Overview:

Product Description:

The first step in designing a PV system is to quantify the electric demand needed to be satisfied.  Depending on the system option chosen the previous section, an appliance-specific interactive sizing spreadsheet is available here, or previous electricity invoices may be used to estimate quarterly and yearly electricity consumption in retrofits. This approach will not be as useful if new appliances, energy sources or renovations are involved. If referring to utilities invoices, including power consumed (kWh) at each tariff rate is critical, as it is the same electricity sold at differing rates. e.g. In Queensland, Energex has a 3-tiered rate for household power. Tariff 11, 31, and 33 are priced differently and are listed separately on the invoice. The total power consumed at each rate (kWh) is additive.

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