RTUs, Meters) (EUAMAHAJ)

Keywords

• Solar photovoltaic modules
• Battery storage systems
• Building integrated PV
• Solar thermal collectors
• Hybrid inverters

Headquarters

HQ city

Sankt Veit An Der Glan

HQ country

Austria

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Solar Module Sales: Sale of photovoltaic modules including standard modules, double-glass modules, power modules for special applications (high glare, snow loads, shade), and plug & play systems. Sold through certified partner network.
2. Inverter Sales: Sale of hybrid inverters for 3-phase systems (6-30 kW) and standard inverters (4-25 kW) with integrated battery management capabilities.
3. Battery Storage Systems: Sale of modular battery systems (12.4-29 kWh) and all-in-one AC storage systems (SKB-MAX up to 215 kWh) for residential and commercial applications.
4. Solar Thermal Products: Sale of solar thermal collectors including design flat-plate collectors (SKR500) and plug & flow module collectors (PFM series), along with hot water and buffer storage tanks.
5. Water Storage Systems: Sale of hot water storage (COMPACT 300-500L), buffer storage (COMFORT 800-1000L), and system storage (SONNENTANK 500-1500L) for solar thermal systems.
6. Professional Services: Training, technical support, and certification programs for installation partners. Includes webinars, technical training, and factory tours.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels11 records

Core offering

Sonnenkraft manufactures and sells integrated renewable energy system solutions: solar photovoltaic modules, building-integrated solar glass (BIPV), hybrid and standard inverters, modular battery storage systems, plug-and-play PV systems, solar thermal collectors, and water/buffer storage tanks. Products are manufactured in Austria and Germany and distributed exclusively through a certified partner network of installers, electricians, and wholesalers across 35+ countries.

Product overview

Sonnenkraft is an Austrian manufacturer offering integrated renewable energy system solutions. The product portfolio centers on three core technology pillars: (1) Photovoltaic systems comprising solar modules for various applications (standard, high-glare, alpine, shading-optimized), Sonnengläser BIPV glass products for facades/roofs/balconies, and hybrid/standard inverters; (2) Energy storage including modular battery systems (12-29 kWh), the SKB-MAX all-in-one AC storage (up to 215 kWh), and the award-winning Sonnenkraftwerk plug-and-play system; (3) Solar thermal solutions featuring design collectors (SKR500), PFM modular collectors, and comprehensive water storage tanks (300-1500L). The company provides complete system solutions from a single source, including solar modules, inverters, battery storage, and water heating/buffer storage, all manufactured in Austria.

Differentiator

Problem solved

Functional benefit

Brands

• SONNENKRAFTWERK: Plug & Play photovoltaic module with integrated micro-inverter for easy residential installation
• SONNENTANK
• SONNENGLÄSER
• SKB-MAX
• POWER Module
• POWER ALPIN
• POWER HC
• SKR500
• PFM

Products and services

• Solar Module (Standard) Bifacial solar modules with half-cell technology, available in 325-470 Wp power ratings and 35mm or 40mm frame heights, including glass-glass variants. Designed for standard rooftop PV installations on residential and commercial buildings. Sold through certified installation partners.
• Power Module (High Glare) High-performance solar modules designed for areas with high glare requirements, featuring 40mm frames and enhanced reflectivity resistance. For use near airports, roads, or other glare-sensitive environments. Sold through certified partners.
• Power Alpin Module Solar modules engineered for high snow load environments, featuring robust 40mm frames and enhanced structural durability for alpine conditions. Available in standard and terracotta-red variants for heritage applications.
• Power Maxim Module Specialized solar modules optimized for shaded installations, designed to maximize energy yield even under partial shading conditions.
• Sonnengläser BIPV (Roofing/Canopy) Building-integrated photovoltaic (BIPV) solar glass panels without frames, DIBt-approved for use as construction elements in roofing systems, carports, and canopy applications. Available in 200-360 Wp ratings.
• Sonnengläser BIPV (Facade) BIPV solar glass panels for building facades, available with or without frames, integrating photovoltaic technology into architectural elements. Reference: 1,000+ module facade installation delivering 265 kWp.
• Sonnengläser BIPV (Fence and Balcony Railing) Solar glass modules designed for fence and balcony railing applications, combining security/architectural barriers with energy generation.
• Hybrid Inverter (3-phase) Three-phase hybrid inverters (6-30 kW) with integrated battery management, supporting both grid-connected and emergency power operation. Available in SMART and Pro series (6, 8, 10, 12, 15, 20, 30 kW).
• Standard Inverter (3-phase) Three-phase standard inverters (4-25 kW) for grid-connected solar systems without battery storage capability.
• SONNENKRAFT Battery Storage System Modular lithium-ion battery storage systems with capacities from 12.44 to 29.03 kWh, plug & play installation, integrated emergency power function for blackouts, 10-year warranty, and remote monitoring via app and web portal. For residential and commercial energy storage.
• SKB-MAX All-in-One AC Storage All-in-one AC-coupled battery storage system with integrated inverter, available in capacities up to 215 kWh for large-scale commercial and industrial applications. Manufactured in Austria.
• SONNENKRAFTWERK Plug & Play PV System Award-winning plug-and-play photovoltaic system (300W and 400W) with integrated microinverter for residential balcony/terrace applications. Connects via Schuko or Wieland socket (RST20) for up to 2 modules, or to the distribution board for 3+ modules. Two modules generate approximately 570 kWh per year with a 6-7 year payback. Winner of the FUTUREZONE Award.
• Design Flat-Plate Collector SKR500 Premium design flat-plate solar thermal collector with integrated water reservoir design, combining aesthetic appeal with efficient solar heating. For residential and commercial solar thermal systems.
• PFM Modular Flat-Plate Collector Plug & flow modular flat-plate solar thermal collectors available in multiple sizes (2.01–3.31 m²) in PFM-S and PFM-W variants for residential and commercial solar heating systems.
• COMPACT Domestic Hot Water Storage Compact domestic hot water storage tanks (300–500 liters) with integrated heat exchangers for solar thermal systems.
• COMFORT Buffer System Storage Buffer storage tanks (800–1000 liters) for solar thermal and heating systems with multiple heating connections.
• SONNENTANK System Storage Large-capacity system storage tanks (500–1500 liters) with integrated heat exchangers for comprehensive solar thermal system integration. The most efficient energy storage system in the portfolio per Sonnenkraft.
• SONNENTANK PRO CLEAN Hygienic System Storage Hygienic system storage tanks (500–1000 liters) with special cleaning technology for optimal drinking water quality in solar thermal systems.

Quantifiable outcome

• Energy cost reduction of up to 75%
• +3 more outcomes

Named customers3 records

Segments5 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

Three partnerships are on record, tiered core and minor.

• KRANNICH SOLARcoreChannel Partner/ Reseller/ Distributor · 2 December 2025KRANNICH SOLAR is a distribution partner for Sonnenkraft products. Sonnenkraft presented at Solar-Update 2025 Switzerland and Batteriekongress 2025 Switzerland events organized with KRANNICH SOLAR.
• SmartFoxcoreStrategic or Co-development PartnerStrategic partnership announced: 'Zwei starke Partner für maximale Sonnenenergie: SONNENKRAFT & SMARTFOX'. The partnership combines both companies' strengths to offer customers holistic energy solutions that are efficient, intelligent, and sustainable.
• pixelkinder.comminorOthersWebdesign agency responsible for Sonnenkraft's website design and development.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• Enphase Energy: US-listed microinverter and home battery company rapidly expanding in Europe. Directly comparable to Sonnenkraft's SONNENKRAFTWERK plug-and-play and residential storage concept using modular, app-monitored systems.

Regional players

• Solarmax: Switzerland-based inverter manufacturer focused on string and hybrid inverters for residential and commercial PV. Comparable to Sonnenkraft's inverter range and DACH-region channel positioning.

Direct peers

• REC Group: Norwegian-headquartered solar module manufacturer with premium positioning and European/US distribution. Comparable as a regional module brand competing on quality and design versus commodity Asian supply.
• Krannich Solar: European PV distributor and wholesaler of modules, inverters and storage, also listed as a Sonnenkraft distribution partner. Comparable as a channel-driven solar distributor with overlapping product breadth and installer-centric GTM.
• Fronius International: Austrian-headquartered manufacturer of solar inverters, hybrid storage systems and energy management solutions. Closest geographic and product analog to Sonnenkraft, with overlapping channel-driven distribution across Europe and comparable residential/C&I solar offering.
• Solarwatt: German glass-glass solar module manufacturer with integrated storage and energy management offering. Comparable as a European premium PV brand with BIPV-adjacent glass-glass products and installer channels.
• Meyer Burger Technology: Swiss/German manufacturer of high-efficiency solar modules and cells with European production. Comparable as a 'Made-in-Europe' crystalline module maker seeking to differentiate against Asian commodity supply.
• IBC Solar: German PV system provider with modules, inverters, storage and a strong installer/distributor network across Europe. Directly comparable as a European full-stack solar company serving residential and commercial customers via a channel model.

Broad incumbents

• SMA Solar Technology: Germany's largest inverter manufacturer with a broad residential, commercial and utility-scale portfolio. Overlaps with Sonnenkraft on inverters and storage integration, but operates at significantly greater scale and global reach.
• SolarEdge Technologies: Global inverter and power-optimizer company with growing residential storage offering. Comparable as an inverter-led system player competing for the same European installer channel.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/intent/tweet?url=https%3A%2F%2Fwww.sonnenkraft.com
• YouTubeyoutube.com/channel/UCcCNGlIP9t2C90XbUqC1veA
• Facebookfacebook.com/Sonnenkraft
• LinkedInlinkedin.com/company/sonnenkraft
• Instagraminstagram.com/sonnenkraftaustria

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

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 Sonnenkraft