• Current: 20 Amps
• But we need to know Voltage to calculate Power (Wattage).

Power (Watts) = Voltage (V) × Current (A)

For a typical home:

• If it’s running on 120V, the power = 120V × 20A = 2,400 Watts (2.4 kW)
• If on 240V, then power = 240V × 20A = 4,800 Watts (4.8 kW)

So, the house needs a solar system that can generate about 2.4 kW or 4.8 kW, depending on voltage.

Assume:

• Each solar panel produces ~ 300–400 watts
• Sunlight availability: ~ 4–6 hours/day of peak sunlight (depends on location)

Example for a 2.4 kW system:

• Required panels = 2400W ÷ 350W ≈ 7 panels

Example for a 4.8 kW system:

• Required panels = 4800W ÷ 350W ≈ 14 panels

Other System Components Needed

Based on the voltage level you can design number of panels in series and parallel connections to meet your required rate of current and voltage .