This guide walks you through a practical, scalable solar and battery storage system that can keep your household running for a full 72 hours, starting with what you need to know and ending with an actionable checklist you can use today. Home emergency power storage should be sized from essential loads, not whole-house habits. For a 72-hour outage, prioritize medical devices, refrigeration, communications, lighting, internet or alarm equipment, then add each load's watts × run hours ÷ 1,000. This does not mean that a major blackout is expected. Choose reliable backup sources like generators. Available in three different capacities and with integrated emergency power function, the VARTA element backup is the ideal energy storage system for those who like to independent and well secured during emergencies.