Large terrace PV arrays deliver high power and abundant surplus electricity, matched with 12–20kWh high-capacity floor-standing storage. Industrial-grade LiFePO4 cells and high-precision BMS ensure stable, safe long-duration high-power charge and discharge without damaging balcony PV panels. The fully sealed unit features dust and water resistance against long-term outdoor terrace exposure, with a sturdy anti-vibration integrated floor design. It stores full PV output by day to run whole-house appliances, central air conditioning and even small commercial devices overnight, and excess power can be grid-connected optionally. It suits integrated PV & storage renovation for multi-story villas and large self-built houses to maximize clean energy utilization.