For grid-connected systems, use 1-3 lithium-ion batteries with at least 10 kWh capacity. Always consider daily energy production, peak usage, battery capacity, and depth of discharge to ensure proper sizing. . Power and energy requirements are different: Your battery must handle both daily energy consumption (kWh) and peak power demands (kW). A home using 30 kWh daily might need 8-12 kW of instantaneous power when multiple appliances run simultaneously. For example, if your home uses 30 kWh daily, your battery. . So, it's essential to determine exactly how big of a system you need. Continuous power is the maximum wattage the inverter can handle over an extended period, while surge/peak power refers to the brief higher wattage it can provide. . In this guide, we'll walk you through the key steps to calculate the right solar battery storage sizing for your home, using your energy usage and solar production as the foundation.