In what way can the cost of producing solar energy from CSP (Concentrating Solar Power) and HVDC (High Voltage Current Transmission) be lowered?

In what way can the cost of producing solar energy from CSP (Concentrating Solar Power) and HVDC (High Voltage Current Transmission) be lowered? 1. Keep plants small 2. Making the plants specifically for each site 3. Making solar collectors at a mass production scale 4. Directly, making more investors pay for the project 

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