How many GW CAN a power plant produce?

A power plant rated at 1GW can produce 1GW of power, at the rated conditions. If it has an efficiency of 20%, then it will be consuming 5GW of energy in some form to do that. If the power plant is (say) thermal steam, then the calculations are fairly easy, because we can assume that it can do this continuously, as long as fuel arrives.

How much solar power does a 1 GW plant produce?

Solar power is rated a little differently, but again its rating is its electrical output under optimum conditions, so a 1 GW plant (with 20% efficient solar cells) is intercepting 5GW of sunlight and producing 1 GW of power. That means, 200GW capacity will produce 200GWh in one really good hour.

How much energy will a rated power plant produce?

I now understand efficiency is irrelevant to knowing just how much energy will be generated given capacity. A power plant rated at 1GW can produce 1GW of power, at the rated conditions. If it has an efficiency of 20%, then it will be consuming 5GW of energy in some form to do that.

Is Tesla planning a giant energy storage system with PG&E?

Tesla’s massive project to deploy 1GWh of Megapacks to create a giant energy storage system in California with PG&E has received approval from the local authorities. We first learned of the project at PG&E’s Moss Landing substation when they submitted it to CPUC and the company was in talks with Tesla in 2017.

How much power will a 200GW power plant produce in one hour?

That means, 200GW capacity will produce 200GWh in one really good hour. But that's not the whole story, because that 200GW capacity doesn't reflect the power you'll get all day every day.