Record the appliance, not just the room
List each appliance, quantity, rated power from its label and the hours you expect to use it. Add a photograph of an unclear label instead of guessing. Mark which loads must work during an outage.
Separate power from energy
Watts describe power. Watt-hours describe energy over time. A 60 W device used for 5 hours accounts for 300 Wh before system losses. Starting demand and simultaneous use still need a separate inverter assessment.
Bring your routine into the brief
- Which appliances run together?
- Which operate mainly in daylight?
- What must continue overnight?
- What existing equipment will remain?
Use the load-list tool to prepare your assessment. It organises information; it does not provide a final system size.