Der Solarteur

What Der Solarteur does

Der Solarteur GmbH is a Dortmund-based Meisterbetrieb (master craft business) that delivers turnkey photovoltaic installations for residential and commercial customers across the Ruhr area in North Rhine-Westphalia, Germany. The company combines in-house Dachdeckermeister (master roofing) and Elektromeister (master electrical) capabilities, enabling it to execute the full project lifecycle — consultation, planning, mounting, electrical connection, and after-sales service — without subcontracting the core trades. Core products include PV module arrays (e.g., Longi LR5-54HIH 405–410 Wp) paired with Huawei SUN2000 inverters, plus modular add-ons: battery storage (Stromspeicher), wallboxes for EV charging, heat pumps (Wärmepumpe), and smart-home energy management. Residential systems typically range from 5–10 kWp with documented autarky outcomes of 67–80%, while commercial projects range up to 200 kWp (e.g., the AWO Witten installation).

The business operates a sales-led GTM combining a self-serve online solar calculator and inquiry forms with on-site consultations and field-based sales staff. Distribution is anchored by an official installation partnership with DEW21 (the Dortmund municipal utility), which has generated more than 200 residential referrals, supplemented by referral relationships with Stadtwerke Bochum, Schwerte, and Haltern am See, and a dedicated commercial/industrial motion supported by freelance commercial agents (freie Handelsvertreter) and project case studies (Moritz Fiege brewery, AWO, automotive dealerships). The company is part of the Solar Ruhr Gruppe corporate ecosystem and sources components through a logistics partnership with PVI, which maintains a fully stocked in-house warehouse for immediate material availability.

Revenue is generated as one-time project fees on individually quoted installations, with a deposit required upon contract acceptance and the balance invoiced after installation or commissioning. Aftermarket and add-on services (additional modules, storage, wallbox, heat pump, maintenance) provide incremental revenue from the existing customer base. Managing Directors Salvatore Prestipino and Thomas Sontowski lead a team of more than 40 colleagues, including master craftspeople and trained journeymen, headquartered at Steinhammerstraße 86A, 44379 Dortmund, with the registered office at Am Kai 22, 44263 Dortmund (HRB 33355).

Name

Der Solarteur

Legal name

Der Solarteur GmbH

Website

https://der-solarteur.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Der Solarteur is a Dortmund-based Meisterbetrieb delivering turnkey photovoltaic systems, battery storage, heat pumps, and EV wallboxes to residential and commercial customers across the Ruhr area in North Rhine-Westphalia, Germany.

Ownership category

akta.pro rank

Product category

Solar Installation Services

NAICS

Roofing Contractors (238160)

akta.pro primary industry

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)

akta.pro secondary industries

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO), Solar Panel Cleaning (HSAEAJAL)

Keywords

• Photovoltaic installation
• Solar energy systems
• Heat pump installation
• Battery storage solutions
• EV charging installation

Headquarters

HQ city

Dortmund

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure

Revenue model

1. PV system sale and installation (B2C & B2B): Der Solarteur sells and installs complete photovoltaic systems (modules, inverters, storage, wallboxes, heat pumps) as a one-time turnkey service to both residential homeowners and commercial/industrial customers. Pricing is quoted individually per project. The company sources components directly from manufacturers via its logistics partner PVI and performs all installation work (roofing and electrical) with its own staff. Revenue is generated as a one-time project fee, with a deposit upon order acceptance and the balance invoiced after installation or commissioning.
2. Aftermarket / add-on services (storage, wallbox, heat pump, service): Existing customers can expand their installations with additional components (more modules, storage, wallbox, heat pump) or purchase maintenance and support services. This provides recurring revenue from the existing customer base.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Der Solarteur is a Dortmund-based Meisterbetrieb (master craft business) that designs, sells, and installs photovoltaic (PV) systems for residential and commercial customers. Bundled offerings include battery storage, heat pumps, wallboxes (EV chargers), and smart-home integration, delivered as a single-source solution combining roofing, electrical, and solar trades. The company also provides maintenance services and operates an in-house warehouse to shorten installation lead times.

Product overview

Der Solarteur is a full-service provider of turnkey photovoltaic systems and renewable energy solutions based in Dortmund, Germany. The core offering consists of PV system installation for residential and commercial customers, with modular add-ons including battery storage (Stromspeicher), heat pumps (Wärmepumpe), wallboxes for electric vehicles, and smart home integration. The company provides an online solar calculator tool and request forms for generating personalized offers. As part of the Solar Ruhr Gruppe, materials are sourced through partner PVI, and the company collaborates with regional utilities including DEW21 for customer acquisition. Services span consultation, planning, installation, and ongoing maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Photovoltaik-Anlage (PV system) Design, supply, and installation of rooftop photovoltaic (PV) systems for residential and commercial customers, using modules from Longi and inverters from Huawei. Reduces customer electricity costs and supports energy independence.
• Stromspeicher (Battery storage) Installation of battery storage systems (e.g., E3/DC) to store excess PV generation for later use, increasing self-consumption and energy independence for residential and commercial customers.
• Wärmepumpe (Heat pump) Installation of heat pumps integrated with PV systems, enabling homeowners and businesses to use self-generated solar electricity for heating and reducing reliance on fossil fuels.
• Wallbox (EV charging station) Installation of wallbox EV charging stations for residential and commercial customers, often integrated with PV systems to charge electric vehicles using self-generated solar electricity.
• Wartung & Service (Maintenance and Service) Ongoing maintenance and service for installed PV systems, battery storage, wallboxes, and heat pumps to ensure long-term performance and reliability for residential and commercial customers.

Quantifiable outcome

• Residential autarky rates of 67–80% achievable with PV + storage + wallbox combinations
• +4 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Six partnerships are on record, tiered core and minor.

• DEW21 (Dortmunder Energie- und Wasserversorgung GmbH)coreStrategic or Co-development PartnerDer Solarteur is an official partner (offizieller Partner) of DEW21, the municipal energy and water utility of Dortmund. The partnership has yielded over 200 jointly installed solar systems. DEW21 refers its customers to Der Solarteur for PV installation, and the partnership serves as a core channel for residential customer acquisition in Dortmund.
• PVI (Photovoltaik International)coreTechnology or IntegrationPVI is Der Solarteur's materials and logistics partner, sourcing components (modules, inverters, storage) in large volumes directly from manufacturers. PVI stocks Der Solarteur's warehouse, ensuring immediate availability of all parts and eliminating supply chain delays.
• Stadtwerke BochumminorGTM or Marketing PartnerStadtwerke Bochum is listed as one of Der Solarteur's partners on the website's partner logos section. The nature of the relationship appears to be referral/marketing-oriented, with Stadtwerke Bochum potentially recommending Der Solarteur to its customers for solar installations.
• Stadtwerke SchwerteminorGTM or Marketing PartnerStadtwerke Schwerte is listed as one of Der Solarteur's partners on the website's partner logos section.
• Stadtwerke Haltern am SeeminorGTM or Marketing PartnerStadtwerke Haltern am See is listed as one of Der Solarteur's partners on the website's partner logos section.
• BürgerEnergieGenossenschaft-58 (BEG-58)coreStrategic or Co-development PartnerBEG-58 (BürgerEnergieGenossenschaft-58) is a citizen energy cooperative that commissions PV installations on behalf of community facilities. Der Solarteur has worked with BEG-58 on multiple large projects including AWO Witten (200 kWp) and AWO Hemer. BEG-58 acts as the project developer/financier while Der Solarteur serves as the installation partner.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Others

• Viessmann: German heating and heat pump manufacturer with a strong installer network across Germany. Relevant adjacent peer given Der Solarteur's heat-pump upsell alongside PV installations.
• Sonnen (sonnen GmbH): German residential battery storage provider (owned by Shell) supplying integrated PV-storage solutions. Comparable to Der Solarteur's battery-storage add-on offering and a potential supplier or competitor depending on configuration.

Direct peers

• Solarwatt: German manufacturer of PV modules and glass-glass solar systems with an installer network across Germany. Comparable in offering end-to-end PV plus storage solutions to residential and commercial customers via certified installation partners.
• Enerix: German regional franchise network of solar installers specializing in rooftop PV, storage and heat pumps. Closely comparable to Der Solarteur in offering turnkey residential and commercial solar across multiple German regions.
• Enpal: German solar leasing and installation provider offering PV, battery storage, heat pumps and wallboxes to homeowners. Competes head-to-head with Der Solarteur for residential rooftop solar projects in Germany, with a digital-first, larger-scale operating model.
• 1Komma5°: Fast-growing German full-service residential and commercial solar installer (PV, storage, heat pumps, wallbox, e-mobility). Operates a similar turnkey craft/in-house installation model and is a direct competitor for the same German homeowner and C&I customer base.

Emerging players

• Zolar: Online solar platform in Germany that connects homeowners with regional installers and provides solar calculators, planning and financing. Overlaps with Der Solarteur's web-based solar calculator lead-gen and installer-matching approach.

Broad incumbents

• EnBW: Major German energy supplier offering solar, heat pumps and EV charging solutions to residential and commercial customers through its own brand and partnerships. Competes with Der Solarteur in the same German rooftops and electrification segments.
• IBC Solar: Established German PV wholesaler and project developer with EPC capabilities for residential, commercial and utility-scale solar. Overlaps with Der Solarteur on commercial rooftop EPC and component supply, though at a much larger scale.
• E.ON Solar: Large German utility offering rooftop solar, storage, heat pumps and wallboxes to residential and commercial customers. Competes for the same end customers through a broader portfolio and could pose a threat via municipal-utility channels.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/der-solarteur-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Der Solarteur