Stored kilowatt-hours only pay back if the house uses them at night · review
An AC-coupled all-in-one balcony storage system with three MPPT trackers taking 2700 Wp, a 1600 W output, expansion to four packs, and integration with dynamic electricity pricing.
The bottom line The most capable balcony system in this family and the one that names other makers’ equipment rather than only its own. It publishes a string arrangement, a tariff strategy and three trackers — and not a single cycle figure for a battery that is meant to cycle every day.
An AC-coupled all-in-one unit aimed at households that already generate and want to stop exporting.
It names other people’s equipment. Shelly 3EM Pro and Eco Tracker are listed as compatible smart meters, which is a statement a maker can be held to. And the seventh bullet gives the string arrangement explicitly: three inputs, each taking two 450 Wp panels in series, for 2700 Wp total.
The fifth and sixth bullets describe charging when the exchange price is low and discharging at peaks, with an AI control mode reading the local price. That is the actual use case for this class of product, and it is described rather than implied.
No cycle count. On a unit whose value comes from cycling daily against a tariff, the number of cycles it will survive is the figure that decides whether the arithmetic works over ten years, and it does not appear.
Two bullets quote annual savings — one to the euro — without a tariff, a consumption or a generation figure behind them. They are projections and they are not carried into the specification lines above.
German, Italian and Spanish Amazon stores quoted 448 € to 459 € when this page was compiled.
British and French Amazon catalogues carry an entry for it, with nobody selling.
American Amazon store returned nothing at all, so the buy button there runs a search instead of landing on an empty page.
These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.
Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.
| Usable capacity | Nowhere in the listing — 1600 Wh base and up to 8 kWh maximum are published as capacity |
|---|---|
| Charge and discharge power | 1600 W output, first and second bullets; the charge rate is not published separately |
| Chemistry | LiFePO4, second bullet |
| Cycle life | Nowhere in the listing — no cycle count appears in any bullet |
| Inverter compatibility | AC-coupled, second and fourth bullets, and able to charge from surplus roof PV through a smart meter; Shelly 3EM Pro and Eco Tracker are named |
| Published metering | Smart meter integration is named by model, and the seventh bullet gives the solar arrangement as 3 × 2 × 450 Wp in series |
| Amazon reference | B0GKF4BBR7 (same reference on 5 Amazon marketplaces) |
| EAN | 0732133488485 |
It means the unit connects on the mains side rather than between panels and inverter, so it can absorb surplus that an existing roof installation would otherwise export. The fourth bullet describes exactly that, and it is why third-party smart meter compatibility matters on this product.
No. Wp is a panel rating measured under standard test conditions; it describes what may be connected on the solar side. The output here is 1600 W, and the two numbers describe opposite ends of the unit.
1.92 kWh nominal · 2800 W solar across 4 MPPT · 1200–2300 W on two AC ports · LFP, 6000 cycles · IP65 · down to −20 °C · 26 cm wide
An AC-coupled 1.92 kWh LFP unit with four MPPT trackers taking 2800 W of solar, two mains ports rated 1200 to 2300 W, IP65 and stated operation to −20 °C.
Best for: A narrow indoor space beside an existing balcony installation, where four panel groups need managing separately.
≈ €549
1.92 kWh nominal, up to 11.52 kWh · AC-coupled · bidirectional DC/AC efficiency 96.5 % · AC round-trip efficiency 86 % · app control
An AC-coupled 1.92 kWh battery expandable to 11.52 kWh whose listing publishes both a conversion efficiency and a round-trip efficiency — the only one in this family that does.
Best for: Someone comparing storage on what a stored kilowatt-hour costs rather than on headline capacity.
≈ €545
1600 Wh base, expandable to 9.6 kWh · 2 MPPT, 1200 W solar (600 W per tracker) · 6000 cycles · IP65 · down to −20 °C · 10-year warranty
A balcony storage unit with two MPPT trackers taking 1200 W of solar, expandable to 9.6 kWh with five further packs, rated IP65 and stated to operate down to −20 °C.
Best for: A balcony with panels facing two different directions, where per-tracker limits matter more than total capacity.
≈ €399
