Quick answer: Most Perth homes should aim for a DC-to-AC ratio of roughly 1.2 to 1.3 — meaning about 20–30% more panel capacity (kW) than the inverter's rated AC output. For example, a 6.6kW panel array typically pairs well with a 5kW inverter, which also happens to be the exact threshold for standard eligibility under WA's Distributed Energy Buyback Scheme (DEBS). The right size...
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