Usually, when you least expect it, there is a sudden power outage while cooking, browsing the internet, or watching your favorite movie. It is at such moments that photovoltaic systems with backup power functions come into play. Even during power outages, solar systems can ensure seamless energy supply, providing important energy support and reliability for households and businesses. Solar energy systems convert sunlight into electrical energy, providing electricity for various devices and appliances, and can continue to operate even in the event of traditional grid interruptions. During a power outage, solar energy systems operate by utilizing energy storage solutions such as lithium-ion or lead-acid batteries to ensure continuous power supply. Throughout the day, solar panels convert sunlight into direct current (DC) electricity, which is then stored in the batteries for later use. When the grid experiences an outage, the solar energy system automatically switches to using the stored energy to power essential loads in homes or businesses. This independent operation [...]