2016-11 / SteadySat / Self-consumption


November 20th, 2016

Residential self-consumption

The software solutions allowing to maximize the self-consumption require to have access to forecasts of solar production. We have here the example of an individual house with a 3 kWc rooftop installation.

It is located on the slope of a mountain so that the sun is masked in winter very early in the afternoon. This is shown on the graphs with a steep production drop between 2.00 pm and 3.00 pm. The forecasts are anticipating very well this drop.

The day of November 20th is rather variable with some important cloudy spells. The morning is sunnier than anticipated the day before. Thus, the forecast of the day before is showing an important gap between the anticipated production and the actual between 9 am and 11 hours (see figure 1).

On the D day, the production forecasts are updated every 15 minutes based on satellite imagery. The SteadySat technology is correcting quite well this gap, as shown on figure 2. It is then possible to adjust the piloting of some loads (such as electrical devices, electrical floor heating or water heating) to take advantage of this surplus of production.

Figure 1: Actual (in blue) vs SteadyMet forecast (in red) of the day before

Figure 1: Actual (in blue) vs SteadyMet forecast (in red) of the day before

 

 Figure 2: Actual (in blue) vs SteadyMet forecast (in red) 30 minutes before

Figure 2: Actual (in blue) vs SteadySat forecast (in red) 30 minutes before