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Although there is no average size commercial solar system, prices start from Â£4000 + VAT for a 4kW setup made up of 16 panels & grid connection. Adding a Tesla battery storage system will store excess energy during the day when grid costs are higher, for use on-demand later in the day or night.
The cost of solar depends on the size of your house. The average residential system is 5 kW and the current average price per watt is $4, so an average 5 kW system would cost $20,000.our quote will vary. If a 5 kw system costs $20,000 before rebates, the CPS Energy residential rebate would bring this cost down to $13,200. After the 30 percent tax credit is applied to the remaining balance, the final cost would be $9,240.