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Our Solar Electric Systems
An off-grid path to energy independence!
Components:
Solar Photovoltaic (PV) Modules Photovoltaic modules, often called solar panels, are wired together and installed in groups. A group of modules is called a solar array. When the sun shines on a solar array, direct current (DC) electricity is produced and stored in a bank of batteries. PV modules can be mounted on a south-facing roof, at ground level or mounted on a pole. Batteries The batteries used in a solar electric system are specialized, designed to store the electricity produced by your solar array. The size and number of batteries used in your system depends on your reserve and power requirements. Stored DC current from the batteries is converted into AC house current by an inverter. Batteries are normally stored in a battery box or cabinet in a utility room. The battery box is properly vented to allow any gases emitted while charging to escape. Inverter The inverter converts the DC power stored in the batteries into household current. Power is distributed, via the circuit breaker box, to the lights and appliances inside your home. The household current produced by the inverter is the same, if not cleaner than, utility power. Generator Most off-grid power systems in Maine include a propane or diesel generator as part of the system. The generator charges the batteries when there is a shortage of sunlight. It also provides additional power automatically when necessary. Charge Controller The charge controller controls the flow of power from the solar array to the battery bank. The charge controller automatically regulates the charge going to the batteries preventing battery damage due to overcharging. Meters Charge controllers have built in meters to instantly confirm the charging process. The meters make it easy to track how much power is being used and how much power is still available, similar to the fuel gauge in your car.
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