1. Store electrical energy.
Photovoltaic off-grid solar systems generate electricity when there is sunlight during the day, and the highest power generation is usually when the sun is at its highest point. But at noon, the demand for electricity is not high, and many users only use electricity at night. How to deal with the electricity generated during the day? To store energy first, this storage device is a battery. Wait until the peak electricity consumption period, such as 7 or 8 o'clock in the evening, use the electricity stored in the battery to release the electricity.
2. Provide stable working voltage and current.
Photovoltaic power generation is extremely unstable due to the influence of radiance. When a cloud comes, the power will be reduced immediately, and the load is not stable, such as air conditioners and refrigerators, which have a large starting power and usually run less power. If the photovoltaic is directly loaded, the system will be unstable and the voltage will fluctuate. The battery is a power balance device. When the photovoltaic power is greater than the load power, the controller sends the excess energy to the battery pack for storage. When the photovoltaic power cannot meet the load demand, the controller sends the battery power to the load.
If you do not require electricity to be used at night or in sunny weather such as cloudy and rainy days, then you can use a small-capacity battery to reduce equipment costs while stabilizing the voltage and load.
If you need to install solar power system for your house, please contact Sunflower Solar. We will provide you with professional configuration and suggestions.