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Cooper had sent a letter to the Republican Party earlier in the day explaining that the convention would have to take place on a smaller scale with social distancing measures and mask-wearing due to recommendations from health authorities to stop the spread of the coronavirus.

Cost reduction does not mean producing products that don't last as long or perform as well as solar cells made elsewhere, but seeding a next generation of technology, identifying promising technology and scaling it up, he said.

Credit insurance is an effective tool to protect companies against non-payment risks caused by protracted default or insolvency of their buyers. It is commonly used by companies in Europe, and the usage rate can be as high as 30 percent in advanced countries such as France and Germany, according to the survey.

Consulting firm McKinsey based in the United States said in a report: "Companies that wish to provide electric vehicle fleet operators with charging services will need to look beyond existing business models. It may require an investor or a well-capitalized business to combine multiple entities into one with all the right capabilities, or complementary businesses to join forces in a partnership."

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