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Hi, I am a solar panel & battery installer in Perth & Peel area in western australia approved by CEC, NETCC, NECA. Ask for a production estimate with its assumptions written down, then measure year one against that figure to confirm the system is healthy. Skip pressure washers and harsh chemicals when cleaning panels, because a soft rinse is all the glass and frames ever need. A safety and performance check every few years covers isolators, cabling, roof penetrations and inverter health, and it keeps the warranty position clean. Between roughly six point six and ten kilowatts covers most Perth households, although pools, ducted cooling and EV charging push the ideal size higher. East and west orientations trade some midday peak for better morning and evening production, which often matches family routines better. If roof work is likely soon, design the array so sections can be removed and refitted without disturbing the rest of the installation. Before signing anything, ask how the installer handles service calls years later, since local support is what turns a good install into a long lived system. Timing heavy loads into the middle of the day lines up with generation and is the simplest way to lift self-consumption without spending money.
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