September 12 2020 the average cost of installed residential solar power systems is currently 2 60 per watt.
													
																	Prices of solar panels increasing. 
									
	
		
	
																	8 76 kw grid tied solar system with solaredge and 24 astronergy solar 365 watt panels. 
																	Medium 8 16kw system got a 400 price increase to 16 400 before incentives large 12 24kw system got a 1 100 price. 
																	Solar panel cost data 2020 updated. 
																	Changes in solar panel cost over time can be explained by swanson s law which states that the price of solar pv modules decreases by about 20 percent for every doubling in global solar capacity. 
															
													
									
	
		
	
																	Here are tesla s new prices for the bigger solar rooftop panel systems. 
																	This is higher than the average price of residential solar power systems across the united states which is currently 2 60 per watt.