Background & Opportunity
MAINGAU’s transformation responded to two connected market conditions: limited differentiation in traditional energy retail and growing friction in public EV charging. Before 2018, the company was primarily a regional electricity and gas supplier. That position provided established customer relationships, billing capabilities, and trust, but the underlying products were difficult to distinguish. When customers compare electricity and gas tariffs, service terms, and prices, offers can appear interchangeable. A supplier relying only on those products must defend its relationship through price, reliability, convenience, trust, or bundling. MAINGAU needed an adjacent opportunity that could make the relationship more useful without abandoning its energy base. Electric mobility created that opportunity. EV drivers often had to navigate different public-charging networks, cards, applications, and tariff structures. The problem was broader than the physical availability of a charging point. A driver needed to find a usable location, understand the price, authenticate access, and receive an intelligible bill. Cross-border travel made the friction more visible because one journey could involve several operators and commercial arrangements. A company that could coordinate access and simplify the experience could create value without owning the entire physical network. MAINGAU acted in 2018 by launching an electric-mobility project under the name EinfachStromLaden. Its initial vision was that a customer could use one card across a European charging network and receive a simpler, more transparent service. This framing was strategically important. It defined the opportunity around customer friction rather than infrastructure ownership. MAINGAU did not need to claim that it would build every charging point; it needed to make a fragmented supply system feel usable and coherent. The selected model was a relatively asset-light charging service-provider approach. MAINGAU worked with multiple charge-point operators and integrated their external charging points into its own network. Its critical capabilities therefore included network access, partner coordination, price calculation, digital accounts, customer communication, and segmentation. Physical infrastructure remained important, but the company’s main strategic control point was the layer connecting drivers to many operators. This could support broader coverage without requiring MAINGAU to own and operate every location. The model also created execution requirements. Customers do not experience a partner network as a collection of separate contracts; they experience one service. MAINGAU therefore had to make the front end coherent even when operators, charging points, and commercial terms differed. Network integration needed clear pricing, reliable information, authentication, and account management. A large nominal network would not be compelling if drivers found it difficult to use. Partner integration reduced some capital requirements, but it increased the importance of coordination and service quality. In 2019, MAINGAU changed charging from time-based billing to kilowatt-hour billing. This addressed a visible source of uncertainty. Time-based pricing can be difficult to assess because charging speed varies by vehicle, charger, battery condition, and other circumstances. Kilowatt-hour pricing links the bill more directly to the amount of energy delivered and therefore supports the promise of transparency. The change showed that the strategy involved product design, not merely signing network agreements. In 2020, MAINGAU launched its own charging app. The app created a direct digital entry point for discovering charging points, accessing the service, managing an account, and receiving communications. It also strengthened the possibility of connecting public charging with MAINGAU’s wider activities. A shared digital relationship can support customer benefits and links to household energy or other services, making the interaction broader than a single charging transaction. The physical supply remained distributed among partners, but the digital experience could be unified. Early indicators showed meaningful adoption. By 2021, MAINGAU stated that approximately 100,000 customers used its charging network. It also reported access to approximately 250,000 European charging points and charging volume of 5.1 million kWh in 2021. These figures do not establish standalone profitability, but they show that the activity had moved beyond a pilot. Customers were using the service, the network had substantial reach, and charging volume demonstrated actual activity rather than only registered accounts. Growth continued. By October 2023, MAINGAU reported 200,000 Autostrom customers and said that approximately 44,000 had been added since the beginning of that year. The public material does not identify the exact contribution of existing energy customers, digital marketing, referrals, pricing, network coverage, or partners. The defensible conclusion is therefore that the customer base expanded, not that any particular channel caused the increase. Charging also fitted a broader portfolio of electricity, gas, public EV charging, mobile communications, internet, an online shop, and business energy services. A household energy customer might become interested in vehicle charging, while an Autostrom customer might later consider household energy. Discounts and shared digital channels could lower the friction of holding multiple products and create cross-selling opportunities. However, the verified material does not disclose Autostrom revenue, profit, margin, acquisition cost, retention, or cross-purchase rates. Company-wide figures provide context but require careful attribution. MAINGAU reported average annual revenue growth of 11% from 2019 to 2022 and revenue of €545 million in 2022. Its latest company description, covering 2025, reports more than 1 million European customer relationships and approximately €1.3 billion in revenue. Those figures demonstrate substantial overall expansion, but they cannot be treated as charging-only outcomes. The evidence supports a balanced conclusion: MAINGAU built a significant charging relationship while its wider multi-product company grew. It does not prove Autostrom’s standalone economics or exact contribution to company-wide revenue.
Original Problem / Model
MAINGAU’s core insight was to treat charging friction as a customer problem, not simply as an infrastructure shortage. Before 2018, its regional electricity and gas business operated in a category with limited differentiation. Electricity and gas remained essential, but customers could compare largely interchangeable offers on price, terms, trust, and convenience. The company needed an adjacent service that made its relationships more valuable without abandoning its energy capabilities. EV drivers faced a related but distinct problem. Public charging involved fragmented networks, complex tariff structures, multiple cards, and separate applications. Finding a point was only the beginning: drivers also needed usable access, understandable pricing, authentication, and clear billing. A unified charging service could therefore address customer pain even without owning all physical infrastructure. MAINGAU connected these opportunities by using energy relationships, billing capabilities, customer benefits, and digital channels to offer a simpler mobility service while broadening the overall relationship.
Turning Point
The company launched EinfachStromLaden in 2018 with a vision of one card across a European charging network. Rather than making ownership of every charging point the basis of entry, MAINGAU integrated charging points operated by multiple charge-point operators. Its strategic focus became network access, partner coordination, price calculation, account management, and customer experience. This relatively asset-light choice could expand coverage without requiring MAINGAU to build and operate every location itself. It also shifted execution risk toward coordination: the company had to present different operators and commercial arrangements as one coherent service. Reliable information, authentication, transparent billing, and digital account management were therefore essential. The model’s advantage was not merely a larger list of charging points, but a simpler relationship connecting drivers to a distributed European network.
Core Decision
In 2019, MAINGAU changed from time-based to kilowatt-hour billing, making the relationship between energy consumed and price clearer. In 2020, it launched its own charging app. Together, these moves addressed two major sources of friction: uncertainty about cost and the need to manage charging through several disconnected interfaces.
Execution / Model / Acquisition Changes
The model produced documented customer and usage scale. In 2021, MAINGAU reported approximately 100,000 customers using its charging network, access to approximately 250,000 European charging points, and charging volume of 5.1 million kWh. These figures show that the activity had moved beyond a pilot and that customers were using the service, although they do not establish standalone profitability. Autostrom customers reached 200,000 by October 2023, and the company reported approximately 44,000 additions since the beginning of that year. The increase demonstrates continued expansion of the charging relationship, but public sources do not identify the precise role of existing energy customers, marketing, referrals, pricing, network coverage, or partners. The evidence therefore supports adoption and customer growth, not a proven causal claim about one acquisition channel or charging-specific economics.
Measurable Results
Charging became part of a wider portfolio containing electricity, gas, mobile communications, internet, an online shop, and business energy services. Shared digital channels and customer benefits created opportunities for cross-selling and retention: an energy customer could consider vehicle charging, while an Autostrom customer could consider household energy. The public evidence, however, does not report charging-specific revenue, profit, margin, acquisition cost, retention, or cross-purchase rates. Company-wide revenue grew at an average annual rate of 11% from 2019 to 2022, reaching €545 million in 2022. MAINGAU’s latest 2025 disclosure reports more than 1 million customer relationships and approximately €1.3 billion in revenue. These figures demonstrate substantial overall expansion, but they are company-wide and cannot be attributed entirely to Autostrom. The defensible result is broader scale alongside charging adoption, not proven standalone charging profitability.
Lessons
The transferable lesson is disciplined adjacency. A traditional energy supplier can create growth by solving a relevant mobility problem, integrating partner infrastructure, clarifying prices, and building a shared digital relationship. But customer growth should not be confused with charging profit. Management must separately measure segment revenue, margins, acquisition cost, retention, usage, partner costs, and cross-purchase. MAINGAU’s success lies in the coherent model and documented scale, while the limits of public evidence require careful attribution.