Firstly, you may want to research different types of mini solar systems that are suitable for balconies. There are various types of solar systems available in the market, including portable solar panels, solar-powered lights, and small solar generators.

Once you have decided on the type of solar system you want to purchase, you can search for retailers that sell them. You may want to check online marketplaces such as Amazon or other online stores that specialize in solar products. Additionally, you can check with your local home improvement store or a solar energy company for options available.

It is essential to compare the features, specifications, and prices of different products before making a purchase. Consider factors such as the solar system's capacity, the size of the panels, the durability, and warranty offered. You may also want to read customer reviews to determine the product's reliability and performance.

Finally, make sure you understand the installation process and any maintenance requirements for the mini solar system. It is advisable to follow the manufacturer's instructions to ensure proper installation and optimal performance of the system.

Remember to do thorough research and buy from a reputable retailer to ensure you get a quality mini solar system for your balcony.