In order to increase the self-consumption of solar electricity generated by a residential photovoltaic system, an interesting solution is to equip the system with a
storage system

It allows the solar energy produced and not consumed during the day to be stored for use when needed, for example in the evening or early morning.

However, given the still rather high prices of this technology, it is advisable to be clear about a few aspects before purchasing this equipment, starting with an analysis of one’s own consumption profile.

Foreword

Producing their own energy is a choice that many people are making these days and there are many reasons for this.
The photovoltaic system produces, of course, when the sun shines, while the electricity consumption of many families is often concentrated in the evening hours, hence the choice to equip oneself with a storage system, but when is it really necessary?

Typically, the percentage of self-consumption from a PV system is around 30%, but with the integration of batteries it can reach 70%.

The very first advice is to contact a professional who, by outlining the consumption profile on a daily, monthly and annual basis, consulting the bills of the last 12 or 24 months (also considering the different consumption time slots, F1, F2-F3), will assess the most suitable solution based on specific and personal needs.

How does a storage system work?

Batteries automatically and intelligently manage all energy flows, i.e. they understand where to direct energy instantaneously from both an energy and an economic point of view.
both from an energy and economic point of view.

If I am, for example, producing more solar electricity than I consume at that moment, and that would normally be directed towards the grid, my system has to understand that it has to take this until the batteries are charged.

Houses equipped with a photovoltaic system have the potential to produce all or part of their own annual electricity needs.
However, solar energy production and domestic consumption are not simultaneous, resulting in an exchange of energy between the house and the grid.
Since the “Scambio sul Posto”, that is, the mechanism that transforms the energy fed into the grid into a saving on the bill, guarantees a much lower economic value than the energy absorbed by the PV system, it is important to reduce as much as possible the exchange of electricity from and to the grid and, therefore, energy storage can be an effective solution.
The surplus energy produced by the photovoltaic system during sunshine hours can be stored and used during the evening and night hours, thus minimising the energy exchanged with the grid.

What should be done?

First of all, be aware of your electricity consumption and manage those that can be shifted to daylight hours, to increase your own consumption and therefore your withdrawals from the grid, saving on your bill, you must act on the electrical loads of your home: focusing, when possible, on the simultaneity of solar production and consumption.