Anker SOLIX RS40P Kit
The Anker SOLIX RS40P is the plug-in solar kit for UK buyers who want solid, proven hardware at a slightly lower price point than EcoFlow, with the convenience of Amazon delivery and returns. Two 400W monocrystalline panels, a compact RS40 microinverter, mounting kit, and a UK plug cable. The SOLIX ecosystem is mature — Anker has been making power products for years and the RS40P benefits from that engineering history. It's not as shiny as the EcoFlow STREAM but it does the job reliably and costs noticeably less.
Pros
- Typically £50–£80 cheaper than the EcoFlow STREAM for comparable output
- Amazon Prime delivery and returns make buying and returning risk-free
- RS40 microinverter is compact and proven across European balcony solar markets
- UKCA certified and BS 7671 Amendment 4 compliant
- Anker's build quality reputation carries over — panels and cabling feel robust
- Compatible with Anker SOLIX Solarbank for storage if you want to expand later
Cons
- App is functional but less polished than EcoFlow — UI feels more utilitarian than consumer-friendly
- Panels are monofacial, not bifacial — slightly lower output in reflected-light install situations
- UK-specific customer support is thinner than EcoFlow's — most support routes go through Amazon or Anker's international channels
- No battery option in the RS40P line — you'd need to step up to the SOLIX Solarbank system for storage
Anker isn't a solar brand in the way EcoFlow positions itself. It's a consumer electronics company that makes excellent charging hardware and has extended that engineering competence into home energy. The SOLIX RS40P is a solid, unfussy plug-in solar kit that does what it says, costs a bit less than the benchmark EcoFlow, and comes with all the purchase confidence of Amazon Prime behind it.
What you get
Two 400W monocrystalline panels, the RS40 microinverter, a mounting frame, all cabling, and a UK 3-pin plug lead. The RS40 microinverter is a compact unit that clips onto the panel frame — no separate box, clean install. Panels are monofacial rather than bifacial, which means you lose a small amount of the reflected-light generation benefit, but in practice the difference in a typical UK garden or balcony install is modest.
The system peaks at 800W combined and in a south-facing UK install should generate 580–720kWh annually depending on your location and orientation. Wales and the south-west sit at the lower end of that range for irradiance, the south and east of England at the higher end.
Installation
The install experience is very similar to EcoFlow's — MC4 panel connectors, microinverter mounted to frame, cable to plug. Anker's mounting hardware is straightforward for balcony rail installs and the included adjustable brackets handle most common railing widths. For flat roof or ground installs you'll need Anker's optional tilt frame, which is available on Amazon separately.
One thing worth noting: Anker's instruction manual is clearer than most in this category. Step-by-step diagrams, torque specs for the frame bolts, and a QR code linking to a setup video. Small detail, but it makes a difference if this is your first time handling solar hardware.
Monitoring
The Anker app connects to the RS40 microinverter over Wi-Fi and provides real-time generation data, daily totals, and estimated savings. It's functional and accurate but the interface is more utilitarian than EcoFlow's — less visual, fewer at-a-glance insights. If you're the type who checks energy stats obsessively, EcoFlow has the better app. If you just want to know the system's running and how much it generated today, Anker's app does that fine.
The financial case
At roughly £419–£449 depending on current Amazon pricing, the Anker SOLIX RS40P saves you £50–£80 upfront versus the EcoFlow STREAM. With similar annual generation, you're looking at payback in around two and a half years at standard tariff rates — marginally faster than EcoFlow. The Amazon purchase route also means you can return it within 30 days if it's not working as expected, which is a meaningful risk reduction for a first-time solar buyer.
The verdict
The Anker SOLIX RS40P is the sensible choice if you want proven plug-in solar hardware at a lower price, with Amazon's purchase infrastructure behind it. It's not as visually refined as the EcoFlow STREAM and the app is less impressive, but the hardware itself is solid and the savings are functionally identical. For budget-conscious buyers who'd rather save £60 now and spend it on a longer cable, this is the one.
