The all‑in‑one energy storage battery integrates LiFePO4 battery, inverter and BMS system. Common capacities include 5kWh, 10kWh, 16kWh and 20kWh, expandable via parallel connection . 5kWh suits emergency backup for small households; 10‑16kWh is mainstream for residential solar self‑consumption; above 20kWh applies to small commercial scenarios. It covers home solar storage, off‑grid villages, outdoor camps and store backup power. Pre‑wired and factory‑tested, it supports plug‑and‑play installation without complex component matching. Rising global residential storage demand is driven by backup power and peak‑valley arbitrage. When purchasing, verify usable capacity, output power, protection rating and certifications according to real‑world loads.