| PHOTOVOLTAICS |
Photovoltaic (PV) systems convert sunlight to electricity through the use of specially designed silicon cells. The cells are assembled together into modules and the modules are connected together to form an array. An inverter is used to convert the DC electrical current output of the array to AC current that can be used to power standard electrical equipment. For off-grid or grid backup applications, the photovoltaic array is hooked up to battery storage. However, in many locations in Colorado the array can be connected to the electrical grid (a grid-tied system). The building uses the solar electricity when needed and sends excess energy to the grid for a credit on the electric bill.
Battery storage systems can be cost effective in locations that are not connected to the existing power grid because of the high cost of power-line extension. Battery systems are also used to ensure an uninterruptible power supply (UPS) on commercial and residential buildings. In these systems the occupant can buy electricity from the grid when the PVs don’t produce enough for the building needs or sell electricity to the utility company when the PV power exceeds the building needs.
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One of the most exciting PV applications for architects is “building-integrated photovoltaics (BIPVs). The integration of PVs into the architectural design is accomplished through the use of products such as roof shingles, exterior cladding, or skylights that have photovoltaics laminated to the exterior surface (known as thin-film technology). Using these products, some of the cost of the PVs is offset by the displacement of the traditional building material. Many large BIPV projects have been installed in Europe.
Costs of photovoltaic systems have dropped significantly over the last 20 years. Future incremental cost reductions will be accomplished through manufacturing innovations and higher production of panels and associated equipment. Some utility companies and governmental agencies offer rebates or buy-downs that reduce the cost as much as 25%. In some situations, the marketing benefits and the savings over time (lifecycle cost analysis) provide justification for the high initial cost..
power systems installed in Victoria and Southern NSW that attract a substantial Rebate from the Federal Government of up to $4000. This initiative aims to encourage the wider use of solar power.
Main reasons why people choose Solar Charge Grid connected power for their suburban home:
• Independence - generate your own power
• Lifestyle - choosing to reduce their dependence on fossil fuel
• Save $$$ - reduce power bills, add value to their home
• Interest - ‘l’ve always wanted to use solar power on my home’
• Concern - future of electricity pricing
• Protect - want to actively help the environment
• Popular - fastest growing use of solar power worldwide |
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