Traditional grid-connected distributed photovoltaic systems are restricted by solar illumination conditions, with intermittent power generation characteristics. Power generation is sufficient in sunny days and insufficient at night or on rainy days, making it impossible to completely get rid of grid dependence. The combination of distributed PV systems and energy storage systems perfectly solves the intermittency problem of solar power generation, realizing full-cycle independent power supply, and bringing a more stable, reliable and intelligent power consumption experience for families, enterprises and remote areas.
The working principle of PV-storage integration is simple and efficient. The distributed PV module converts solar energy into electricity during the day. After meeting the real-time power consumption demand of users, the excess electricity is no longer fed into the grid but stored in the matching energy storage battery system. When the illumination is insufficient at night, on cloudy and rainy days, or during peak power consumption periods, the stored electric energy is released continuously to supply power for loads. This self-generation and self-storage power mode realizes closed-loop energy circulation, completely breaking the limitation of solar illumination time and realizing 24-hour stable clean power supply.
PV-storage integrated systems have extremely high application value in multiple scenarios. For urban families and commercial buildings, it can avoid power supply instability and power outage losses caused by grid transformation, line faults and peak power rationing, ensuring safe and stable power consumption. For remote mountainous areas, islands and rural areas with imperfect grid infrastructure, off-grid PV-storage systems can completely get rid of grid construction dependence, solve the problem of difficult power supply in remote areas, and provide stable power guarantee for local life and production. For industrial enterprises, energy storage systems can store excess photovoltaic power during low power consumption periods and release it during peak power consumption periods, avoiding high peak electricity prices and further reducing energy costs.
With the continuous progress of energy storage battery technology and the decline of costs, the popularity of PV-storage integrated distributed systems is increasing rapidly. Modern intelligent PV-storage systems are equipped with automatic energy management controllers, which can intelligently identify power generation, power consumption and energy storage status, automatically optimize energy distribution, and maximize energy utilization efficiency. In addition, the system has multiple protection functions such as overcharge, over-discharge, overload and short circuit, with high safety and stability. The integration of distributed PV and energy storage has opened a new era of independent clean energy supply, becoming the mainstream development direction of future distributed energy systems.
