Unterholzner Photovoltaik Service

What Unterholzner Photovoltaik Service does

Unterholzner Photovoltaik Service GmbH & Co. KG is a family-owned German photovoltaic and energy-solutions installer founded in 1994 and headquartered in Marklkofen, Bavaria (registered office Landshut), operating under the trade name 'Unterholzner Energielösungen.' The company plans, installs, maintains and services PV systems for residential homeowners and commercial/industrial customers across Bavaria and Saxony, and also delivers battery storage (sourced from Fenecon), EV charging infrastructure (as an authorized Webasto Service Partner), proprietary load-management hardware/software (PeakSizer), and energy-management consulting aligned to DIN EN 16247 and ISO 50001. Its technical platform stack includes the proprietary PV-Control monitoring and ranking system (365-day automated fault detection) and the PV-Check online calculator used as a self-service lead-generation tool, with supporting inspection capabilities such as aerial thermography and MBJ electroluminescence module testing.

The business model is predominantly project-based and one-time in nature: revenue is generated at installation for the sale and commissioning of PV systems, battery storage, wallboxes, and PeakSizer deployments, with a thinner recurring tail from maintenance, monitoring, cleaning, and energy-management consulting services. Customers are served through a direct field-sales motion covering two German states, with reference customers spanning small-to-mid-sized commercial projects (e.g., PV-Park Bruck) and residential homeowners, plus an investor/pacht model for third-party-owned systems. The cumulative installed base of 300 MW is stated as sufficient to power approximately 75,000 households for one year, and the company reports more than 20 employees.

Ownership and structure are tightly held: Unterholzner Photovoltaik Service GmbH & Co. KG is a German limited partnership whose general partner is Hieber Holding GmbH, with Benjamin Hieber serving as managing director. No external investors, private equity or venture capital ownership is disclosed, and no funding rounds, acquisitions, or restructuring events appear in the available record. The supply chain is anchored by named German suppliers (Fenecon, Kaco, Heckert Solar, K2 Systems, Solar-Log, KBE Berlin, Multi-Contact) and the Japanese module brand Sharp, reflecting a deliberate 'Made in Germany' positioning for hardware components.

Name

Unterholzner Photovoltaik Service

Legal name

Unterholzner Photovoltaik Service GmbH & Co. KG

Website

https://unterholzner-service.de

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

1–10 employees

Short description

Unterholzner Photovoltaik Service GmbH & Co. KG is a family-owned German installer (founded 1994, Bavaria) that plans, installs, and services photovoltaic systems, battery storage, EV charging, proprietary PeakSizer load management, and energy management consulting for residential and commercial customers across Bavaria and Saxony.

Ownership category

akta.pro rank

Product category

Photovoltaic Installation Services

NAICS

Roofing Contractors (23816)

akta.pro primary industry

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

akta.pro secondary industry

Solar Panel Cleaning (HSAEAJAL)

Keywords

• Photovoltaic installation services
• Battery storage systems
• EV charging infrastructure
• Load management solutions
• Commercial solar energy

Headquarters

HQ city

Marklkofen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Photovoltaik system sales and installation: Sale and installation of complete photovoltaic systems for residential and commercial customers. Revenue is project-based and one-time at installation. Includes new systems, repowering, and investor models.
2. Batteriespeicher sales and installation: Sale and installation of battery storage systems to increase self-consumption of solar power, reduce grid dependency, and lower electricity costs.
3. Ladeinfrastruktur (EV charging): Sale and installation of wallboxes and charging infrastructure for homes and businesses, including company fleet solutions.
4. Lastmanagement (PeakSizer product): Load management product and service for commercial customers to reduce peak electricity consumption and grid charges.
5. Wartung, Service & Monitoring: Ongoing maintenance, inspection, repair, cleaning, and monitoring services for PV installations. May generate recurring service contract revenue.
6. Energiemanagement consulting: Energy management consulting for commercial clients including energy audits, CO2 reduction programs, measurement concepts, and peak-shaving strategies.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Unterholzner plans, installs, and services photovoltaic systems for residential and commercial customers across Bavaria and Saxony, complemented by battery storage, EV charging infrastructure (wallboxes and fast chargers), and the proprietary PeakSizer load management product. The company also delivers ongoing maintenance, monitoring via its in-house PV-Control platform, thermography inspections, module testing, and commercial energy management consulting.

Product overview

Unterholzner Photovoltaik Service is a renewable energy solutions provider offering an integrated portfolio of products and services centered around photovoltaic systems. The core offering consists of photovoltaic installations (Neuanlagen), supplemented by battery storage systems (Batteriespeicher) and EV charging infrastructure (Ladeinfrastruktur/Wallbox). The company's proprietary load management product PeakSizer works alongside their energy management services to optimize consumption and reduce costs for commercial customers. Supporting services include installation, monitoring via PV-Control, the PV-Rechner online calculator, maintenance, cleaning, thermography inspections, module testing, and repowering of existing systems. They operate exclusively in Bavaria and Saxony, Germany, with a focus on commercial and industrial customers as well as residential clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Photovoltaikanlagen (Photovoltaic Systems) Professional planning, installation, maintenance, and service of photovoltaic systems for residential and commercial properties across Bavaria and Saxony, including new installations, repowering of existing systems, and solar park projects.
• Batteriespeicher (Battery Storage Systems) Sale and installation of battery storage systems to increase self-consumption of solar power from approximately 30% to up to 60%, reduce grid dependency, and lower electricity costs for residential and commercial customers.
• Ladeinfrastruktur / Wallbox (EV Charging Infrastructure) EV charging solutions including 11/22 kW wallboxes for residential and commercial use, and 50-150 kW fast charging stations, with planning, installation, and billing system integration services for homes, businesses, and company fleets.
• PeakSizer (Load Management) Proprietary load management product that automatically switches electrical consumers on and off to reduce peak loads, lower electricity costs, and reduce grid charges by up to 80% without disrupting business operations. Designed for commercial customers.
• Energiemanagement (Energy Management Consulting) Digital energy management consulting and analytics for commercial customers, including detailed energy analytics, CO2 reporting, energy audits per DIN EN 16247 and ISO 50001, and peak-shaving strategies integrated with the PeakSizer load management concept.
• Wartung, Service & Monitoring (Maintenance, Service & Monitoring) Ongoing maintenance, inspection, repair, cleaning, 365-day monitoring via PV-Control, thermography inspections, and module testing (MBJ) for installed PV systems, offered as a recurring service relationship.

Quantifiable outcome

• Total installed capacity: 300 MW, sufficient to power ~75,000 households for one year
• +4 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Ten partnerships are on record, tiered core and supporting.

• FeneconcoreTechnology or IntegrationFenecon is a German manufacturer of energy storage systems. Unterholzner sources batteries and storage products from Fenecon as part of its battery storage solutions for residential and commercial customers. Fenecon products are integrated into Unterholzner's comprehensive energy solutions combining PV, storage, and load management.
• WebastocoreTechnology or IntegrationWebasto is a German automotive supplier and manufacturer of EV charging solutions. Unterholzner is an authorized Webasto Service Partner, providing installation and service of Webasto wallboxes and charging infrastructure for homes and businesses.
• KacocoreTechnology or IntegrationKaco new energy is a German manufacturer of power electronics including solar inverters. Unterholzner sources inverters from Kaco as a key component of its PV system installations.
• Heckert SolarcoreTechnology or IntegrationHeckert Solar is a German manufacturer of solar modules. Unterholzner sources PV modules from Heckert Solar as part of its commitment to 'Made in Germany' quality products.
• Solar-LogsupportingTechnology or IntegrationSolar-Log is a manufacturer of monitoring solutions and data loggers for PV installations. Unterholzner integrates Solar-Log products for PV system monitoring as part of its service offering.
• K2 SystemssupportingTechnology or IntegrationK2 Systems is a manufacturer of mounting systems and structural components for solar installations. Unterholzner uses K2 mounting systems for installing PV panels on various roof types.
• SharpsupportingTechnology or IntegrationSharp is a Japanese manufacturer of solar PV modules. Unterholzner sources Sharp solar panels as an additional brand option for its installations.
• PlexlogsupportingTechnology or IntegrationPlexlog is a partner/supplier for PV components. Unterholzner sources products from Plexlog as part of its supplier network.
• Multi-ContactsupportingTechnology or IntegrationMulti-Contact (now MC4) is a manufacturer of solar connector systems. Unterholzner uses Multi-Contact connectors as part of its PV installation components.
• KBE BerlinsupportingTechnology or IntegrationKBE Berlin is a manufacturer of electrical installation products and cable systems. Unterholzner sources electrical components from KBE Berlin for its installations.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Emerging players

• Memodo: Memodo is a German PV wholesale distributor that is expanding into installation services and energy management software. It intersects with Unterholzner's value chain as both a potential supplier and emerging installer competitor in the DACH market.
• Zolar: Zolar is a German online marketplace that connects homeowners with regional PV installers and offers standardized PV system configurations. It is comparable to Unterholzner's PV-Check online calculator approach but adds a marketplace layer that may redirect some regional demand.

Direct peers

• Enerix: Enerix is a German franchise-based PV installer operating across multiple German regions with planning, installation, and service offerings for residential and commercial customers. Its regional-franchise model and integrated PV+storage+EV charging portfolio closely mirror Unterholzner's positioning as a regional installer with full-service capabilities.
• SOLARWATT: SOLARWATT is a German PV manufacturer and installer offering glass-glass modules, battery storage, and energy management solutions for residential and commercial customers. It overlaps directly with Unterholzner in delivering integrated PV+storage systems to the German market.
• IBC Solar: IBC Solar is a long-established German PV system integrator and wholesaler with installation, storage, and energy management offerings. It is directly comparable as a German-headquartered PV installer serving commercial and residential customers with similar product categories to Unterholzner.

Broad incumbents

• 1Komma5°: 1Komma5° is Germany's largest privately funded PV installer, offering integrated PV, storage, EV charging, and heat pump solutions through a digital-first, scalable model. It competes with Unterholzner in the same product categories but operates at significantly larger national scale.
• Enpal: Enpal is a major German solar leasing company that bundles PV, storage, and EV charging into subscription contracts for homeowners. While its leasing-first business model differs from Unterholzner's direct-sale model, it competes for the same residential customer base across Germany.

Others

• SMA Solar Technology: SMA is Germany's leading inverter manufacturer and a key supplier ecosystem participant for German PV installers including Unterholzner. While not a direct installer competitor, its technology underpins the inverter layer of Unterholzner's installed base and shapes the broader PV landscape.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Unterholzner Photovoltaik Service