EcoFlow is one of the most recognised names in plug-in solar, and for good reason. The company has sold over a million plug-in solar systems across Europe, was named as an official UK government partner for the plug-in solar rollout in March 2026, and currently offers the most complete range of DIY solar kits available to UK buyers. Whether you want a simple two-panel starter kit or a whole-home solar network with integrated battery storage, EcoFlow has a product for it.
This guide covers the full EcoFlow plug-in solar range available in the UK — what each product does, what it costs, and crucially, where each one currently sits in terms of UK legal compliance.
Legal status as of April 2026: BS 7671 Amendment 4 came into force on 15 April 2026, formally recognising plug-in solar in UK wiring regulations. However, the BSI product certification standard — which approves specific kits for true plug-and-socket connection in UK homes — is not expected until around July 2026. Until then, the fully compliant UK installation route is a hardwired connection by a CPS-registered electrician. EcoFlow is positioned to be among the first brands certified once the standard is published.
Why EcoFlow?
There are plenty of plug-in solar brands — Hoymiles, Anker SOLIX, Zendure, and Bosswerk among them. EcoFlow stands out for three reasons. First, their ecosystem is genuinely integrated: panels, inverters, batteries, smart plugs, and an AI-powered app all work together seamlessly. Second, they have been explicitly named by the UK government as a partner for the domestic rollout, which suggests their certification path is well advanced. Third, their product range is the most modular available — you can start small and expand without replacing anything you’ve already bought.
The one downside worth noting upfront: EcoFlow’s micro-inverter warranty is 5 years, compared to 10–12 years offered by Hoymiles and Anker. For a long-term investment, that’s a meaningful difference.
The EcoFlow plug-in solar range explained
EcoFlow now offers two distinct product lines for plug-in solar: the older PowerStream system, and the newer STREAM series. Understanding the difference is key to buying the right thing.
EcoFlow PowerStream 800W — the proven workhorse
Price: From ~£499 (inverter only) · ~£699–£899 (with 2 panels) · ~£1,200–£1,500 (with Delta 2 battery)
Output: 800W | MPPT channels: 2 | Warranty: 5 years
The PowerStream is EcoFlow’s original plug-in solar micro-inverter and remains their most proven product. It’s roughly the size of a hardback book, mounts behind or near your panels, and converts DC solar electricity into mains-frequency AC. A smart meter clamp (included) attaches to your electricity meter cable and tells the inverter exactly how much power your home is drawing at any moment — the system then matches its output to your consumption, avoiding waste and preventing unnecessary export.
The PowerStream’s standout feature is its battery integration. It connects directly to EcoFlow’s Delta 2, Delta 2 Max, and River 2 series portable power stations, turning them into solar batteries. When your panels generate more than you’re using, the surplus charges the battery. After dark, the battery discharges to cover your base load — your fridge, router, and standby devices running on stored solar overnight.
EcoFlow STREAM 800W Microinverter Kit — best entry-level value
Price: ~£499 (panels + inverter bundle) · ~£129 (microinverter only)
Output: 800W | MPPT channels: 2 | Battery: None built-in (expandable later)
The STREAM base kit strips things back to essentials — two 400W panels and an 800W microinverter for around £499. No battery, no AI features, just clean solar power feeding straight into your home. The microinverter alone is available separately for around £129, making it an excellent option if you already have compatible panels. This is the variant expected to be sold through Lidl and Iceland when the retail rollout begins later in 2026.
EcoFlow STREAM Ultra / STREAM Pro — all-in-one with built-in battery
Price: ~£949 (panels + inverter + battery bundle) · STREAM AC Pro from ~£798 standalone
Battery: 1.92 kWh LiFePO4 built-in | MPPT channels: 4 | Solar input: Up to 2,000W | AC output: 1,200W | Rating: IP65 weatherproof
The STREAM Ultra is where EcoFlow’s offering gets genuinely impressive. It combines a 1.92 kWh LiFePO4 battery with a built-in microinverter in a single fanless, weatherproof unit. Four MPPT channels handle up to 2,000W of solar input — enough for four 500W panels. The battery stores surplus generation during the day and discharges it in the evening, maximising the proportion of your own solar you actually use.
Pair two units and you get 2,300W of output and 3.84 kWh of storage. Scale to six units and you have a 7.2 kW output and 11.52 kWh of storage — a serious whole-home solar plant built entirely from plug-in components.
EcoFlow STREAM AC Pro — add storage to any existing system
Price: ~£798 standalone
Battery: 1.92 kWh LiFePO4 | Output: 800W | Coupling: AC — works with any microinverter
The AC Pro is the battery-only variant — no solar input ports of its own. It connects to any existing microinverter (EcoFlow, Hoymiles, Bosswerk, or others) via your wall sockets and adds 1.92 kWh of storage to whatever system you already have. If you’ve bought a Hoymiles-based DIY kit and now want to add storage, this is the product. It’s AC-coupled, meaning installation is as simple as plugging it in — no rewiring required.
EcoFlow range at a glance
| Product | Battery | Max output | Price (approx) | Best for |
|---|---|---|---|---|
| PowerStream 800W + panels | Optional (Delta 2) | 800W | £699–£899 | Proven starter kit |
| STREAM 800W kit | None built-in | 800W | ~£499 | Best value entry point |
| STREAM Ultra / Pro | 1.92 kWh built-in | 1,200W | ~£949 | All-in-one with storage |
| STREAM AC Pro | 1.92 kWh built-in | 800W | ~£798 | Adding storage to existing kit |
| Full 6-unit STREAM system | Up to 11.52 kWh | 7,200W | £4,500+ | Whole-home solar plant |
How the integrated battery system works
The battery integration in the STREAM series fundamentally changes the economics of plug-in solar. Without a battery, a plug-in system only saves you money when you’re at home using electricity during daylight hours. If you’re out 9–5, most of your solar generation goes unused. A battery captures that surplus and makes it available in the evening when you’re actually home and using power.
The STREAM system uses an AI-powered app to optimise when the battery charges and discharges. It monitors your consumption patterns, checks solar forecasts, and — if you’re on a time-of-use tariff like Octopus Go — can charge the battery from the grid overnight at cheap-rate electricity (as low as 7.5p/kWh) and use that stored power during peak evening hours (30p+/kWh). That tariff arbitrage alone can add £200–£300 per year in savings on top of your solar generation.
Battery chemistry note: All STREAM series batteries use LiFePO4 (lithium iron phosphate) chemistry, rated for 6,000 cycles. Charged once daily, that equates to roughly 16 years of use. LiFePO4 is significantly safer and more thermally stable than the older NMC chemistry — and in 2026, virtually every quality home battery uses it.
What about UK legal compliance?
EcoFlow’s products are already widely sold and used across Europe, complying with VDE safety standards and local grid connection rules. In the UK, the situation is still evolving.
BS 7671 Amendment 4 — which formally recognises small-scale plug-in generation in UK domestic wiring — took effect on 15 April 2026. This is the legal foundation that makes plug-in solar possible. However, the separate BSI product standard — which certifies specific devices for the UK market — is still expected around July 2026. European CE marks and German VDE certification don’t automatically transfer to the UK post-Brexit.
EcoFlow, as a named UK government partner, is well positioned to be among the first brands to receive UK certification when the standard arrives. Until then, the fully compliant route is installation via a hardwired connection to your consumer unit by a CPS-registered electrician — typically £250–£450 on top of the kit price.
The important point: the electricity savings are identical whether you install via a plug socket or a hardwired connection. If you want to start generating now with a fully above-board system, the hardwired route gives you that today. When plug-and-socket certification arrives later in 2026, EcoFlow’s systems will be among the first to qualify.
Is EcoFlow the right choice for you?
EcoFlow is our top recommendation for most UK buyers who want a complete, well-supported plug-in solar system with a clear upgrade path. The STREAM 800W kit at around £499 is the best entry-level value on the UK market right now. The STREAM Ultra is the best all-in-one solution if you want battery storage from day one. And the PowerStream remains an excellent, proven option if you already own an EcoFlow Delta or River battery and want to put it to work generating solar electricity.
The 5-year micro-inverter warranty is the main caveat. If long warranty coverage is your priority, Anker SOLIX (10 years) or a Hoymiles-based DIY build (12 years) may suit you better. But for overall ecosystem quality, app features, government backing, and breadth of choice, EcoFlow leads the field in the UK right now.
We’ll update this article when EcoFlow’s UK-certified products are officially confirmed. Watch this space for late summer 2026.