Small solar systems have many advantages, such as:

1. Clean energy: Small solar systems do not produce pollutants and harmful gases, which is beneficial to the environment and air quality.

2. Long lifespan: Solar panels have a long lifespan and are relatively simple to use. Maintenance costs are also lower.

3. Easy to upgrade and expand: The small solar system can be easily upgraded and expanded to meet different needs.

4. Small size and light weight: the small solar system is small in size and light in weight, it can be easily carried and moved, and it is very convenient to use.

5. Simple operation: The small solar system is relatively simple to use, and does not require complicated technical knowledge and professional equipment.

6. Wide range of applications: small solar energy systems can meet some relatively simple power needs, such as charging, lighting, communication, etc.

7. Affordable: While some initial investment may be required, small solar systems can save significant energy bills over time.

In conclusion, the small solar system is an environmentally friendly, affordable, easy-to-use and widely applicable clean energy system.