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Solar PV & Wind Turbine - Balance of System Components
Be it a nice sized solar array or wind turbine high upon a tower, you still need to get that renewable power into a usable format. That means cabling/wiring, fuses, batteries, controllers, inverters, switches, disconnects, meters, etc.
It is important to avoid excessive loss of power from voltage drop in the wire, from the source (wind generator or solar panels) to the controller/inverter. It is not necessary to use a wire size that minimizes voltage drop for the maximum generator output as this thick cable could be very expensive. Better to choose a wire size that gives a 2% voltage drop, for the average generator output. If the cost of wiring is excessive, you may want to look at turbines that output power in AC. You then convert it to DC just before connecting to the battery controller. Sending the AC power directly to the grid may also be an option of you have a feed-in tariff or net-metering arrangement with your electrical power provider.
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