How compatible are batteries and storage systems?
Storage systems linked to electric batteries exist today. However, these are still very expensive, and their costs cannot be recouped over the entire life of the battery. It is therefore not yet worthwhile to undertake this type of investment at this time.
On the other hand, inverters sold today are compatible with the future installation of batteries. It may therefore be worth waiting a few years before considering the purchase of a battery for your existing photovoltaic system. Battery prices are falling sharply, so it's only a matter of time before they become profitable.