Slide show showing National Renewable Energy Lab Study on integration of 80% renewable energy in national grid.

2. Portrayal of generation stack in 2050 for 4 days in summer peak load and 4 days in spring of
lowest load showing how various generation types contribute, with 80% renewable generation.

3. Closeup of previous figure.

4. Closeup of figure 2 slides
earlier.
Note the large curtailment
of wind energy each day.

5. Chart showing the increased cost of retail electricity due to integration of 80% renewables. The
current study’s projection is the gray region that projects a $38 per Megawatt hour increase in
2050. Current national retail cost of electricity is approximately $120 per Megawatt hour.
This projection shows that the cost of integrating 80% renewable energy into the power
grid is quite reasonable (and this is without major decreases in cost such as from improved
photo-voltaic solar panels).