1kw solar system price Saint Helena

The current cost per watt of solar panel systems in St. Helena, CA in September, 2024 is $3.12/W.. The current cost per watt of solar panel systems in St. Helena, CA in September, 2024 is $3.12/W.. As of December 2024, the average solar panel cost in Saint Helena, CA is $2.56/W. If you install a 5 kW system it will cost you between $10,872 to $14,710, with an average cost of $12,791. [pdf]