Overview
- Several retailers and specialist vendors have launched steep promotions on complete plug‑and‑play kits that pair four 500 W bifacial panels with integrated batteries, with recent advertised prices ranging roughly from €885 plus shipping to about €1,364–€1,379 and a €1,307 Kleines Kraftwerk/Anker bundle.
- Vendors use 'overprovisioning' by selling module arrays above 800 W so the inverter hits the 800 W feed‑in cap for more hours and excess solar is stored in onboard batteries for evening use.
- Independent tests and reviews single out Anker SOLIX 3, Solakon ONE and EcoFlow STREAM Ultra as top storage choices and recommend roughly 2–3 kWh of battery for an 800 W‑equivalent system to materially raise self‑consumption.
- Publishers note real examples showing an 800 W system can produce about 750 kWh per year and that storage raises the share of self‑used power, shortening payback to roughly 2–4 years under favorable conditions at current electricity prices.
- Buyers are advised to register kits in the Marktstammdatenregister, check component compatibility and warranties, and factor in shipping, mounting and site limits such as available space and shading before buying.