Vivid offered the fastest and most straightforward onboarding of any option we evaluated. At that stage — before investors, before revenue — the cost structure also made it the most sensible choice for an early-stage company. Effectively free in the first year, and operational within days. Those two things made the decision straightforward.
Florian Heise, Business Co-Founder, Re-Twin Energy
From a Simple Idea to a Platform Trusted by 500+
At its most elemental, the idea behind Re-Twin Energy is almost intuitive: charge a battery when electricity prices are low, discharge it when they’re high, and pocket the difference. But anyone who has tried to navigate Europe’s electricity markets knows that the simplicity stops there. Balancing markets, grid connection constraints, degradation curves, temporal restrictions, regulatory regimes — the variables multiply quickly. What looks straightforward on a whiteboard becomes a labyrinth of interdependent assumptions.
That is exactly the problem Re-Twin was built to solve — and the speed with which it solves it is one of its defining competitive advantages.
Re-Twin is an analytics platform that helps answer the question: how much money can you make with batteries in power markets? Think of us as an analytics tool through which you can quickly get to a clear answer — how much money can this particular battery make by trading in the power markets? We help answer that in five to ten minutes.
Mayur Andulkar, Co-Founder & CEO, Re-Twin Energy
Investment decisions in energy storage have historically required months of bespoke modelling. Re-Twin compresses that into a single session: enter the battery size, the co-location setup with solar or wind, the markets to participate in, the risk parameters — and within minutes, a full revenue projection emerges. Crucially, the platform doesn’t just answer the question for today. It projects forward up to twenty years, covering the entire investment lifetime of the asset.
“The complexity comes from the energy market and the full range of products within it,” explains Florian Heise, Business Co-Founder. “Our software maps that complexity and delivers a complete business case to our clients — a clear, project-specific answer to the question: what is this asset actually worth in the electricity market?”
Today, more than 500 users rely on Re-Twin — among them project developers, municipal utilities, and energy suppliers including Trianel, Prokon, wpd, badenova, Eneco, and ECO STOR. The company raised $2 million in seed funding from Gründerfonds Ruhr and Green Generation Fund, and has grown to a team of thirteen since launching in early 2025.
Profit, Purpose, and a Name Nobody Forgets
The company is structured around two distinct centres of gravity. Mayur Andulkar, Co-Founder and CEO, leads the product and technical side — designing the platform’s architecture, directing the AI and analytics engine, and running the engineering team in India. His background is rigorous: bachelor’s and master’s degrees in India, a PhD completed in Germany, and years of applied experience across automotive, chemicals, and energy sectors. His working day starts at 6 a.m. India time to align with the technical team, bridging into German working hours before the India team calls it a day around 3 p.m. German time. Florian Heise, Business Co-Founder, oversees client relations, commercial development, and the full operational infrastructure of the company — from contracts to HR to communications.
Both founders share the same answer when asked what their friends and families say they do. “My friends and family sometimes say he is doing something that we cannot even explain,” Andulkar says with a laugh. “The job description they land on is: some techno giz that they are trying to build there. When I try to ask for more details, they say: this is too much for me.” Heise gets the same response from his side: “My friends would say I do something with energy — they’re not entirely sure what, but it sounds interesting. When the conversation gets technical, some of them tend to change the subject fairly quickly.”
What everyone does understand is the larger purpose. “Our business model bridges two things that don’t always go together: commercial returns and a genuine contribution to the energy transition,” Heise says. “It’s not oil, it’s not gas — it’s on the right side of the shift.” The name encodes the same logic: RE stands for Renewable Revenue; Twin refers to the digital twin at the heart of the product. “The name was chosen deliberately because it sits right at the heart of what we do,” Heise explains.
One Timezone Apart, One Culture Shared
Re-Twin operates across Germany and India — a structure that might raise eyebrows, but which both founders describe as one of the company’s most consequential strategic decisions. “Recruiting driven, highly capable people who want to be part of an early-stage company is significantly less difficult in India than it is in Germany,” Heise says. “That differential alone has shaped how we built the business.”
Andulkar, speaking from within that reality, gives a first-hand read on the cultural dynamics. “In Germany, it’s more black and white — people say ‘I will do this’ and they do it, or ‘I won’t’ and they don’t. In India it’s sometimes in between. You have to read between the lines to understand whether something is actually going to happen the way it was said.” He is clear that neither model is better — only different. “On the Indian side, people push as much as they can to make it happen. On the German side, you always know exactly where you stand. Both work. You just have to understand which language you’re operating in.”
Making two cultures work as one team required more than goodwill. Early on, the founders established explicit company values that every team member — in Berlin or Bangalore — could anchor to. The most important: Progress over Fear. We make mistakes, we learn from them. “It was essential to establish that making a mistake is not a failure — it’s part of the process,” Heise says. “Surface it quickly, name it clearly, and move on. What we cannot afford is the same mistake repeated. You cannot build a startup without making mistakes. The question is only whether you learn from them.”
Eighteen Months, Eleven People, One Shared Belief
Building Re-Twin has been, among other things, an accelerated course in self-knowledge. The lessons Heise draws from it are direct and unsentimental. The capacity to sustain momentum when progress stalls turned out to be non-negotiable. “I always knew I had that in me, but founding a company makes it the foundation everything else rests on.” The harder discovery was about letting go. “There comes a point where you have to accept that you cannot build this alone. Things that matter deeply to you — you have to place them in someone else’s hands, knowing they will handle them differently than you would.” And the most universally applicable principle: just begin. “Perfection is not the prerequisite — action is. The first invoice we ever sent — I had no idea how to write one correctly. So I wrote it, it went through, and we moved on. That is how almost everything works.”
When asked what makes him proudest, Heise does not name the product or the funding. He names the team. “Eighteen months ago, none of this existed. It was perhaps just an idea that Mayur and I were turning over in our heads. Today, there is an entire team of eleven people — each of them choosing to invest their energy in making this better, every day.” The signal he watches for is intrinsic motivation: “When someone stays engaged on a Friday evening not because they have to, but because they genuinely believe in what we’re building — that is a profound validation. It’s the clearest signal that the culture is real, not just stated.”
Andulkar sees the same from his side of the operation. “Our engineers enjoy working at their own times and in their own space — and that’s exactly what we give them. Programming is not something you can just sit down and do in ten minutes. What matters is that they are genuinely excited to be building this. And they are.”
Banking That Keeps Up with a Startup That Doesn’t Slow Down
For a company moving fast across two continents, financial infrastructure is not a secondary concern. Heise set up Re-Twin’s Vivid Business Account before the company had investors, clients, or a full team — and the decision was driven by three factors that matter acutely at the zero-revenue stage: speed of setup, cost, and operational reliability.
In practice, two features have shaped how Heise runs the company’s finances day to day. The first is SEPA Instant Transfers. Conventional banking means waiting two to three days for transfers to clear. Vivid settles them in seconds. “There are moments — particularly in the early stages — when the ability to move money immediately matters,” Heise says. “You can commit to a payment and deliver on that commitment within minutes. In situations that require fast resolution, that responsiveness is a real asset.”
The second is a feature he did not know existed when he signed up. Vivid’s Bill Inbox creates a dedicated email address for the company; suppliers send invoices directly to it, and they appear in the account automatically, ready for review and payment. Combined with Planned Payments — which allows transfers to be scheduled precisely to their due date — Heise has built a cash management workflow that is both hands-off and precise.
The feature I rely on most heavily now is Planned Payments. When an invoice arrives, I don’t process it immediately — I schedule it for the due date. It keeps capital in the business longer and removes the administrative burden of tracking what needs to be paid when. I’ll be honest: I didn’t know Vivid had this capability before I started using it. It has become one of the most valuable parts of my financial workflow.
Florian Heise, Business Co-Founder, Re-Twin Energy
For a founder who named cash flow visibility as one of the defining pressures of early-stage company life, a platform that combines real-time balance transparency, instant execution, automatic invoice capture, and precision payment scheduling is not merely convenient. It is structurally important — one less variable in a role already defined by complexity.
That is Re-Twin Energy in miniature: always finding more signal in the noise, always asking how much more is possible.
