1. What is a photovoltaic energy storage system?1. 1 Definition of photovoltaic energy storagePhotovoltaic energy storage system, also known as solar photovoltaic energy storage system, is an important energy utilization method that combines solar photovoltaic power generation with energy storage technology. The system converts solar energy into electrical energy through photovoltaic panels and uses energy storage devices (such as battery packs) to store this electrical energy so that it can sup