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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.
equipment cost 45 % panels roughly 30 % of a residential grade solar system s cost is in the panels themselves which can run around $ 4500 to $ 12000 power inverter an inverter converts dc to ac power so you can connect to the grid and costs between $ 1000 to $ 3000