KELTER - Beratung Energietechnologien

What KELTER - Beratung Energietechnologien does

KELTER - Beratung Energietechnologien is a Cologne-based energy consulting practice operating as the sole proprietorship Mathias Kelter, Energieberatung. Founded in 2016, the firm delivers professional energy advisory services to residential property owners, commercial and industrial companies, municipalities, utilities, and the real estate industry, with a primary geographic focus on North Rhine-Westphalia and broader Germany. Service offerings span BAFA-sanctioned Sanierungsfahrplan Plus renovation roadmaps, DIN 16247 energy audits, machine efficiency optimization with BAFA Module 4 subsidies, end-to-end energy project execution, and corporate building planning — all centered on identifying savings, prioritizing measures, and optimizing subsidy capture (BAFA, KfW).

The firm's core deliverable is human expert advisory, built on a proprietary Energietechnologien Framework that categorizes energy technologies by sector (renewables, infrastructure, buildings, sector coupling, power plants, CCS/CCU) and Technology Readiness Level. This framework underpins a public Energietechnologien Wissensplattform knowledge platform and a digital management portal for the real estate industry that automates funding workflows. The team of eight combines engineering disciplines (energy engineering, building services, electrical engineering, civil engineering, physics), and the founder holds professional registration with the Ingenieurkammer Düsseldorf.

Commercially, KELTER runs a sales-led, direct-distribution model with no channel partners. Pricing is unit-based per engagement, starting at 300 EUR (net) for energy project execution and 800 EUR (net) for corporate building planning, with machine efficiency optimization quoted per project. Demand generation is driven by an informational website, free initial consultations, on-site analyses, and executive workshops. The firm is bootstrapped, with no external funding, no parent company, and no subsidiaries disclosed.

Name

KELTER - Beratung Energietechnologien

Legal name

Mathias Kelter, Energieberatung

Website

https://kelter-energie.de

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

KELTER - Beratung Energietechnologien is a Cologne-based energy consulting practice delivering energy audits, renovation roadmaps, machine efficiency optimization, and BAFA/KfW subsidy advisory to residential, commercial, industrial, municipal, and real estate clients across Germany.

Ownership category

akta.pro rank

Product category

Energy Consulting Services

NAICS

Environmental Consulting Services (541620), Other Scientific and Technical Consulting Services (54169)

akta.pro primary industry

Sustainability & ESG Consulting (BPAHACAK)

Keywords

• Energy consulting services
• Building energy audits
• Energy efficiency consulting
• Building renovation planning
• Energy project management

Headquarters

HQ city

Köln

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Energy Consulting Services: Professional consulting fees for energy audits, building energy analysis, renovation roadmaps, and corporate energy project management. Revenue generated through project-based engagements for residential, commercial, and industrial clients.
2. Workshops and Training: Fees for workshops on energy technologies targeting executives, decision-makers from municipalities, utilities, real estate companies, and investor groups. Provides overview of technology landscape, cost structures, pilot projects, and market potentials.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

KELTER is an energy consulting firm providing on-site energy analyses, BAFA-sanctioned renovation roadmaps, DIN 16247 energy audits, BAFA/KfW funding optimization, machine and system efficiency upgrades under BAFA Module 4, and end-to-end energy project execution for residential property owners, commercial and industrial companies, real estate firms, municipalities, and utilities. Supporting offerings include executive workshops and an energy technology knowledge platform organized by sector and Technology Readiness Level.

Product overview

KELTER is a consulting firm providing energy advisory services, not a unified software product. The portfolio consists of multiple consulting service lines: Energieberatung (energy consulting for residential and commercial buildings) with BAFA/KfW funding optimization; Sanierungsfahrplan Plus (BAFA-sanctioned renovation plans); Energieaudit und -analyse (company energy audits per DIN 16247); Energieprojekte Durchführung (project execution); Unternehmensgebäude planen und sanieren (commercial building planning); Energieeffizienz von Maschinen (machine energy efficiency); and a Digitales Verwaltungsportal (digital management portal for the real estate industry). Supporting services include Workshops on energy technologies and an Energietechnologien Wissensplattform (knowledge platform on energy technologies organized by technology readiness level).

Differentiator

Problem solved

Functional benefit

Products and services

• Energieberatung (Energy Consulting) Comprehensive energy consulting for residential buildings, commercial properties, and industrial facilities, including initial on-site analysis, BAFA/KfW funding optimization, prioritized measure conception, and project implementation support. Designed for homeowners, companies, and industrial operators seeking to reduce energy costs and future-proof buildings.
• Sanierungsfahrplan Plus Individual BAFA-sanctioned renovation roadmap with extended, customized solutions for energy efficiency and sustainable living, targeted at residential property owners seeking comprehensive modernization plans.
• Energieaudit und -analyse (Energy Audit and Analysis) Energy analysis and audits for small to large companies per DIN 16247 standards, presenting all energy flows, sources, and sinks as the basis for corporate energy decision-making.
• Durchführung von Energieprojekten (Energy Project Execution) Individual and standardized energy projects from conception and planning through execution, including trade coordination and authority applications, integrating all projects into an overall concept.
• Unternehmensgebäude planen und sanieren Planning and renovation services for commercial and industrial buildings, including energy efficiency measures catalog, trade organization, IST/PLAN comparison, and funding representation. Starting at 800 EUR net (post-subsidy), with up to 50% government funding available for qualifying projects.
• Energieeffizienz von Maschinen (Energy Efficiency of Machines) Evaluation and optimization of production machine energy efficiency with support for replacement or optimization of inefficient machines and systems, including BAFA Module 4 funding (up to 40% of purchase price). Targeted at industrial and manufacturing operators including metalworking, glass manufacturing, agriculture, bakeries, and municipalities.
• Digitales Verwaltungsportal (Digital Management Portal) Digital portal for property owners, housing cooperatives, and real estate industry providing efficient administrative tasks, data management, automated workflows, and funding optimization support for energy efficiency projects.
• Workshops Energietechnologien Workshops providing overview of the energy technology landscape across electricity, gas, heat, mobility, and IT sectors, including network access to companies and research institutes, independent technology evaluation, and pilot project connections. Targeted at executives and decision-makers from municipalities, utilities, real estate companies, and investor groups.

Quantifiable outcome

• Up to 50% government funding available for corporate building projects
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• TÜV Rheinland – Energy & Environment: Major testing and certification body with an energy consulting practice covering energy audits, energy management systems, and subsidy verification — directly competes for industrial DIN 16247 audit mandates in the same German Mittelstand market.
• Fraunhofer IBP / ISI: Fraunhofer institutes conducting applied research and consulting on building energy performance, energy efficiency, and industrial decarbonization — comparable in technical depth and workshop-driven knowledge transfer but at institutional scale.
• Drees & Sommer: Large German engineering consultancy with a strong sustainability and building-modernization practice serving real estate and industrial clients — overlaps with KELTER on energy audits, renovation planning, and ESG advisory for corporate buildings.
• Ramboll Germany: Global sustainability and engineering consultancy with significant German presence covering building decarbonization, energy audits, and ESG advisory — competes for the same corporate and real-estate clients as KELTER but at enterprise scale.
• Deutsche Energie-Agentur (dena): Germany's national energy agency, providing energy consulting, workshops, and knowledge transfer on energy transition to municipalities, industry, and consumers — comparable to KELTER in advisory scope and target audience but at vastly greater scale and government backing.

Direct peers

• BET Büro für Energiewirtschaft und Technische Planung: German energy consulting firm offering energy audits, energy efficiency studies, and technical planning for utilities, municipalities, and industry — comparable mid-sized consultancy with similar DIN 16247 audit expertise and industrial client base.
• IZES – Institut für ZukunftsEnergieSysteme: Saarbrücken-based research and consulting institute working on energy system analysis, sector coupling, and renewable integration — comparable to KELTER on the technical energy technology advisory and workshop side.
• co2online GmbH: Berlin-based nonprofit energy consulting platform focused on residential energy efficiency, BAFA/KfW funding navigation, and modernization roadmaps — directly comparable service model to KELTER's residential Energieberatung and Sanierungsfahrplan offerings.
• IKEM – Institut für Klimaschutz, Energie und Mobilität: Berlin-based energy and climate policy institute offering consulting on energy efficiency, sector coupling, and decarbonization — comparable on workshop and policy advisory work targeting municipalities and utilities, similar to KELTER's executive workshop business.

Regional players

• Verbraucherzentrale NRW – Energieberatung: NRW-based consumer energy advisory service covering residential energy audits, heating modernization, and subsidy guidance — directly comparable in scope and geography to KELTER's residential Energieberatung practice, and a key substitute buyer.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xtwitter.com/de/privacy
• LinkedInlinkedin.com/company/kelter-beratung-energietechnologien

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 KELTER - Beratung Energietechnologien