100% Renewable Energy - Can We Do It?

Storage Challenges

Storing renewable energy presents significant challenges due to the intermittent nature of sources like wind and solar. Prof. David Connolly highlights the limitations of current battery technology, noting that the high cost of materials like lithium and copper makes it impractical to rely solely on batteries for energy storage 1. Instead, he suggests the need for a giant smart power grid that can efficiently distribute power across regions, compensating for fluctuations in renewable energy production 1.

You can't tell the solar panel to produce electricity when the sun doesn't shine.

--- Prof. David Connolly

Prof. Mark Delucchi adds that while hydropower can supplement energy needs, it alone cannot fulfill the demand, emphasizing the importance of innovative grid solutions 2.

   

Grid Management

Managing an energy grid powered by renewables involves complex challenges, particularly due to the variability of wind and solar power. Prof. Mark Delucchi discusses the need for backup systems to prevent blackouts, as models must accurately predict energy availability at all times 3. He notes that while a giant grid could theoretically connect renewable sources across the U.S., uncertainties in these models pose significant risks 3.

You simply cannot call upon wind and solar to be there whenever you need it.

--- Prof. David Connolly

Prof. David Connolly points out that countries like Denmark are expanding their definition of renewables to include biofuels, which could provide additional flexibility in grid management 4.