For new solar-storage builders, clarify three key factors: vertical LFP battery capacity, inverter rating and maximum allowable load. Small homes adopt 5–10kWh batteries matched with 3–6kW inverters; larger residences choose 15kWh and above. Continuous load cannot exceed inverter rated power, while peak load should stay within 120%–150% rating. Split vertical batteries offer high flexibility with freely selected inverters. All-in-one systems are plug-and-play and lower wiring cost. Applications include urban household backup, balcony PV storage and overseas off-grid housing. Calculate daily power consumption and required backup hours before purchase, compare split systems and integrated units to select the most cost-effective energy storage solution。