Solarfy Solo 455 vs EcoFlow STREAM: Which Newly-Listed Kit Should You Buy?

Open the live ENA compliant devices registry this week and you'll see a new name at the top: Solarfy Ltd, with a system reference of SOLAW/21640/V1 — the Solarfy Solo 455 Plug-in Solar Kit. It passed G98 type testing and went live on the register on 25 September 2026, sitting above a run of entries from Worldwide Solar's various Hoymiles and VaySunic combinations.

A brand-new entrant is worth a second look, if only to check it isn't a corner-cutting rush job. So how does the Solo 455 actually compare against the plug-in kit most UK buyers already know — EcoFlow's STREAM range?

What the Solarfy Solo 455 actually is

The ENA listing itself is sparse — no comments field, no compatible-panel notes, just a bare "Inverter" category entry rated at 0.455 kW. That capacity is the giveaway: at 455W, the Solo 455 sits well under the 800VA/3.5A regulatory cap that SI 2026 No. 848 sets for plug-in microgenerators, which suggests a single-panel setup rather than the twin-panel 600–800W configurations most competitors ship.

That's a deliberate, conservative choice. A smaller inverter draws less attention from a DNO reviewing your G98 notification, and a single panel is easier to mount on a narrow balcony rail or a small garden fence panel. The trade-off is obvious too: less capacity means less annual generation and a longer payback.

Being new to the register, Solarfy doesn't yet have the track record, UK retail presence, or app ecosystem that EcoFlow has built up. There's no confirmed UK price yet, no listed retailer, and no public warranty terms beyond what appears on the ENA database. Being G98-compliant is a necessary condition for a legal plug-in solar kit — it isn't sufficient evidence of build quality, support, or real-world reliability.

EcoFlow STREAM: the known quantity

EcoFlow's STREAM range is the closest thing the UK plug-in solar market has to an established, reviewed, retail-ready product line. We've covered the base STREAM kit in detail and compared the 800W STREAM against STREAM Ultra elsewhere — the short version is a 600–800W micro-inverter system with a genuinely good monitoring app, a 10-year inverter warranty, and an upgrade path into EcoFlow's DELTA battery range.

At 600–800W, STREAM sits close to the regulatory ceiling, which means more annual generation than a 455W kit — typically 500–650 kWh a year on a south-facing install, worth roughly £120–£160 a year against Ofgem's current price cap of around 24.5p/kWh.

Side-by-side comparison

For most buyers, the deciding factor isn't the ENA listing — both are compliant — it's everything the ENA listing doesn't tell you: price, support, retailer availability, and real-world reliability data. Solarfy may well turn into a solid budget option once retailers pick it up, but as of today there's simply less to go on.

Why the registry matters here

This is exactly the situation the ENA compliance registry exists for. Dozens of small manufacturers — Worldwide Solar's various Hoymiles/VaySunic/AIKO combinations chief among them — are adding new SKUs to the register on an almost daily basis. Being on the list confirms the inverter passed G98 testing; it says nothing about whether the seller will still be trading in two years, whether spare parts exist, or whether the app (if there is one) actually works.

Before buying any newly-listed kit, cross-check it against the live registry to confirm the reference number matches what the retailer is advertising, and read our guide on spotting a non-compliant plug-in solar kit — sellers occasionally list kits that were compliant under an earlier hardware revision but not the one they're currently shipping.

Which should you buy?

If you want a kit you can buy today, from a retailer, with an app, a warranty and an upgrade path, EcoFlow's STREAM range remains the safer choice — see our full buying guide to the best plug-in solar kits for how it stacks up against Anker and the rest of the field, and our roundup of which UK retailers stock plug-in solar.

If your budget is tight and you don't need battery expansion, it's worth keeping an eye on the Solarfy Solo 455 as it (hopefully) reaches UK retail. A 455W single-panel kit is a genuinely useful size for a narrow balcony where an 800W twin-panel kit won't physically fit, and if Solarfy prices it well below STREAM it could become a legitimate budget pick. We'll update this comparison once pricing, a retailer, and real-world reviews appear — for now, treat "newly ENA-listed" as a starting point for research, not a reason to buy on day one.

Is the Solarfy Solo 455 legal to install in the UK?

Yes — it appears on the ENA compliant devices registry with a passed G98 type test, which is the legal requirement under SI 2026 No. 848 for plug-in microgenerators. You'll still need to notify your DNO before switching it on.

Why is the Solarfy Solo 455 rated lower than most other kits?

At 455W it's below the more common 600–800W configurations from EcoFlow and Anker, likely reflecting a single-panel design rather than a limitation of the underlying micro-inverter, which sits comfortably under the 800VA/3.5A regulatory cap.

Where can I check if a new kit is genuinely compliant?

Search the manufacturer and model against our live ENA registry page, which syncs from the official Energy Networks Association database daily.