4 kW solar power station

How much energy does a 4 kW solar system generate?

A 4 kW solar panel system generates approximately 5,808 kWh of electricity each year. That’s enough to keep 106 TVs running, power 4 refrigerators, or meet the energy needs of a small household (the average U.S. shopper on EnergySage needs about 12 kW of solar). But what else could it do?

How much does a 4 kW solar panel cost?

A 4 kW solar panel system costs $11,200 in 2025 before incentives. A 4 kW solar panel system produces about 5,808 kWh of electricity annually, but the exact amount depends on where you live and how much sun you get. DIYing a 4 kW solar panel system usually isn't your best bet: You're much better off hiring a professional solar company.

How many solar panels are in a 4KW system?

The number of solar panels in a 4kW system depends on the size of the panels themselves. If you have a 400W panel, it will produce 400 watt-hours in standard test conditions, which includes a cell temperature of 25°C and solar irradiance of 1,000W per m², and is how every company checks a solar panel’s capabilities.

Is a 4KW solar panel system worth it?

A 4kW solar panel system is absolutely worth it, as long as it’s the correct size for your household. If it is, it’ll bring you various benefits. You’ll cut your electricity bills by 103%, on average, which means across a year you actually earn more than you spend.