The marketing around plug-in solar makes it look simple: panels arrive, you clip them up, plug them in, electricity happens. And it genuinely is that simple once everything is in place. But there are a handful of things that regularly catch first-time buyers by surprise. Here are ten of them.
1. Stock availability is not reliable right now
The UK plug-in solar market is new and demand has spiked since the government announcement in March 2026. Several suppliers, including EcoFlow, have experienced significant panel stock delays. Do not assume a kit listed as available will ship within a few days. Check the actual lead time before ordering, and ask specifically about panel availability rather than just the microinverter. Our first-hand experience article covers this in detail.
2. You need to notify your DNO before connecting
The G98 notification to your Distribution Network Operator is a legal requirement before connecting any plug-in solar system. It is free and takes about 15 minutes online, but it is easy to overlook if nobody has mentioned it to you. Find your DNO and submit the form before connection day.
3. The electrician is a separate cost
Until the BSI product standard is published around July 2026, you need a CPS-registered electrician to make the final electrical connection. This is not included in the kit price and typically costs £250 to £450 depending on location and complexity. Factor this into your budget.
4. Finding an electrician who knows what plug-in solar is can take time
Not all electricians are familiar with G98 notifications and microinverter connections. When contacting electricians, ask specifically about G98 and plug-in solar experience. Some will be familiar; others will not. Our installer guide has practical advice on finding the right person.
5. South-facing is genuinely non-negotiable for good results
East or west-facing installations work but produce significantly less. North-facing does not work. If you cannot get a south or south-westerly facing position, use the savings calculator to check the numbers before committing to a specific mounting position.
6. Cloudy days still generate electricity
The number one misconception about UK solar is that cloudy weather stops generation. It reduces it, not eliminates it. Your panels will produce electricity on every daylight day, overcast or not. The UK’s annual solar resource is comparable to Germany, which has 1.5 million plug-in installations and counting.
7. Winter output is much lower than summer
The flipside of point six is that seasonal variation is significant. April to September accounts for around 70 to 80 percent of annual generation. December and January produce a fraction of what June does. Plan your budget expectations around annual figures, not peak summer performance. Our winter performance guide covers this honestly.
8. You will not earn export payments
Plug-in solar systems cannot currently access Smart Export Guarantee payments for surplus electricity. Any excess you generate and do not immediately use flows back to the grid unpaid. This makes self-consumption important: using electricity during daylight hours rather than overnight maximises your saving.
9. The app data is genuinely useful
Most kits come with a monitoring app. Spending a few weeks checking your generation data gives you a real picture of your system’s performance and helps you spot any issues early. The monthly generation chart quickly shows whether your real-world output matches what the calculator predicted.
10. The payback period assumes consistent operation
A three-to-five-year payback period assumes the system is running and generating throughout. If panels are not cleaned periodically, or if shading from a new fence or overgrown tree develops, output drops and the payback period extends. A quick physical check every few months and an occasional clean keeps the system performing as expected.