Plug-in Solar Kit + 300W Pop Up Solar Panels
Key Features:
- G98 UK grid-compliant EcoFlow STREAM Microinverter Microinverter, 800W AC rated
- 10-year warranty on the EcoFlow STREAM
- IP67 weatherproof microinverter, activates from just 3W of solar input
- Works with 99% of solar panels via MC4 connectors
- Two Excel Power 150W pop-up solar panels, monocrystalline silicon
- Up to 22% cell efficiency
- 4.8kg per panel, folds to 665 x 530 x 27mm for storage
- IP67 weatherproof panels with adjustable kickstands
- Compatible with most portable power stations
300W Plug-in Solar Panel Kit with Pop-Up Panels
This plug-in solar panel kit pairs the 800W-rated EcoFlow STREAM Microinverter with two 150W Excel Power pop-up solar panels. The kit is fully compliant with UK G98 grid connection regulations and suits UK homeowners cutting bills under the recent plug-in solar rules, plus caravan, workshop and off-grid users.
What are plug-in solar panels?
Plug-in solar panels are compact solar kits made up of panels, a microinverter and a cable. The kit feeds electricity into your home’s existing circuit without a rooftop installation, or runs caravans and workshops off-grid via a portable power station. BS 7671 Amendment 4, published on 15 April 2026, allows UK plug-in solar up to 800W AC output.
How plug-in solar panels work
Plug-in solar panels generate DC electricity from sunlight, a microinverter converts that DC into 230V AC, and the AC power feeds your home’s existing circuit or a portable power station. Your appliances draw solar power first, and the grid fills the gap when demand exceeds what the panels produce.
Here is the 300W kit working step by step:
- Sunlight hits the panels: the two Excel Power 150W panels convert photons to DC electricity, with up to 22% cell efficiency per panel.
- The microinverter converts the signal: the EcoFlow STREAM takes the DC input (up to 65V) and outputs 230V AC at UK grid frequency, rated up to 800W.
Your home uses solar first: the AC output feeds your consumer unit. Any appliance running during daylight draws from the solar supply before pulling from the grid. - The grid fills the gap: if the panels produce 250W and your fridge and laptop need 400W, the grid supplies the remaining 150W. Your meter records only the grid portion.
- Anti-islanding keeps you compliant: the STREAM shuts off automatically during a power cut, protecting grid engineers working on the line. This is a G98 and G99 requirement for all UK grid-tied solar.
Running the kit off-grid
The same Excel Power panels work with most portable power stations via their MC4 connectors. Plug the panels into an EcoFlow, Jackery, Bluetti or Anker unit, and the kit charges the battery rather than feeding a home circuit. This setup suits caravans, campervans, garden workshops, allotments and off-grid cabins, where no DNO notification or electrician is needed because no grid connection exists.
How much could the 300W plug-in solar kit save you?
A 300W plug-in solar kit generates roughly 250 to 300 kWh per year in the UK, depending on panel position, shading and local weather. At a UK electricity price of 27p per kWh, that cuts £65 to £80 a year off your bill. The kit pays back in around 4 to 5 years, and the EcoFlow STREAM Microinverter carries a 10-year warranty, so the 300W plug-in solar kit keeps earning for at least 5 years after payback.
What drives savings on the 300W plug-in solar kit
- When you use electricity: the 300W plug-in solar kit generates during daylight, so households running appliances in the day save more. Timed dishwasher, washing machine, or tumble dryer cycles lift self-consumption.
- Panel position: the Excel Power 150W panels generate the most when south-facing, with a 30 to 35-degree tilt. East or west-facing cuts output by 15 to 20%.
- Shading: partial shade on one Excel Power panel cuts output disproportionately. The EcoFlow STREAM Microinverter uses two MPPT channels to limit losses when only one panel is shaded.
- Electricity tariff: savings scale with your unit rate. At 30p per kWh instead of 27p, the annual saving rises by £7 to £9.
Value of the 300W plug-in solar kit for off-grid users
For caravan, workshop and off-grid setups, the 300W plug-in solar kit replaces petrol for a generator, campsite hook-up fees, or a second leisure battery. A weekend at a non-electric campsite saves £15 to £25 in hook-up fees. The 300W panel input recharges a 1kWh portable power station in 4 to 5 hours of good sun, which covers lighting, fridge and device charging for a full day.
Installing the 300W plug-in solar kit in the UK
A qualified electrician installs the 300W plug-in solar kit by hard-wiring the EcoFlow STREAM Microinverter into your consumer unit. The hard-wired route is BS 7671 compliant and the EcoFlow STREAM holds UK grid connection approval. Your electrician also files the G98 notification to your District Network Operator within 28 days of commissioning, as the system sits well within the 3.68kW G98 threshold for small-scale installations. For off-grid, caravan and workshop use, no electrician or DNO notification is needed: the Excel Power panels plug straight into a compatible portable power station via MC4 connectors.
FAQs: 300w Plug in Solar Kit
Yes, plug-in solar is legal in the UK. BS 7671 Amendment 4 was published on 15 April 2026 and allows sub-800W plug-in solar systems to connect to UK homes. The final government approval for 800W plug-and-socket kits is expected in July 2026. Technically until then, compliant installation is via a hard-wired connection to your consumer unit by a qualified electrician but plug-in solutions will be available before then ready for the rules change. The government has confirmed this will be legal by the summer of 2026.
Yes, for grid-tied use, a qualified electrician installs the 300W plug-in solar kit by hard-wiring the EcoFlow STREAM Microinverter into your consumer unit. For off-grid, caravan or workshop use, no electrician is needed: the Excel Power panels plug straight into a compatible portable power station.
Yes, for grid-tied installation, your electrician files a G98 notification with your District Network Operator within 28 days of commissioning. G98 is a connect-and-notify process, not an approval process. Off-grid use needs no DNO notification because there is no grid connection.
The 800W cap protects existing UK household wiring from overheating when solar generation feeds back into the circuit. 800W matches the German standard, which has covered over one million plug-in solar installations safely. The EcoFlow STREAM Microinverter in this kit is rated at 800W, sitting exactly at the UK cap.
Yes, the EcoFlow STREAM Microinverter is rated at 800W, so the 300W kit has 500W of panel input headroom. You can add more MC4-compatible solar panels later without replacing the microinverter. The STREAM has two MPPT channels, each accepting up to 600W, so panel expansion is straightforward.
Yes, the Excel Power 150W pop-up panels connect to most portable power stations via MC4 connectors. For caravan, campervan, boat and off-grid use, the panels charge a compatible EcoFlow, Jackery, Bluetti or Anker power station. 300W of solar input recharges a 1kWh power station in 4 to 5 hours of good sun.
