BGA Mammendorf GmbH & Co KG
German renewable-energy company operating under the ABEL ReTec brand, specialising in photovoltaic systems, battery storage and heat pumps.
Last updated September 28, 2026
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Overview
BGA Mammendorf GmbH & Co KG is a German company that trades under the brand ABEL ReTec. According to its own corporate communications, ABEL ReTec is a specialist in renewable energies with more than 20 years of experience in the technical planning, installation and commissioning of innovative photovoltaic (PV) systems and electricity storage units with energy-management systems, including smart control of heating, hot-water production and e-mobility. As a full-service energy-solutions provider it also plans and installs air-to-water heat pumps. The company's customers are private households as well as commercial, industrial and agricultural businesses and public-sector clients. Its head office, with more than 100 employees, is in Engelsberg in Upper Bavaria, Germany. The firm positions itself as a manufacturer-independent adviser that selects components from premium suppliers to deliver the most economically and technically suitable solution for each customer. ABEL ReTec markets itself with the slogan "Energiewende mit uns ist rentABEL" (roughly, "the energy transition pays off with us"), a play on the German word "rentabel" (profitable) and the ABEL name. Its website offers an online solar calculator that lets prospective customers estimate system size, PV output, annual production, electricity-cost savings, feed-in-tariff income, degree of self-sufficiency and annual CO2 avoidance in about two minutes, without having to hand over contact details to receive the initial assessment. Customers who do submit their data and subsequently place an order are offered a 250 euro discount on the net order value. The company is registered in Germany and is a private, non-listed business. Its legal name, BGA Mammendorf GmbH & Co KG, differs from the ABEL ReTec trading brand, and the relationship between the two names is not fully documented in the available evidence. The available sources describe the business as a German company active in the renewable-energy installation market.
History
BGA Mammendorf GmbH & Co KG is a German company that operates under the ABEL ReTec brand. Public evidence about the legal entity itself is limited: Wikidata records it simply as a German company, and the available corporate website describes the business under the ABEL ReTec name rather than the BGA Mammendorf legal name. According to the company's own "About us" page, ABEL ReTec has more than 20 years of experience, competence and enthusiasm for renewable energies. Its core competencies, developed over that period, are the technical planning, installation and commissioning of innovative photovoltaic systems and electricity storage units with energy-management systems, including smart control of heating, hot-water production and e-mobility. Over time the company expanded from PV and storage into a full-service energy-solutions provider that also plans and installs air-to-water heat pumps. The firm states that its head office, with more than 100 employees, is in Engelsberg in Upper Bavaria, Germany. Its customer base has grown to include private households as well as commercial, industrial and agricultural businesses and public-sector clients. The company emphasises manufacturer-independent advice, components from premium suppliers and highly efficient energy concepts. In its marketing the company uses the slogan "Energiewende mit uns ist rentABEL" and has developed digital tools such as an online solar calculator that guides users through five input stages and provides an initial assessment of system size, PV output, annual production, electricity-cost savings, feed-in-tariff income, self-sufficiency and annual CO2 avoidance. The calculator is presented as privacy-safe and, unlike many competing tools, does not require contact details to receive the initial estimate; customers who do provide their data and later place an order are offered a 250 euro discount on the net order value. The available evidence does not specify the founding year of BGA Mammendorf GmbH & Co KG, its founders, its ownership structure or the exact relationship between the BGA Mammendorf legal entity and the ABEL ReTec trading brand. The company is not known to be listed on a stock exchange and is treated here as a private German business.
Products and positioning
Manufacturer-independent full-service provider of renewable-energy solutions for private, commercial, industrial, agricultural and public-sector customers.
Photovoltaic systems
Technical planning, installation and commissioning of innovative PV systems.
Electricity storage systems
Battery storage with energy-management systems.
Energy management systems
Smart control of heating, hot-water production and e-mobility.
Air-to-water heat pumps
Planned and installed as part of the company's full-service energy solutions.
Online solar calculator
A web tool giving an initial estimate of system size, output, savings, feed-in income, self-sufficiency and CO2 avoidance in about two minutes.
Sources3 sources
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