Bringing Plug-in Solar to Britain: An Interview with Worldwide Solar's Founder

Worldwide Solar Ltd is a UK supplier of plug-in solar equipment, offering a growing range of ENA-approved kits with different solar panels, microinverters and mounting options.

The business was established in January 2025 by René Tetzner, who set out to make small-scale solar generation more accessible and affordable for UK households.

With 31 ENA-approved kit configurations, Worldwide Solar has become an active participant in Britain's emerging plug-in solar market.

We invited René to share his experiences establishing the business, the challenges he's encountered along the way and his perspective on where the industry is heading.

What follows is a fascinating insight into what it takes to establish a plug-in solar business in Britain, told by someone experiencing the challenges and opportunities of this emerging industry firsthand.

How Worldwide Solar got started

René, tell us a little about Worldwide Solar. When did you start the business, and what attracted you to the emerging UK plug-in solar market?

Worldwide Solar Ltd was established on 15 January 2025, but we didn't record our first sale until September 2026. So it took us more than a year and a half to get to that point. During that time, we attended numerous solar industry exhibitions, met with manufacturers and suppliers, explored different technologies and developed our own ideas about how to bring affordable Plug & Play solar systems to the UK market.

What initially attracted me to Plug & Play solar was the simplicity and ingenuity of the technology. I still find it fascinating that you can combine a solar panel, a microinverter and a mounting system, connect everything together, and start generating your own electricity. The idea that ordinary households could generate their own renewable electricity without the expense and complexity of a traditional solar installation really appealed to me.

The idea that ordinary households could generate their own renewable electricity without the expense and complexity of a traditional solar installation really appealed to me.

From the beginning, our ambition has been to make solar energy accessible and affordable. We want to offer systems that are straightforward to install, without requiring an electrician for a standard compliant Plug & Play installation, and that can potentially pay for themselves within two to four years through savings on electricity bills. Of course, the actual payback period depends on factors such as the purchase price, sunlight conditions, household electricity consumption and how much of the generated electricity is used directly.

Why 31 different plug-in solar kit configurations?

You've secured ENA approval for 31 different plug-in solar kit configurations, with various combinations of panels, microinverters and mounting equipment. Why so many options, and what should customers consider when choosing the right kit for their needs?

Our main objective is to give customers a choice, because everyone's circumstances and requirements are different.

We therefore wanted to offer a wide range of configurations rather than limiting customers to just one or two standard packages. Some customers prefer compact panels because they have limited space, while others are looking for the highest possible energy output and efficiency. We even offer systems with large, high-performance solar panels of the type more commonly found in commercial installations and utility-scale solar farms.

We also recognise that customers have different installation requirements. Some already have suitable mounting equipment, while others need a complete system with mounting brackets included. Similarly, different microinverters offer different features, such as independent MPPT channels and Wi-Fi monitoring. By securing ENA approval for 31 different configurations, we aim to give customers the flexibility to choose a system that best suits their available space, installation location, budget and electricity consumption.

Ultimately, I believe customers should consider three main factors when choosing a Plug & Play solar system: how much space they have available, how much electricity they expect to generate and use, and how quickly the system is likely to pay for itself. The most expensive or most powerful system is not necessarily the best choice for everyone. What matters is finding the right balance between performance, affordability and practical installation.

Choosing mounting equipment for plug-in solar

You were the first supplier to offer ENA-approved plug-in solar kits without mounting equipment included. What advice would you give customers choosing their own mounting solution?

We realised quite early that not everyone wants or needs a complete package with mounting equipment included. Some customers already have suitable mounting systems, while others prefer to design or build their own solutions. By offering ENA-approved Plug & Play kits without mounting equipment, we give these customers greater flexibility while also helping them avoid paying for components they don't need.

My advice to anyone choosing their own mounting solution would be to prioritise safety, stability and durability. Solar panels are designed to last for decades, so the mounting system should be equally reliable. It is particularly important to consider wind loads, the weight and dimensions of the panels, and the suitability of the installation location. This becomes even more important with larger solar panels, which can experience considerable wind forces.

However, that flexibility must always go hand in hand with safety. A good mounting system doesn't necessarily have to be expensive, but it does need to be properly designed and securely installed.

What's next for Worldwide Solar's product range?

Of those 31 approved configurations, eight are currently available through your online store. When can customers expect the remaining options to become available, and can you give us a sneak peek at what's still to come?

We currently have another eight Plug & Play solar kit configurations awaiting approval from ENA Connect Direct. If these are approved, that would bring our total to 39 approved configurations. However, the number of approved configurations doesn't necessarily reflect the number of products we can eventually offer. A single ENA-approved configuration can form the basis for numerous different product packages, depending on the mounting options and accessories included. This means that our existing approvals alone could potentially allow us to offer dozens of different kits over time.

Looking ahead, we are particularly excited about expanding our range of solar mounting systems. By spring 2027, we hope to have several additional mounting options available, giving customers even greater flexibility in where and how they install their solar panels. We are exploring solutions for different surfaces and locations because we believe solar panels shouldn't be limited to traditional rooftops or gardens.

One of the things I find most exciting about Plug & Play solar is the enormous potential for creative installations. With the right mounting equipment, solar panels can be incorporated into many different parts of a property, whether that's a flat roof, patio, fence, pergola or other suitable structure. Of course, every installation needs to be safe, secure and comply with the relevant regulations, but beyond those practical considerations, the possibilities are remarkably varied.

The challenges of bringing plug-in solar to Britain

From a supplier's perspective, what have been the biggest challenges in bringing plug-in solar kits to the UK market? Has anything proved more difficult than you initially expected?

It took us a little over a year and a half to bring our first Plug & Play solar kit to the UK market, and the journey was considerably more challenging than I had initially anticipated. One of the biggest obstacles has been navigating the UK's regulatory and certification requirements.

However, perhaps the most frustrating challenge has been the reluctance of many international manufacturers and distributors to supply the British market. During our discussions with potential suppliers, we repeatedly encountered companies that were perfectly happy to serve customers across the European Union but had little interest in expanding into the UK. Their reasoning was often quite straightforward: they already had established sales operations and warehouses in countries such as the Netherlands and Germany, and supplying Britain would introduce additional customs procedures, paperwork, logistics costs and administrative complications following Brexit.

From their perspective, the UK market simply wasn't attractive enough to justify establishing a separate sales operation or warehouse here. In some cases, we found that importing products directly from manufacturers outside Europe was actually easier than purchasing them from suppliers with stock already sitting in European warehouses. That is quite a remarkable situation when you think about it.

In some cases, we found that importing products directly from manufacturers outside Europe was actually easier than purchasing them from suppliers with stock already sitting in European warehouses.

What I found particularly frustrating was that some suppliers were unwilling even to explore a potential business relationship with us. We were ready to invest in their products and introduce them to British customers, but they simply didn't see the commercial benefit of dealing with the additional complications of supplying the UK.

I believe there is a genuine opportunity here, but bringing affordable products to UK customers requires considerably more work behind the scenes than most people might imagine.

Consumer demand, planning restrictions and public awareness

Now that plug-in solar kits are becoming more widely available in the UK, how would you describe customer demand so far? And from your experience, what's currently holding more people back from buying a kit?

I believe there is considerable potential demand for Plug & Play solar in the UK, but two major obstacles are currently preventing the market from developing as quickly as it could: planning restrictions and a lack of public awareness.

The first issue is the regulatory environment surrounding residential solar installations. I can give you an example from my own experience. I installed solar panels in my front garden to generate electricity for my household. However, the developer responsible for our housing development considers the panels unattractive and claims they are discouraging prospective buyers from purchasing the remaining properties. As a result, I have been threatened with planning enforcement action and legal proceedings to force their removal. So far, I have stood my ground.

This experience has convinced me that the government needs to go much further in simplifying the rules for small residential solar installations. In my view, homeowners should have a clear legal right to install small Plug & Play solar systems on their own properties without having to navigate complicated planning procedures or seek permission, provided basic electrical and structural safety requirements are met. We should be encouraging households to generate clean electricity, not creating unnecessary obstacles.

I believe there is considerable potential demand for Plug & Play solar in the UK, but two major obstacles are currently preventing the market from developing as quickly as it could: planning restrictions and a lack of public awareness.

The second obstacle is something I encounter regularly when showing friends and visitors the solar panels in my garden. Many simply cannot believe that generating your own electricity can be so straightforward. To people unfamiliar with the technology, it almost seems like something from science fiction.

I often get questions such as: "How does the electricity know where to go?" or "Who tells the appliances to use electricity from the solar panels instead of the grid?" People struggle to understand that the solar electricity simply contributes to the electricity supply within the home, reducing the amount that needs to be drawn from the grid. There is no need for individual appliances to be programmed or instructed to use solar power.

This tells me that we have a considerable amount of public education ahead of us. Many households still associate solar energy with expensive rooftop installations, professional installers and complicated electrical systems. They are simply unaware that small, affordable Plug & Play alternatives exist.

I believe the government has an important role to play through public information campaigns that explain how Plug & Play solar works, what its benefits are and how households can use it safely.

Why do UK plug-in solar kit prices vary so much?

Across the UK plug-in solar market, there's a surprisingly wide variation in prices between suppliers, even for kits with very similar specifications. What's driving those differences, and do you think some suppliers are charging too much? Looking ahead, do you expect prices to fall further?

I think the considerable price differences between suppliers reflect different business approaches. Of course, there are legitimate reasons why prices vary, including purchasing costs, shipping, storage, warranties and customer service. However, I also believe that some companies are primarily focused on maximising their profit margins, whereas our approach is to keep margins relatively small and make the systems as affordable as possible.

Looking ahead, I hope prices will become more competitive as the UK market develops, more suppliers enter the market and sales volumes increase. Greater competition should benefit consumers, and I believe affordability will be one of the most important factors determining whether Plug & Play solar becomes widely adopted in Britain.

Will plug-in solar become mainstream in Britain?

Finally, looking to the future, plug-in solar is still in its infancy here in the UK. Do you think it has the potential to become a mainstream household technology, or will it remain a relatively niche product? What do you think will determine its success?

Absolutely. I firmly believe that Plug & Play solar has the potential to become a mainstream household technology in the UK, and there is a very simple economic reason behind that. Unlike many household purchases, a Plug & Play solar system is an investment that can pay for itself through savings on electricity bills. Once the system has paid for itself, it can continue generating electricity and reducing household energy costs for many years to come.

Ultimately, I don't see Plug & Play solar as a niche product. I see it as a practical household technology that could eventually become as familiar as other energy-saving improvements.

Germany provides an excellent example of what is possible. Plug & Play solar systems became widely accessible there in 2019, with approximately 40,000 units sold in the early stages of the market. By 2025, annual sales had reportedly grown to around half a million units. That is remarkable growth for a technology that was relatively unfamiliar to most households just a few years earlier. I believe the UK has the potential to follow a similar path, particularly as electricity costs remain a significant concern for many families.

Ultimately, I don't see Plug & Play solar as a niche product. I see it as a practical household technology that could eventually become as familiar as other energy-saving improvements. The economic argument is compelling, the technology already exists, and countries such as Germany have demonstrated that there is a substantial market. What we need now in the UK is a supportive regulatory environment and greater public understanding. If we can achieve those two things, I believe Plug & Play solar has a very promising future.

Find out more about Worldwide Solar

René's experiences offer a fascinating glimpse into the challenges of bringing plug-in solar to Britain, but also the opportunities that lie ahead as the market develops and more households discover the technology.

A big thank you to René for taking the time to share his experiences, insights and thoughts on the future of plug-in solar in the UK.

At the time of writing, Worldwide Solar has secured ENA approval for 31 plug-in solar kit configurations, with eight available to purchase through its online store.

Editor's note: Germany's Federal Network Agency recorded approximately 430,000 new plug-in solar registrations in 2025. By October 2026, the cumulative number registered had reached approximately 1.52 million, according to an analysis of the official register. However, research published by Germany's Federal Environment Agency suggests the actual number of installations could be substantially higher, estimating nearly 3 million systems were already operating by the end of 2024, including those not officially registered.

Editorial disclosure (updated 30 October 2026): This interview was conducted and published independently on 28 October 2026. It was not sponsored, commissioned or paid for by Worldwide Solar, and no commercial or affiliate relationship existed at the time of publication.

Since publication, PluginSolarCalculator.com has entered into an affiliate partnership with Worldwide Solar. We now earn a commission on qualifying purchases made through links to the company. This does not affect our editorial independence.