What does 20GW means? If they install 40GW for the next 10 years, is that enough? That's about 1 nuclear power plant: https://www.eia.gov/tools/faqs/faq.cfm?

What does 20GW means? If they install 40GW for the next 10 years, is that enough? That's about 1 nuclear power plant: https://www.eia.gov/tools/faqs/faq.cfm?id=104&t=3 https://www.eia.gov/tools/faqs/faq.cfm?id=104&t=3