The cost of a 1-kilowatt (kW) solar panel system can vary significantly based on several factors such as the quality of the panels, installation costs, location, government incentives, and any additional equipment required, like inverters or batteries.

As of my last update in January 2022, the average cost of a 1 kW solar panel system could range from $2,000 to $4,000 USD. However, prices may have changed since then due to market fluctuations, technological advancements, and changes in government policies.

It’s essential to obtain quotes from multiple reputable solar installation companies to get a more accurate idea of the current costs in your specific location. Factors like local incentives or rebates can also impact the overall cost.