Sizing Home Battery Storage
Home batteries store excess solar energy for use during evening and nighttime hours or during grid outages. Key sizing factors include daily evening/night usage (typically 50-70% of total), depth of discharge (DoD, usually 80-100% for lithium), and round-trip efficiency (85-95%). A typical home needs 10-20 kWh of usable storage. The nominal capacity must be larger than usable capacity to account for DoD limits.