ADLER Solar

What ADLER Solar does

ADLER Solar GmbH is a Bremen-based Meisterbetrieb (master craftsman business) founded in April 2008 by Gerhard Cunze, operating as a full-service provider of photovoltaic systems, battery storage, heat pumps, EV charging infrastructure, and emergency power solutions for residential and commercial customers across Northwest Germany. The company originated as a Europe-wide PV module service provider — performing decommissioning, quality management, and damage assessments, with proprietary methods including the Crack-Age-Test and one of the earliest electroluminescence QA procedures for installed PV modules — before pivoting in 2017 to new plant construction. The technical stack combines Sigenergy SigenStor batteries (5-48 kWh, up to 10,000 charge cycles), Sigenergy hybrid inverters (5-20 kW), and a Gateway for intelligent energy and emergency power management, integrated with clever-pv optimization software and inverters from GoodWe and Huawei.

The business runs on a project-based revenue model: quote-driven one-time installation sales for residential and commercial PV, storage, heat pump, and wallbox deployments, supplemented by professional-services recurring revenue from maintenance, repowering of legacy systems, and operation management and monitoring of large commercial PV plants. Pricing is not publicly disclosed but typical residential system ticket sizes range from EUR 9,000 to EUR 22,000, with self-consumption rates of 60-90% achievable when PV is paired with storage, heat pumps, and EV chargers. ADLER Solar employs approximately 100 staff across locations in Bremen, Eschwege, Oldenburg, and Rotenburg (Wümme), and distributes through its own showroom, field sales engineers, an inside-sales team, a website lead-generation funnel, regional events, and multi-channel digital marketing. The company is owner-operated, with no disclosed external equity backing; it holds historical joint-venture interests in pvXchange Trading GmbH and ADLER Solar Works (Yokohama, Japan).

Name

ADLER Solar

Legal name

ADLER Solar GmbH

Website

https://adlersolar.de

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

51–100 employees

Short description

ADLER Solar is a Bremen-based Meisterbetrieb founded in 2008 that designs, installs, and services photovoltaic systems, battery storage, heat pumps, and EV charging infrastructure for residential and commercial customers across Northwest Germany.

Ownership category

akta.pro rank

Product category

Solar Energy Installation Services

NAICS

Solar Electric Power Generation (221114)

SIC

Electrical Work (1731)

akta.pro primary industry

Renewable Energy Industrial Facilities Construction (Solar, Wind, Storage) (IMAFADAD)

akta.pro secondary industries

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO), PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations) (EUACAGAC), Solar Mounting, Racking & Trackers (Fixed-Tilt, Single/Dual-Axis, Rooftop Mounts) (EUAMABAF)

Keywords

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

Headquarters

HQ city

Bremen

HQ country

Germany

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Photovoltaic (PV) system sales and installation: Complete PV system sales and installation for residential and commercial buildings, including planning, mounting, and commissioning.
2. Battery storage systems: Sale and installation of battery storage systems (SigenStor and other brands) for residential and commercial energy storage.
3. Heat pump systems: Heat pump sales and installation for efficient and sustainable building heating, often combined with PV systems.
4. EV charging infrastructure (Wallbox): Sale and installation of wallboxes and charging infrastructure for electric vehicles, combinable with PV systems for self-generated solar charging.
5. Repowering services: Modernization of existing PV installations to improve yields and extend operational lifespan for older systems.
6. Operation management and monitoring: Ongoing monitoring, maintenance, and operation management services for large PV installations for commercial customers.
7. Maintenance services: Maintenance services for solar installations including inspections, repairs, and performance optimization.

Pricing tiers

Go-to-market motion2 records

Distribution channels6 records

Marketing channels14 records

Core offering

ADLER Solar is a regional Meisterbetrieb (master craftsman business) that plans, sells, and installs photovoltaic (PV) systems for residential and commercial customers across Northern Germany. Offerings center on PV systems complemented by battery storage (notably Sigenergy SigenStor), heat pumps, wallbox EV charging, and emergency power backup, with full-service delivery covering consultation, planning, installation, commissioning, maintenance, and repowering.

Product overview

ADLER Solar is a Meisterbetrieb (master craftsman business) founded in 2008, offering comprehensive energy solutions centered on photovoltaic systems for residential and commercial customers in northern Germany. The core product portfolio centers on PV systems with complementary modules including batteries, heat pumps, wallboxes, and emergency power systems. The product line features Sigenergy-branded components (SigenStor batteries with 5-48 kWh capacity, hybrid inverters rated 5-20 kW, and the Sigenergy Gateway for system integration), which integrate with the clever-pv optimization software. Services encompass installation, maintenance, repowering of older systems, commercial charging infrastructure, and operational management of large-scale PV plants. The company positions itself as a full-service provider from consultation through installation and ongoing support.

Differentiator

Problem solved

Functional benefit

Products and services

• Photovoltaic (PV) Systems
• Heat Pump Systems (Wärmepumpe) Heat pump systems for efficient and sustainable building heating, combinable with photovoltaic installations to maximize self-consumption of self-generated solar energy.
• Battery Storage Systems (Batteriespeicher) Battery storage systems for storing excess solar power generated during the day for use during evening hours, increasing self-consumption rates up to 60-90%.
• Wallbox (EV Charging Station) Electric vehicle charging stations for home use, enabling charging of EVs using self-generated solar power from the PV system.
• Emergency Power Systems (Notstrom) Emergency backup power systems that maintain electricity supply during grid outages using battery storage technology, with automatic activation upon grid failure detection.
• Sigenergy SigenStor Battery Systems Sigenergy SigenStor battery storage systems with capacities from 5 kWh to 48 kWh, featuring intelligent battery management system (BMS) with up to 10,000 charging cycles and approximately 10-15 year lifespan.
• Sigenergy Hybrid Inverters Hybrid inverters that convert DC from solar modules to AC for household use while enabling battery storage integration, with power ratings from 5 kW to 20 kW combining normal inverter and battery inverter functions in one device.
• Sigenergy Gateway Energy Management Controller Central control unit that connects all solar system components for intelligent energy management, monitoring, and optimization of energy flows, with Smart Home integration and dynamic electricity tariff support.
• clever-pv Optimization Software Software solution for maximizing solar system energy yields through real-time data analysis and intelligent algorithms, integrating with Huawei, GoodWe, and Sigenergy products.
• Repowering Service Modernization service for existing older photovoltaic systems to improve performance and extend operational lifespan.
• Maintenance and Service (Wartung & Service) Ongoing maintenance and service for photovoltaic installations to ensure optimal performance and longevity, including inspections, repairs, and performance optimization.
• Operation Management and Monitoring (Betriebsführung) Operational management and monitoring services for large-scale commercial photovoltaic installations, providing ongoing oversight, performance tracking, and issue resolution.
• Commercial Charging Infrastructure (Ladeinfrastruktur für Unternehmen) Commercial charging infrastructure solutions including wallboxes, fast chargers, and load management systems for employees, fleets, and customers at commercial sites.
• PV Financing (Finanzierung) Financing options for photovoltaic installations provided through partner relationships.

Quantifiable outcome

• Self-consumption rates of 60-90% achievable with PV storage and additional consumers (heat pumps, wallboxes)
• +3 more outcomes

Named customers1 record

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature8 records

Partnerships

14 partnerships are on record, tiered core, major and minor.

• Bundesverband des Solarhandwerks (BDSH)coreStrategic or Co-development Partner · 1 January 2021ADLER Solar is a founding member of BDSH, the German federal association of solar trade. This partnership demonstrates the company's commitment to professional standards and industry leadership in the solar installation sector.
• GoodWecoreStrategic or Co-development PartnerSince 2019, ADLER Solar has been a partner in the after-sales services sector for GoodWe, a major inverter manufacturer. The partnership was established following GoodWe's strategic partnership with pvXchange, the world's largest trading platform for PV modules and components.
• pvXchange Trading GmbHmajorStrategic or Co-development PartnerFollowing the 2014 strategic partnership with pvXchange, ADLER Solar participated in the brand's restart through founding pvXchange Trading GmbH together with platform co-founder Martin Schachinger in 2015.
• SigenergycoreTechnology or IntegrationADLER Solar offers Sigenergy products including SigenStor batteries (5-48 kWh), hybrid inverters (5-20 kW), and the Sigenergy Gateway for intelligent energy management and emergency power solutions.
• clever-pvcoreTechnology or IntegrationSoftware partnership offering clever-pv optimization software that maximizes energy yields of solar systems through real-time data analysis, working with Huawei, GoodWe, and Sigenergy products.
• HuaweicoreTechnology or IntegrationIntegration partnership with Huawei for energy management solutions, working with clever-pv optimization software for solar system performance maximization.
• Stadtwerke RotenburgminorStrategic or Co-development PartnerPartnership with Stadtwerke Rotenburg (municipal utility) for heat pump solutions and regional energy services.
• I|2|B - IDEA TO BUSINESSminorGTM or Marketing PartnerPartnership with I|2|B for business development and idea-to-business consulting services.
• #machWatt (Solar campaign)minorGTM or Marketing PartnerParticipation in the #machWatt solar campaign, a public awareness initiative. ADLER Solar participates in events like Nachhaltigkeitsmarkt where the Solarkampagne #machWatt and Verbraucherzentrale Bremen energy consulting are present.
• Verbraucherzentrale BremenminorGTM or Marketing PartnerCollaboration with Verbraucherzentrale Bremen for energy consulting at public events, providing consumers with professional energy advice.
• Heidelberger BallschuleminorGTM or Marketing PartnerSponsorship partnership with Heidelberger Ballschule, a sports education program.
• ATSV HabenhausenminorGTM or Marketing PartnerSports sponsorship partnership with ATSV Habenhausen local sports club.
• Umwelt Unternehmen BremenminorGTM or Marketing PartnerPartnership with the Umwelt Unternehmen Bremen environmental business initiative, demonstrating commitment to sustainability.
• Energie ExpertenminorGTM or Marketing PartnerPartnership with Energie Experten network for energy efficiency consulting and professional services.

Scale indicators11 records

Recent moves14 records

Expansion highlights6 records

Direct peers

• Enerix: German regional solar installer franchise with local Meisterbetrieb partners across Germany. Closely comparable business model (regional PV + storage installation) directly contesting ADLER Solar's Northwest Germany footprint.
• Enpal: Berlin-based solar leasing and holistic home energy provider offering PV, storage, heat pumps, and wallboxes to German homeowners. Competes for the same residential customer with a financing-driven, digital-first model.
• 1Komma5°: German energy company offering holistic residential energy solutions including PV, battery storage, heat pumps, and EV charging — directly overlapping ADLER Solar's core bundle but at national scale with venture backing.
• Solarwatt: Dresden-based German manufacturer and installer of solar systems, battery storage, and energy management. Comparable product mix (PV modules + storage + smart energy management) and overlapping customer base in Germany.
• Zolar: Online solar platform connecting German homeowners with regional installation partners for PV, storage, and heat pumps. Comparable end-customer offering and target market; differs via marketplace model rather than owned installers.
• IBC Solar: German PV system provider and EPC active in residential, commercial, and utility-scale solar. Comparable photovoltaic systems offering and installer network serving German end customers.

Broad incumbents

• Viessmann: German heating and climate technology manufacturer that has expanded into PV, battery storage, and holistic energy solutions. Competes with ADLER Solar on the heat-pump-plus-PV bundle within a much broader HVAC portfolio.
• E.ON: Major European utility offering residential and commercial solar solutions as part of a broad energy portfolio. Larger incumbent serving German customers with PV, storage, and EV charging products that overlap ADLER Solar's bundle.

Others

• SMA Solar Technology: German inverter and energy management technology supplier to solar installers including ADLER Solar. Adjacent ecosystem participant — not a direct competitor but a critical technology partner in ADLER Solar's product stack.

Emerging players

• BELECTRIC: European EPC focused on utility-scale solar and storage projects. Partial overlap with ADLER Solar's commercial operation management and repowering capabilities, though focused on large-scale rather than residential.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/adlersolar
• Facebookfacebook.com/adlersolar.de
• LinkedInlinkedin.com/company/adler-solar
• Instagraminstagram.com/adlersolar
• YouTubeyoutube.com/@adlersolar

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries2 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 ADLER Solar