Solarstone

What Solarstone does

Solarstone OÜ is an Estonian manufacturer of building-integrated photovoltaic (BIPV) solar roofing systems in which solar modules replace conventional roofing materials, serving concurrently as weatherproof envelope and electricity-generating surface. Founded in 2015 in Viljandi, Estonia, the company operates what it describes as Europe's largest BIPV production facility by capacity, assembling up to 13,000 integrated solar modules per month on automated KUKA KR 120 robotic lines. Its product portfolio comprises three hardware systems—Solar Full Roof™ (full-size integrated panels rated 430 Wp peak), Solar Tiled Roof™ (modules compatible with 18+ European tile profiles), and Solar Power Set™ (pre-configured kits in 5.16/6.88/8.60 kWp sizes)—plus supporting software: Smart Roof Planner™ cloud design and pricing tool and BIM families for Autodesk Revit.

Solarstone sells exclusively through a tiered certified partner network rather than direct-to-consumer e-commerce: Master Roofers install using familiar methods, Full-Service Partners deliver turnkey projects, Sales Engineers specify projects for mid-market buyers, and Referral Partners (architects, developers) feed the funnel. Pricing is quote-based and project-specific. End customers split across three segments—individual homeowners (residential new-build and renovation), architects and developers (design-stage integration for ESG and NZEB compliance), and roofing companies expanding service offerings—each addressed by distinct channel tiers.

The company has completed over 2,500 installations across 10 European markets (Estonia, Sweden, Norway, Germany, Slovakia, Finland, Croatia, Switzerland, and others) and holds the major European certifications (TÜV Rheinland, Kiwa, RISE, ISO 9001, ISO 14001, EN IEC 61730/61215, EN 13501-2018 Broof t1/t2, CEN/TR 15601 Class B). In March 2024, Biofuel OÜ—the family office of Raul Kirjanen (Graanul Invest)—acquired majority ownership, and the three founders stepped down. Headcount stands at approximately 50 employees. Operations are run from Tallinn (HQ), Viljandi (factory), and a German subsidiary (Solarstone Deutschland GmbH, Hilden).

Name

Solarstone

Legal name

Solarstone OÜ

Website

https://solarstone.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

11–50 employees

Short description

Solarstone is an Estonian manufacturer of building-integrated photovoltaic (BIPV) solar roofing systems, producing Solar Full Roof, Solar Tiled Roof, and Solar Power Set products sold through certified installer partners across 10 European markets.

Ownership category

akta.pro rank

Product category

Building-Integrated Photovoltaics (BIPV) Solar Roofing

NAICS

Roofing Contractors (23816)

akta.pro primary industry

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

akta.pro secondary industries

Solar PV Module Manufacturing (Cells, Modules, Thin-Film) (EUAMABAD), Solar Design, Engineering & Performance Software (PV Modeling, Digital Twins, Monitoring) (EUAMABAH)

Keywords

• Building-integrated photovoltaics
• Solar roofing systems
• BIPV manufacturing
• Integrated solar panels
• Photovoltaic roof tiles

Headquarters

HQ city

Viljandi

HQ country

Estonia

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. BIPV Solar Roof Systems: Sale of integrated solar roofing products including Solar Full Roof™, Solar Tiled Roof™, and Solar Power Set™. These are one-time hardware and system sales where customers purchase complete roofing systems that combine roofing materials with solar energy generation. Revenue is generated from product sales, not ongoing subscriptions.
2. Professional Services through Partners: Solarstone's certified partner network (roofing companies, electricians) provides installation services. While these are separate business relationships, the company supports the ecosystem that generates additional service revenue related to their products.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels7 records

Core offering

Solarstone develops and manufactures building-integrated photovoltaic (BIPV) solar roofing systems where solar modules replace traditional roofing materials, combining weather protection, energy generation, and architectural design in a single integrated solution. The company sells its products through a certified installer partner network across European markets and operates Europe's largest BIPV production facility in Viljandi, Estonia.

Product overview

Solarstone offers a unified portfolio of building-integrated photovoltaic (BIPV) solar roofing products. The core offerings include Solar Full Roof™ (full-size building-integrated solar panels replacing the entire roof), Solar Tiled Roof™ (solar modules integrating with traditional roof tiles), and Solar Power Set™ (standardized pre-packaged BIPV kits in three sizes). Supporting the product line are Smart Roof Planner™ (design and pricing software) and BIM Models for Autodesk Revit (architectural planning tools). Together, these products form an integrated system where structure, waterproofing, and energy production work as one cohesive roofing solution.

Differentiator

Problem solved

Functional benefit

Brands

• Solar Full Roof™: Building-integrated solar panels that cover the entire roof surface, combining roofing and energy generation in one solution
• Solar Tiled Roof™
• Solar Power Set™
• Smart Roof Planner™
• Solar Carport

Products and services

• Solar Full Roof™ Building-integrated solar panels that cover the entire roof surface, serving as both the weatherproof roof covering and electricity-generating surface. Uses patented mounting system without roof-penetrating mounts, with glass-glass module construction rated at 430 Wp peak power, 551 kg/m² snow load capacity, and 110 m/s wind uplift resistance. Includes 30-year performance warranty and 20-year product warranty. Designed for homeowners, architects, and developers seeking a complete solar roof solution for Nordic climates.
• Solar Tiled Roof™ Solar modules that integrate seamlessly with traditional roof tiles, maintaining the building's original architectural character. Compatible with 18+ roof tile profiles from leading European manufacturers including BMI Monier, Wienerberger, and Benders. Generates 185 Wp/m² with 25-year warranty. Designed for buildings where preservation of traditional tile aesthetics is required while still integrating solar power generation.
• Solar Power Set™ Pre-configured BIPV kit delivered on a single pallet with all components for fast installation on tile and metal roofs. Available in three standardized sizes: Small 5.16 kWp, Medium 6.88 kWp, and Large 8.60 kWp. Includes 20-year product warranty and 30-year performance warranty. Designed for quick and straightforward installation by certified roofing partners.
• Smart Roof Planner™ Cloud-based roof planning software that converts sketches, CAD files, or PDF drawings into complete roof projects within minutes, including 3D visualizations, layouts, material lists, pricing, and installation documentation. Designed specifically for roofing contractors and integrates Solar Full Roof, Solar Tiled Roof, Solar Power Set, and traditional roofing systems within a single workflow.
• BIM Models for Autodesk Revit Building Information Modeling components for Autodesk Revit that integrate solar roofs into architectural design workflows. Includes predefined roof grids, module kits, and intelligent families for accurate placement, automatic calculations, and coordinated documentation. Designed for architects and designers to integrate solar roof systems into building projects from the earliest planning stages.

Quantifiable outcome

• Reduce household electricity costs by generating power on-site, decreasing grid purchase requirements
• +3 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature5 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Swedala Tak (Sweden)coreChannel Partner/ Reseller/ DistributorNationwide roofing company with teams across Sweden. New partner for Solarstone, representing market expansion. First project completed for private home with Solar Full Roof. Part of 31 Swedish partners in installer network.
• AluFrameless (Switzerland)coreChannel Partner/ Reseller/ DistributorSwiss partner that installed Solar Full Roof on private home in Switzerland, designed to meet high energy demands including EV charging and pool systems.
• Solintegra (Norway)coreChannel Partner/ Reseller/ DistributorNorwegian partner in Solarstone's network. Collaborated on Solar Tiled Roof installation in Stavanger, Norway along with Byggmester Bob and Svithun Elektro.
• Estonian Academy of MotorcyclingminorStrategic or Co-development PartnerPartnership to introduce electric motorcycles (Husqvarna EE-5) for children's beginner level training, promoting eco-friendly motorsport practices. Aligns with Solarstone's sustainability mission.
• TÜV RheinlandcoreTechnology or IntegrationLeading European testing and certification body that independently tested and certified Solar Full Roof for electrical safety, structural performance, fire resistance, weather protection, and long-term durability.
• KiwacoreTechnology or IntegrationEuropean testing and certification organization. Conducted ISO 9001:2015 (Quality Management) and ISO 14001:2015 (Environmental Management) certifications for Solarstone.
• RISEcoreTechnology or IntegrationSwedish research institute and testing body that certified Solar Full Roof system as part of European certification process.
• SolarideminorStrategic or Co-development PartnerSolarstone has supported the Solaride solar car project for four consecutive seasons since 2020. Partnership enables TalTech university students to participate in international solar competitions and develop expertise.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Others

• Trina Solar: Trina Solar is a global top-tier PV module supplier launching BIPV/rooftop integrated solutions; while still primarily a module manufacturer rather than a roofing-systems player, Trina's vertical integration toward rooftop energy systems makes it an adjacent competitor with overwhelming supply-chain scale.

Direct peers

• SunTegra: US-based SunTegra produces integrated solar roofing products (Solar Tile and Solar Shingle) that mount into the roof deck like Solarstone, competing in the BIPV shingle/tile category for homeowners seeking aesthetic solar roofing.
• GAF Energy (Standard Industries): GAF Energy's Timberline Solar is an integrated solar roofing shingle launched in the US and announced for expansion into Europe, directly competing with Solarstone's Solar Tiled Roof in the building-integrated aesthetic solar tile category with similar installer-channel distribution.
• Tesla (Solar Roof): Tesla's Solar Roof is a building-integrated PV roofing system targeting homeowners with aesthetic, all-in-one solar roofing; it is Solarstone's most comparable global product in technology (BIPV tiles/panels), customer (homeowners), and category (replacement roof that also generates power).
• Viridian Solar: UK-based Viridian Solar develops roof-integrated solar tile systems that replace conventional roof tiles, closely mirroring Solarstone's Solar Tiled Roof concept for the European residential new-build and re-roof market.

Emerging players

• Meyer Burger Technology: Meyer Burger is a European-headquartered PV manufacturer developing integrated solar roofing solutions (e.g., Meyer Burger Tile) and premium PV modules, emerging as a direct BIPV competitor with established European manufacturing and distribution reach.
• SunRoof: Swedish/Nordic-headquartered SunRoof produces integrated solar roof systems with full-roof BIPV and energy storage, directly competing with Solarstone in the Swedish/Nordic residential market using the same architectural aesthetic-solar approach.

Broad incumbents

• CertainTeed (Saint-Gobain): CertainTeed is a major North American roofing manufacturer that has launched solar-integrated roofing products; as a Saint-Gobain-owned established roofing incumbent with deep distribution, it represents the larger building-products player entering BIPV, comparable to where Solarstone competes in the integrated roofing category.
• Hanwha Qcells: Hanwha Qcells is one of the world's largest PV module manufacturers with growing BIPV/tile offerings and a full European sales footprint; its scale and module economics make it a broader incumbent that could encroach on Solarstone's BIPV-roof market as it expands into integrated solutions.
• BMI Group (acquired by Standard Industries / Braas Monier): BMI Group is a large European roofing manufacturer (including brands like Braas, Icopal, Monier) increasingly integrating PV into roofing portfolios; Solarstone lists BMI Monier as a tile-compatibility partner, making BMI a broad incumbent both partner and adjacent competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@solarstoneenergy
• LinkedInlinkedin.com/company/solarstone

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Funding overview

Funding rounds2 records

Investors1 record

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 Solarstone