The photovoltaic system battery is used to accumulate all the energy produced by photovoltaic panels and make it available in case of blackouts, power surges or short circuits, ie during all those situations in which wind and sun are not able to power electrical devices. It can also be said that the battery is the critical element in any off-grid photovoltaic system. But which are the most efficient batteries for installing a photovoltaic system? And what characteristics must the batteries have to ensure optimum energy efficiency?

Batteries for photovoltaic systems: what are the main features

To ensure maximum energy efficiency, as well as system security, the photovoltaic system battery must have a low self-discharge, a high storage capacity, a high resistance to powerful charge / discharge cycles, ie it must be in able to withstand the charges and discharges, considering that during the day they are recharged by the panels, while at night they are discharged from the loads connected to it, and endure the temperatures too high and too low. On the market there are various types of batteries for photovoltaic systems including lead / acid or gel, with an average life of between 3 and 5 years.

Types of photovoltaic system

But what exactly is a photovoltaic system? And how many types do they exist? A photovoltaic system is an electrical system formed by photovoltaic panels that exploit the energy of the sun for the production of electricity. There are essentially two types of photovoltaic systems, ie island plants and systems connected to the network. The island photovoltaic systems, also called stand-alone, are not connected to any network and exploit the energy produced and stored in their own battery, or batteries. On the other hand, grid-connected photovoltaic systems, also known as grid-connected, are connected to an alternating current distribution network but enter all or most of their electricity production through the photovoltaic system.

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