Solar photovoltaic (PV) modules convert sunlight directly to electricity, which can be used in many ways, connected to a utility grid or standing alone. The price of PV modules in recent years has dropped dramatically, and can be an economically viable choice in many cases.

The solar electric panels that most folks are familiar with are technically referred to as photovoltaic or PV modules. Each module is comprised of photovoltaic cells, typically 5 or 6 inches square. The cells are commercially linked together to make weather-proof units: the solar module. Modules are then mounted and connected together electrically on the installation site to construct arrays. An array can include from a few modules to hundreds or thousands, depending on whether it is a small residential array or a large commercial array.

Today, quality commercial cells are over 20% efficient and experimental cells have attained 43.5 % efficiency and are still climbing. This trend bodes well for the future.

Solar PV performs very well in many applications. It can be used on-grid and off-grid, or even on a recreational vehicle. Each system is unique and has different installation and equipment requirements to maximize the power output from your investment. Systems with batteries add versatility but cost more and require additional components like charge controllers. Solar PV produces direct current (DC) which needs to be converted to alternating current (AC) if you intend to run standard appliances and electronics like TVs, computers or radios or would like to sell your electricity back to the public grid. This requires a quality pure sine wave inverter. The system will also require safety features like grounding, lightening evasion, and continuous follow-up. If some of this sounds daunting or confusing, the professionals at GTC can help clear things up and provide any level of assistance you desire.

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