Software for the energy transition, custom-built
wunderwerk builds energy management, PV calculators and billing – software that fits your business model, in the EU.
- 80+ projects
- 5.0 on Google
- Clients for 10+ years
- EU & GDPR first
- Directly with the managing director
Where does your energy project stand right now?
Whether you are an energy supplier, a municipal utility, a manufacturer of energy technology, an energy start-up or a PV installer: these are the four situations we hear most often in initial consultations. We meet you where you are.
“Our systems deliver data, but our customers don't see any of it.”
We develop energy management software that brings together readings from smart meters, inverters, batteries and meters, shows generation and consumption clearly and controls loads. As a product under your brand or as a tool for your own operations.
“We still manage members, metering points and billing in Excel.”
For energy suppliers, municipalities and service providers that set up, manage or bill energy communities: member management, allocation, billing and an app for members. In Austria for renewable and citizen energy communities (EEG and BEG) with EDA data exchange, in Germany for energy sharing, tenant electricity and shared building supply.
“Our consultations take too long and we write quotes by hand.”
Calculators and configurators for photovoltaics, batteries and heat pumps: your customer enters their data, the software designs the system, calculates its economic viability and creates the quote as a PDF. The solarmaker PV calculator we developed has carried out more than 15,000 system plans.
“Customers call us because they can't see their consumption, invoices or charging sessions online.”
Customer and partner portals with self-service, billing for electricity, tenant electricity and charging sessions, connection of charging infrastructure via OCPP and integrations with ERP, CRM and billing system. Your processes come together digitally instead of in isolated solutions.
What energy software actually does
Energy software from wunderwerk covers the six use cases energy suppliers, manufacturers and installers typically start with: energy management, monitoring, energy communities, tenant electricity and energy sharing, charging management, and calculators. Each can be built on its own and later combined into one platform.
Off-the-shelf software or your own solution?
Custom energy software pays off when it is part of your business model rather than just a tool. For many tasks there is ready-made energy software, and often it is enough.
If a standard solution is cheaper for you, wunderwerk will tell you so openly in the initial consultation.
- The software is part of your offering
Your calculator, your portal or your energy management is part of your product, under your brand and with your pricing logic.
- Devices and systems have to work together
Inverters, batteries, wallboxes, smart meters, ERP and billing exchange data via interfaces instead of Excel exports.
- Rules and tariffs change all the time
EAG, EnWG, energy sharing, dynamic tariffs: your software is adapted when requirements change, without waiting for a vendor update.
- Energy data stays in the EU
Consumption data is personal data. We host GDPR-compliant in the EU, or in your own infrastructure if you prefer, and rely on open standards so you stay independent.
Energy transition software we have built
wunderwerk built, among others, the solarmaker PV calculator with more than 15,000 system plans and the thenks energy transition platform, both live in production. We are happy to show you further projects, for example from industry, in the initial consultation.
solarmaker photovoltaic calculator
Web app for installers to calculate photovoltaic systems, operated as SaaS with a trial period and subscription. Saves time in consultations and increases the closing rate.
- More than 15,000 photovoltaic system plans
- SaaS operation with automated billing
- Configuration, calculation and quote as a PDF
- Sales processes digitally integrated
thenks energy transition platform
Web platform connecting energy transition stakeholders with businesses and private individuals.
- Several user groups in one product
- Roles and permissions per stakeholder
- Connects providers with businesses and private individuals
How your energy software takes shape
An energy software project at wunderwerk runs in five steps: initial consultation, analysis and concept, a first version in 4 to 8 weeks, expansion, and operation. No big leap into the unknown: every step has a clear outcome, and you decide after each one whether to continue.
- 1
Initial consultation
Directly with the Managing Director: business model, systems, data sources and goals. You get an honest assessment of whether custom software makes sense for you or a standard solution is enough. Free and non-binding.
- 2
Analysis & concept
We clarify data sources and interfaces (smart meters, inverters, grid operators, ERP), legal requirements and processes. The result: a concept with priorities, a cost range and an assessment of when the software will pay off for you.
- 3
First version in 4 to 8 weeks: MVP or pilot
We implement the most important part first, for example with one system, one energy community or one customer group. You see early on whether the solution works in everyday use and decide based on real data.
- 4
Expansion & integration
More features, connection to billing, CRM and ERP, roles and permissions, an app for customers or members. In short steps with regular test versions.
- 5
Operation & further development
Hosting in the EU, monitoring, maintenance and support. When laws, tariffs or devices change, we adapt the software. Software that lasts instead of throwaway software.
AI writes code. We build software.
Thanks to wunderOS and our wunderFactory.
AI has opened up programming to everyone: anyone can put a prototype together today. Whether it turns into software that holds up in day-to-day operation is decided afterwards – in architecture, security, testing and maintenance over the years. That is exactly where prompting and real expertise part ways.
That is why we built our own operating system: wunderOS runs our company from sales to development. At its heart is the wunderFactory, where our AI agents, the wunderBots, build to the architecture rules, standards and tests from 20 years of software development – led by experienced software architects.
The result is software built noticeably faster and more affordably – in the quality you hire us for. We are AI experts and use that to get the best out of your project.
More software for the same budget
The wunderBots handle the routine work. You pay for architecture, decisions and results – not for legwork.
Live in weeks, not months
From the workshop to the first usable version, with changes after that in days. You see early on what works.
Quality is built in, not bolted on
Tests, reviews and security checks run automatically in the wunderFactory with every change – not just when there is time.
Architects, not prompters
The AI executes, we decide: data model, interfaces, operations. That way your software stays maintainable and extensible five years from now.
Bottom line: Bespoke software on terms that make sense for SMEs too – built with AI, with software architects accountable for it.
Thank you very much!
I will get back to you as soon as possible!
You can also book an appointment in my calendar right away: Book an initial consultation
Not just clients. Partners.
We focus on long-term partnerships. You stay flexible thanks to open standards and clear documentation.
What our clients say:
A selection of our client feedback.
★★★★★Many thanks for building and looking after our online learning platform.
We can wholeheartedly recommend Christoph and his entire team.
Whatever we ask for, almost everything is made possible, and the ongoing personal contact works brilliantly too. Many thanks.
We run the online shop thecurtain.shop for made-to-measure curtains and Roman blinds.
Working with wunderwerk was excellent in every respect.
Thanks to their work, we can offer our customers an intuitive, professional shopping experience that perfectly reflects our craftsmanship. Many thanks for the great collaboration!
Very likeable wunderworkers! Fast, uncomplicated, competent and always ready to save the world!
Highly competent support. Well advised all round.
Chris knows how to solve a problem. Quality has a name: wunderwerk.io
We had the wunderworkers develop bespoke industrial software for creating recipes for a highly sensitive industrial process.
The collaboration was extremely professional from the outset: the team quickly understood our complex requirements, implemented them precisely and always paid close attention to maximum reliability and security. I would particularly like to highlight their technical know-how, clean documentation and fast response times for questions or change requests.
The recipe editor is now running in several plants in Sweden, Italy and the Czech Republic.
The software runs reliably, is intuitive to use and our customers are completely satisfied. We can recommend wunderwerk without reservation!
wunderwerk built a digital solution for my photography business that has been running stably and reliably for years. The support is top-notch, reliable and competent. I can only recommend them.
Christoph Niedermoser and his team impressed us with their professionalism, precision and reliability, both in the consulting phase and in the implementation that followed.
Our requirements were implemented perfectly, and the GPS tracking system has now been in successful use in several of our facilities for a number of years.
Chris and his team gave me superb advice on my app idea. Uncomplicated, fast and professional! Highly recommended!
We have already implemented and completed several projects together over the past few years.
Professional implementation and personal contact.
Highly recommended!
Perfect implementation of our
billiards platform.
A very pleasant collaboration. It was fun! Highly recommended!
🇦🇹 Funding check
Which funding fits now?
Planning a digitalisation project in Austria? KMU.DIGITAL, Austria’s SME digitalisation programme, no longer accepts new applications: its budget is used up, and it will not continue from 2027. As a KMU.DIGITAL Certified Digital Consultant (CDC), I show you in a free funding check which programmes fit your project now.
What we clarify in a free 15-minute call with the founder of wunderwerk:
- Whether your company and your project are eligible
- Which funding programme is currently open
- What you need to consider before applying
- Which costs are eligible
Important: The safe order is: application first, costs afterwards. Only the funding body can decide.
Why us?
What else is on your mind?
Many projects touch more than one topic. Here are the other areas in which we support businesses.
Ready for software that drives your energy transition?
Energy management, energy community, calculator or portal: in the free initial consultation we clarify what your solution needs to do, roughly what it costs and what the first step looks like.
Frequently asked questions about software for the energy transition
Your question isn't listed? We will answer it directly with the Managing Director in the free initial consultation.
How much does custom software for the energy transition cost?
The cost of custom energy software depends mainly on scope, interfaces and data volumes, and wunderwerk gives you a transparent cost range before every step. A PV calculator is quicker to build than an energy management system that controls devices and processes data from several grid operators. That is why wunderwerk starts with a clearly defined first step (MVP, pilot or proof of concept) instead of pricing one big project up front. The initial consultation is free, and you can get a first estimate via the cost calculation.
What is energy management software?
Energy management software (EMS) records generation and consumption, for example of a PV system, battery, heat pump and wallbox, analyses the data and controls the devices so that as much self-generated electricity as possible is used and load peaks are reduced. Companies also use it for energy monitoring and reporting. wunderwerk develops energy management software for manufacturers, energy suppliers and service providers who want to offer it to their customers or build it into their own products.
What software does an energy community in Austria need?
An energy community (EEG or BEG) needs management of members and metering points, the grid operator's energy data from the EDA data exchange, allocation by distribution key and billing that is correct for VAT purposes. For a single community, ready-made solutions are often enough. wunderwerk develops custom software for energy suppliers, municipalities and service providers that manage many communities, have their own tariffs and processes or want to offer the solution under their own brand.
What does energy sharing in Germany mean for software?
Since June 2026, distribution system operators in Germany have had to enable energy sharing technically under § 42c EnWG: electricity from a renewable energy system is shared with consumers in the same balancing area. This requires software for participant management, allocation of meter readings and billing, similar to tenant electricity and shared building supply. wunderwerk develops such solutions for energy suppliers, municipal utilities and project developers that are building energy sharing as an offering of their own.
Can you connect smart meters, inverters, wallboxes and systems such as ERP or CRM?
Yes. wunderwerk connects devices and data sources via their interfaces: manufacturer APIs and clouds, protocols such as Modbus, MQTT and OCPP, data from grid operators and smart meter portals, and existing systems such as ERP, CRM and billing. We build with open, widely used technologies such as TypeScript, React, Next.js and Laravel, clearly documented. Where there is no clean interface, or a legacy system causes security or data protection problems, we work out a reliable and maintainable approach in the concept phase before any development starts.
How long does it take to develop energy software?
wunderwerk delivers a first usable version (MVP or pilot) in 4 to 8 weeks, for example for one system, one energy community or one customer group. After that, the software grows in short steps with regular test versions; the overall timeline depends on scope and interfaces. That way you see tangible benefits early instead of waiting for one big finish.
Is energy data safe and GDPR-compliant with you?
Yes. Consumption data from smart meters is personal data, and wunderwerk treats it as such: hosting in the EU, on-premise or in your own cloud if you prefer, roles and permissions, encryption and deletion concepts. We develop to current security standards and build in data protection from the start instead of retrofitting it.
Who is custom energy software suitable for?
Custom energy software from wunderwerk suits energy suppliers, municipal utilities and grid operators, manufacturers and providers of energy technology, energy start-ups, municipalities and service providers working with energy communities, as well as larger PV, battery and heat pump installers. In other words, for anyone whose offering includes software or whose software connects complex processes. In the initial consultation, wunderwerk will also tell you openly if a standard solution is a better fit.
Who runs the software, and what happens when laws or tariffs change?
wunderwerk can take over operation: hosting in the EU, monitoring, maintenance, support and adjustments to new requirements such as the EAG, the EnWG or new tariff models. Software built by wunderwerk runs for years; some clients have worked with us for more than 10 years. Because we work with open standards and document our work, changes stay predictable and you stay independent.
Is there funding for energy transition software projects?
Yes, digitalisation projects in Austria, Germany and Switzerland are funded through various programmes, depending on country, region, company size and project. However, KMU.DIGITAL, the Austrian SME programme, no longer accepts new applications and will not continue from 2027. In a free funding check, wunderwerk shows you which programmes are available for your project now.
Why wunderwerk for energy transition software, and do you work on site?
wunderwerk supports the energy transition out of conviction and brings more than 20 years of project experience from over 80 projects, including the solarmaker PV calculator with more than 15,000 system plans and the thenks energy transition platform. You speak directly with the Managing Director and get consulting, development and operation from a single source. The small developer team works remotely and on site in Tyrol, Salzburg, Vienna and Berlin.