Capacities of all‑in‑one storage correspond to distinct scenarios. 5kWh: small apartments, basic household backup for fridge, lighting and router. 10kWh: regular residential solar storage for peak‑valley shifting. 16kWh: large houses and villas supporting air‑conditioners and EV chargers. ≥20kWh: small shops, farms and construction camps. Built‑in inverters support both on‑grid and off‑grid operation with solar panels. High integration reduces component procurement and compatibility failures. Distributed solar expansion keeps lifting market demand. Before purchase, calculate total load power, select proper capacity and check multi‑unit parallel function if future expansion is needed.