In california where the average system required is 4 23 kw solarreviews research data shows that the average solar panel installation cost as of jan 2020 is 2 78 per watt meaning the 4 23 kw system would be 11 753 before the solar tax credit and 8 701 after the federal tax credit.
													
																	Cost to have solar panels installed. 
									
	
		
	
																	Solar panel costs for an average sized installation in the u s. 
																	Most solar panels last for 50 years have a 25 year warranty and start generating a return on investment after 8 years. 
																	Explore solar panel installation services. 
																	Usually range from 11 144 to 14 696 after solar tax credits and the average price per watt for solar panels ranges from 2 51 to 3 31. 
															
													
									
	
		
	
																	They are custom based on the home roof type shading and utility. 
																	The average solar panel payback period is 7 to 12 years and solar energy saves 600 to 2 000 per year on electricity costs.