In any photovoltaic system, all the components must be related to each other, a large number of plates or a high-power inverter cannot be used for batteries that are too small, since if a relationship is not kept in proportion, the useful life of the batteries would be shortened, as well as the efficiency of the installation. In this post we will explain the details to take into account:
The amount of Solar Panels
The number of solar panels that we will demand in the installation will be dimensioned by the existing consumption in the same; that is, if the installation is going to be used throughout the year, we should cover the average consumption of a day in winter, since it is the time of year in which we will have the least amount of solar hours. If the installation is going to be carried out in a home for occasional use, for summer or weekends, we must cover the consumption for an average day between September and October in relation to solar hours. To calculate the number of panels, the peak solar hours (HSP) of the location, the technical characteristics of the panels to be installed and the losses that may occur in the installation must be taken into account.
Battery capacity for installation The energy stored in the batteries will not be enough for the installation if solar energy is not available. As we must not discharge them more than 30%, what we will do is multiply the daily consumption by 2, so that its capacity is thus doubled, with this we would have one day of autonomy, and we will multiply by the number of days of autonomy that is wish to obtain the necessary capacity in batteries. Batteries are usually designed for 3-4 days of autonomy, although this depends on the location where the installation is carried out, which would make us multiply the daily capacity by the number of days to have the necessary autonomy. Do not confuse power with energy Power: It is the instantaneous demand of an electrical device, and the result of the working voltage multiplied by the absorbed current. Energy: Consumption of an electrical device per unit of time. Example: A 2W light bulb on for 1 hour will consume 2Wh of energy The power of the inverter limits the maximum power in electrical devices that we can have connected in our installation. As with the electricity contract from the electricity company, if we exceed that power "the light will go off". In solar inverters, what happens is that the inverter stops to protect itself. All solar inverters allow power peaks of a few seconds from their nominal equipment power. This is used to start the most demanding loads such as motors or pumps. If you need more information, do not hesitate to contact us.
