SE Sustainable Exergy

What SE Sustainable Exergy does

SE Sustainable Exergy GmbH is a Bavaria-based renewable energy solutions provider headquartered in Unterhaching with a branch office in Kirchheim bei München. The company was founded in 2011 (with one firmographic source citing 2015) and operates as a German GmbH under the leadership of Managing Directors Maurizio Castellano and Stefan Durach. Its service portfolio spans the full renewable energy stack for decentralized generation: photovoltaic (PV) installations, combined heat and power (BHKW) systems, wind turbines, energy storage, energy audits, energy management, and load management (Lastmanagement), delivered alongside renewable energy consulting.

The company's commercial model blends traditional project-based delivery with recurring-revenue structures, notably a PPA-as-a-Service offering channeled through a proprietary "Green Virtual Power Plant" aggregation framework and rental electricity (Mietstrom) models for residential and small-commercial customers. A branded AI-supported SE-Monitoring layer — covering anomaly detection, KPI-based alerting, and data-driven process optimization — sits across the installed asset base and is positioned as a software-style overlay to the hardware project business. The technical backbone combines physical asset deployment with a virtual power plant and a monitoring software stack.

SE Sustainable Exergy serves three explicit customer segments — private households, industry & commerce, and the public sector/municipalities — with operational focus on the Munich metropolitan region and Germany-wide reach. Go-to-market is consultation-driven, anchored by a core partnership with PLANplus Technische Gebäudeplanung GmbH for technical building planning integration. The company employs approximately 5 people, with no disclosed funding rounds or external capital events in the source data.

Name

SE Sustainable Exergy

Legal name

SE Sustainable Exergy GmbH

Website

https://x-ergy.com

Company type

Private

Founded year

2011

Operating status

Operating

Short description

SE Sustainable Exergy GmbH is a Bavaria-based renewable energy solutions provider offering PV, CHP, wind, storage, energy audits, and AI-supported monitoring, plus PPA-as-a-Service and rental electricity models. It serves residential, commercial, and public-sector customers across Germany.

Ownership category

akta.pro rank

Product category

Renewable Energy Services

NAICS

Solar Electric Power Generation (221114), Electric Power Generation (22111)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

PPA Origination, Structuring & Offtake Contracting (Physical/Financial, Sleeves) (EUAMAMAD)

akta.pro secondary industries

Retail & Community PPAs (Community Solar/Shared Renewables) (EUAGADAC), Resilience & Backup Power Solutions (Critical Facilities, Islanding) (EUAMAJAK), Microgrid Development, EPC & Integration (EUAMAJAB)

Keywords

• Renewable energy services
• Photovoltaic installation
• Energy supply contracts
• Energy management consulting
• Combined heat power systems

Headquarters

HQ city

Unterhaching

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. PPA-as-a-Service: Access to sustainable energy from the company's own green virtual power plant through customized electricity supply contracts and feed-in contracts, providing ongoing revenue from energy delivery services.
2. Photovoltaic System Installation: Planning and installation of solar modules for residential, commercial, and industrial clients, offering project-based revenue from system sales and installation services.
3. Energy Services: Additional energy services including energy audits, energy management consulting, load management optimization, and electromobility integration services.
4. Rental and Savings Models: Innovative rental models for self-generated green energy, allowing property owners to market surplus electricity to tenants or third parties.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

SE Sustainable Exergy GmbH plans, builds, and operates renewable energy systems (photovoltaic, wind, combined heat and power, and storage) for private households, industry/commerce, and public-sector clients across Germany. Its core commercial mechanism is PPA-as-a-Service, which delivers electricity from the company's own green virtual power plant via customized supply and feed-in contracts, supplemented by fee-based energy services such as audits, energy management, load management, and AI-supported monitoring.

Product overview

SE Sustainable Exergy offers an integrated portfolio of renewable energy solutions centered around a PPA-as-a-Service model, supplemented by engineering services for Photovoltaikanlagen, Windkraftanlagen, Blockheizkraftwerke (BHKW), and Energiespeichersysteme. The company provides a comprehensive suite of energy services including Energieaudits, Energiemanagement, Lastmanagement, and KI-unterstütztes SE-Monitoring. The Mietstrom und Sparmodelle offering enables property owners to monetize self-generated green energy. All services are designed for private households, industry, commerce, and public sector clients, with the PPA-as-a-Service serving as the core energy supply mechanism connected to their own green virtual power plant.

Differentiator

Problem solved

Functional benefit

Products and services

• PPA-as-a-Service Provides access to sustainable energy from the company's own green virtual power plant through customized electricity supply contracts and feed-in contracts, available to enterprises, municipalities, and private clients in Munich and across Germany.
• Photovoltaikanlagen (PV-Anlagen) Planning and installation of photovoltaic/solar modules for residential, commercial, and industrial clients, addressing complex requirements including statics, lightning protection, fire protection, electrical integration, and grid connection.
• Mietstrom und Sparmodelle (Rental electricity and savings models) Innovative rental and savings models that allow property owners to market self-generated surplus green electricity directly to tenants or third parties.
• Blockheizkraftwerke (BHKW) Combined heat and power (CHP) plants that simultaneously generate heat and electricity, providing high energy efficiency for industrial, commercial, and residential applications.
• Windkraftanlagen (Wind energy systems) Development and integration of wind energy systems for utilizing renewable wind energy sources as part of customer energy supply portfolios.
• Energiespeichersysteme (Energy storage systems) Implementation of battery storage and other storage technologies that store excess energy for on-demand retrieval, complementing PV, wind, and CHP installations.
• Energieaudits (Energy audits) Analysis of energy consumption and identification of savings potential in business customers' energy use, delivered as a professional services engagement.
• Energiemanagement (Energy management) Development and implementation of comprehensive energy management systems to monitor and optimize customer energy consumption across their facilities and assets.
• Lastmanagement (Load management) Optimization of customer energy consumption through monitoring and controlling load peaks, including peak-load reduction for industrial and commercial buyers.
• Beratung zu erneuerbaren Energien (Consulting on renewable energies) Consulting services for the integration of renewable energy sources such as solar, wind, or geothermal energy across private, commercial, and public-sector clients.

Quantifiable outcome

• Reduce ecological impact while maximizing profitability
• +2 more outcomes

Named customers3 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

AI capability3 records

Feature2 records

Partnerships

Two partnerships are on record, tiered core and minor.

• PLANplus Technische Gebäudeplanung GmbHcoreImplementation/ SI/ Consulting PartnerLong-standing partnership for comprehensive technical building planning. The company conducts holistic planning using state-of-the-art digital tools, preparing technical documentation and tendering processes independently to ensure best market prices and technically perfect solar installations.
• DeveleyminorOthersPartner company shown on the career page, nature of partnership not explicitly detailed.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Enpal: Enpal is Germany's leading residential solar leasing and PPA-as-a-Service provider, offering turnkey PV, storage, and wallbox solutions. Directly comparable to SE Sustainable Exergy on B2C/B2B solar PPA and installation business model in Germany.
• Next Kraftwerke: Next Kraftwerke operates one of Germany's largest virtual power plants, aggregating distributed renewable assets and trading on energy markets. Comparable to SE Sustainable Exergy's green virtual power plant and PPA structuring capabilities, though at much greater scale.
• 1Komma5° (1point5 Degrees): 1Komma5° is a fast-growing German renewable energy company offering residential and commercial solar, heat pumps, and storage with a software/AI platform (Heartbeat AI). Highly comparable on AI-enabled monitoring, PPA-style offerings, and German residential focus.
• Lichtblick: Lichtblick is a Hamburg-based renewable electricity supplier operating its own virtual power plant (ZuhauseKWK) and offering green PPAs and CHP-based offerings. Comparable on VPP-driven energy supply and renewable supply to households and businesses in Germany.
• Solarwatt: Solarwatt is a German solar manufacturer and installer offering PV systems, storage, and energy management with a focus on residential and commercial customers. Comparable on integrated PV + storage + energy management offerings for the German market.
• Sonnen (by Shell): Sonnen is a leading German residential battery storage and virtual power plant operator, offering solar + storage + energy community services. Comparable on VPP aggregation, energy storage, and residential energy supply models.
• energy2market (e2m): energy2market is a German virtual power plant operator and direct marketer of renewable energy, offering PPA and energy management services. Comparable on VPP-driven renewable energy trading and PPA structuring for commercial and industrial customers in Germany.

Broad incumbents

• BayWa r.e. BayWa r.e. is a major German renewable energy developer, trader, and service provider active across solar, wind, and storage globally. Comparable as a broader incumbent in the same renewable EPC and energy services space SE Sustainable Exergy occupies, but at vastly larger scale.
• E.ON Energie Deutschland: E.ON is one of Germany's largest energy utilities with extensive offerings in solar, storage, heat pumps, and PPAs for households and enterprises. Comparable as a broad incumbent competing for the same B2C/B2B renewable customers with deeper capital and brand.

Emerging players

• GreenCom Networks: GreenCom Networks provides an IoT energy management and VPP platform connecting distributed renewable assets. Comparable on the AI/monitoring and energy management software layer that complements SE Sustainable Exergy's KI-unterstütztes SE-Monitoring.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 SE Sustainable Exergy