Define Essential Loads
Before selecting equipment, list the appliances that must run during outages or off-grid operation. Lighting, refrigeration, communications, pumps, and selected outlets are common priorities.
Choose Battery Capacity
For many 4-bedroom homes, 10kWh to 20kWh is a practical starting range. The exact size depends on climate, appliance usage, and how many backup hours are required.
Use Compatible Components
Battery, inverter, solar array, protection devices, and monitoring should be designed as one system. Compatibility reduces commissioning problems and service calls.