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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.
Residential solar electric systems on average, cost about $20,000, but Dave Stapleton, President of David Homes, said in western New York, state and federal subsidies cover about half the cost, bringing it down to about $10,000 in out-of-pocket costs. âRight now, itâs about the consumer making a choice.nce the solar array is up and running, Rizzo says that the general rule for commercial solar panels is that it will begin to pay for itself in three-to-five years. âSo you are hedging against future rate increases, and it is giving you the power to really take control of your overall electric usage,â he added.