As we saw earlier, consumption is a key element for the purpose of sizing the photovoltaic system, provided, however, that the user does not drastically alter their behavior in relation to energy consumption. Let me explain. In the case of a households is to be avoided, for example, the temptation to leave the lights on day and night, only because it has become energy independent.
As in the case of a user industry, management should communicate if your strategy includes development plans, the purchase of new machines, installing new production lines is necessary, in fact, that such information be forwarded to the consultant who will make the size, to allow an assessment, or suspected, the increase in consumption that will result.
Finally, the size of a plant is obtained by performing a trivial division. Once obtained from the annual consumption bills, divide them for the ability of sunlight on the site in which to install the photovoltaic system.
We do this calculation together. Imagine you are in any region of central Italy and we want to install a solar system in Latin America. The theoretical annual energy capability is estimated to be about 1400 kWh / kW. Assume that your annual consumption is approximately 3600 kWh. We just have to divide 3600 kWh to 1400 kWh / kW. We get a value of 2.57 kW. The nominal power plant installed on your available space should therefore be 2.57 kWp.
course, 2.57 kWp is a purely theoretical to coincide with the actual value will be realized only if in reality the optimal conditions (exposure to SUD, lack of shading, inclination 30 °), in reference to which was calculated theoretical annual energy capability.
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