A 1kW solar panel system generates 4 to 5 kWh of electricity daily, costs between $1,800 and $5,800 depending on battery inclusion, and requires 3 to 4 standard 300-watt panels. This entry-level solar setup delivers an 8- to 15-year payback period and powers essential household devices, including. Estimating the electricity generation from a 1kW solar panel system is essential for understanding its potential benefits, savings, and contribution to your energy requirements. But this doesn't mean it keeps on giving 1kW every hour of the day. The correct energy a 1kW solar panel produces depends on sunlight, panel quality, and several other conditions.