Overview
- The SOLIX Solarbank 4 Pro is a 5 kWh LiFePO4 home battery with an integrated inverter and AI energy manager, four MPPT inputs, up to 5,000 W PV input and fast backup switching under 20 ms.
- Multiple retailers are offering launch bundles that include the SOLIX 4 Pro, four 500 W bifacial modules, a smart meter and cabling for about €1,899 with coupon and payment‑method discounts that can cut the price further.
- German VDE rules clarified since December 2025 limit simplified plug‑in systems to roughly 800 VA inverter output with Schuko connections capped near 960 Wp and allow higher module peaks up to 2,000 Wp or more under Wieland or professional installation rules.
- Analysis and tests show system sizing matters: home&smart modelling finds 4 kW of modules drives roughly double the annual yield versus 2 kW and shortens amortisation from about 5.3 years to about 3.8 years, while a one‑year 960 Wp field test recorded 637 kWh and an estimated ~4.75‑year payback.
- Vendors are already marketing intermediate multi‑kilowatt packages such as 6,000 Wp sets that pair the SOLIX 4 Pro with large module arrays to serve higher‑consumption households and take advantage of recent VDE allowances for simplified registration.