The cost of a solar generator can fluctuate contingent upon the size and power result of the unit. A small, portable solar generator may cost as little as $300, while a large, commercial-grade unit can cost upwards of $10,000. The typical expense of a solar generator is around $2,000. Solar generators are becoming increasingly popular as a means of generating renewable energy. Solar generators can be utilized to drive homes, organizations, and even vehicles. They are a clean and efficient way to generate electricity, and their costs have steadily dropped in recent years. The size and power output of a solar generator determine its cost.