A practical guide to calculating daily kWh, battery size, and panel wattage.
Start with a load inventory. List every appliance you want to run, its wattage, and its daily hours of use. Multiply wattage by hours to get daily watt-hours. Sum across appliances to get your total daily consumption. Then size your battery to cover at least one day of autonomy (two is better), size your panels to recharge the battery in one sunny day, and size your inverter to cover peak simultaneous load.
