Split energy storage separates battery, inverter and BMS as independent units. Users can select components separately and assemble them on‑site. It supports independent upgrade for inverters or batteries and is ideal for retrofitting existing solar systems. Defective parts can be replaced individually to cut cost, yet installation requires higher technical skills.

All‑in‑one storage integrates inverter, battery pack and BMS inside one cabinet. Pre‑tested at factory, it features simple wiring and fast commissioning. System coordination and troubleshooting are convenient for new‑build houses. However, expansion capacity is limited, and single‑component failure may affect the whole unit. Users shall make choices based on future expansion plans.