How many solar panels do I need for a 6.6 kW system? – Broadly, if you use 330 watts solar panels to get a 6.6 kW solar system you might need around 20 panels i.e., 20×330 watts. However, it depends upon various other factors. For example, a commercial solar installation Perth will differ from Brisbane because of the difference in the sunshine.
The output of a solar panel depends upon the availability of sunshine which varies by season. For example, a 6.6kw solar system Perth will differ from Sydney because the 6.6kW system generates 29.0kWh in Perth whereas it generates 25.7kWh in Sydney. For detail visit:

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