The non-conventional energy sources that are being tapped are becoming increasingly important due to the limited availability of conventional sources such as coal, oil, and gas. Among these sources, solar power has the largest potential for various reasons.

1. Abundant Availability: Solar power is available in abundance and is the most abundant source of renewable energy on the planet. The sun is a virtually limitless source of energy that can be harnessed by solar panels.

2. Cost-Effective: Solar power has become increasingly cost-effective in recent years, with the cost of solar panels decreasing significantly. This has made solar power more accessible to people and businesses.

3. Easy to Install: Solar panels are easy to install and can be installed on rooftops or in open spaces. They require minimal maintenance and can last for many years.

4. Environmentally Friendly: Solar power is a clean and renewable source of energy that does not emit any harmful pollutants into the atmosphere. This makes it an environmentally friendly source of energy.

5. Versatile: Solar power can be used for a wide range of applications, from powering homes and businesses to powering cars and other vehicles.

6. Off-Grid Capabilities: Solar power can be used in off-grid areas where there is no access to electricity. This makes it an ideal source of energy for remote areas and developing countries.

In conclusion, solar power has the largest potential among the various non-conventional energy sources that are being tapped due to its abundant availability, cost-effectiveness, ease of installation, environmental friendliness, versatility, and off-grid capabilities.

Because Sun light is available every where for 12 hours in a day, and solar panels take very less space.