StratoSolar
+1 408 821 7036
  • Home
  • Technology
    • Key Enabling Insights
    • PV Generation Platforms
    • Gravity Energy Storage
    • Communications Platform
    • Proven Technologies
    • Example Complete Energy Solution for the UK
    • Common Concerns >
      • Airspace
      • Hurricanes
      • FAQ
    • Gallery of Images >
      • Platform Shadow Videos
      • Japan Energy Solution Map
      • 2050 World Energy Sankey Diagram
      • 2050 Synthetic Fuel solution
      • 2050 Electricity solution
      • Climate Change Videos
  • Benefits
    • Low Cost Generation
    • Low Cost Energy Storage
    • Cost Reduction Roadmap
    • Sustainable and Scale-able
    • Zero Carbon
    • Energy Security
  • Contact Us
  • Blog
  • Login
    • Presentations
    • Gallery >
      • PV Documents >
        • PV Big Picture policy level document
        • PV California deployment
        • PV Japan deployment
        • PV UK deployment
        • Wind and Buoyancy Forces
  • Related Sites
  • Solve for x Videos

the renewable energy uphill climb to reduce cost

8/29/2019

Comments

 
Picture
Picture
The cost of renewable energy is a complex topic much clouded by  partisan posturing. Solar and wind based electricity generation have reduced dramatically in cost and will continue to do so. It’s become standard to see quotes in mainstream media reporting on the growing commitment to 100% renewable that assume that wind and solar are already cheaper electricity generation than fossil fuel based electricity generation. While this is true for small scale deployment it is not true for 100% deployment. As always, the devil is in the details. Because the fossil fuel and renewable sides are so polarized, they both pick facts to win their case rather than trying to be objective. 

The fossil fuel advocates simply want to kill renewables so their arguments are regarded as biased. There are others who advocate CO2 free alternatives like nuclear who don’t want to kill renewables but do want to point out their flaws. Stratosolar is in a similar position. Current renewables have serious flaws that only get exposed as renewables become a bigger percentage of generation. Advocates  for renewables see these arguments as a continuation of partisan posturing and ignore them. However there are real problems but so far there are few markets where renewables have a sufficient market share to prove the case and the problems won't be accepted until the case is proven and the problems cannot be denied. 

Much of the debate is theoretical and academic with lots of assumptions. California is the closest to demonstrating the real problems with real data. The two graphs shown in a previous post are California’s electricity generation from 2000 to 2017. California is a large market with significant renewable generation. Some simple observations can be made from these two charts. Yearly generation has remained nearly constant at around 200GWh. Capacity has increased from around 55GW to around 80GW as renewables were added. This little spreadsheet below shows how these numbers result in a capacity factor of 41% in 2000 reducing to 28% in 2017. This is the predicted consequence of renewables becoming a bigger percentage. Fossil fuel plants get used less as wind and solar are used more but the fossil fuel capacity has to remain to provide backup for when the wind does not blow and the sun does not shine. Capacity has capital costs that need to be repaid. Utilities have to raise prices to cover their costs, which is what has happened in California.

                         GW GWh        GW  GWh
gen capacity     55   482,130    80    701,280
gen                          200,000             200,000
Capacity factor         41.48%             28.52%

Renewable energy can claim a low cost of generation but the system overall costs more as a result of renewable intermittency. This results in higher electricity costs. Some renewable advocates think the existing generation redundancy covers renewable intermittency but this is not the case. California’s system was balanced at 41% capacity factor in 2000. To stay at 41% they would have had to reduce fossil fuel generation as they added renewable generation. This reduced fossil fuel capacity would not have been able to supply sufficient electricity when solar and wind were not generating. 

This focus on generation does not capture all the added costs as renewable penetration grows. At the relatively low penetration levels in California renewables sometimes produce too much electricity and generation has to be curtailed. This reduces renewable capacity factor and thus increases cost of generation. Also, additional transmission was added to the grid to connect wind and solar. This is a unique added expense as this transmission is only used for wind and solar. The reduced capacity factor and this added expense has significantly raised electricity prices in California. 

California is at stage one of renewables penetration.  As they continue to add capacity the capacity factor will reduce, producing rapidly rising electricity costs. Solar is about 18% penetration today. It will max out at about 25% when overall capacity factor might get to about 20%. So even at this low level while solar generation costs will continue to fall the falling capacity factor due to increased curtailment will offset this gain.The solution to enable continued expansion is storage. This is stage 2 of renewable expansion. So far there is little storage. There are two big issues. The first is simply getting storage that works, is low enough cost and can scale rapidly. The second is the added cost of electricity as storage additions are added in lockstep with generation additions. Even as generation costs continue to fall storage costs have to be added, keeping overall cost of electricity high. Storage is expensive and unlikely to cost reduce rapidly.

This brings us to stage three of renewables expansion. Costs remain high because even with storage, fossil fuel capacity still needs to be maintained to cover long duration intermittency which occurs about 20% of the time. Fossil fuel capacity cannot be removed until a long duration storage technology is viable. The most likely candidate is synthetic fuels. As well as just getting synthetic fuel plants developed, a big impediment is the cost of synthetic fuels will depend on the cost of electricity. If electricity costs remain high then synthetic fuels will be expensive which makes electricity from synthetic fuels even more expensive.

The current emphasis on 100% renewables is not based on a sober assessment of the technologies needed to achieve that goal. It is an aspirational goal presented as something that is already feasible. The status quo is fine for the incumbent renewables but is not reducing CO2 emissions and at current rates of penetration will not reduce CO2 emissions until long past the 2050 deadline. As with many subsidized industries the industry becomes dependant and has little incentive to change. New approaches that challenge the failing status quo are needed. Stratosolar is one such approach.

​By Edmund Kelly
Comments

    Ed Kelly

    President of StratoSolar

    View my profile on LinkedIn

    Archives

    February 2023
    November 2022
    October 2022
    July 2022
    June 2022
    May 2022
    April 2022
    March 2022
    February 2022
    January 2022
    December 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    March 2021
    January 2021
    November 2020
    August 2020
    July 2020
    June 2020
    February 2020
    December 2019
    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    April 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018
    February 2018
    January 2018
    December 2017
    November 2017
    October 2017
    September 2017
    August 2017
    June 2017
    May 2017
    April 2017
    March 2017
    February 2017
    January 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    April 2016
    February 2016
    January 2016
    December 2015
    November 2015
    October 2015
    September 2015
    August 2015
    July 2015
    June 2015
    May 2015
    April 2015
    March 2015
    February 2015
    January 2015
    December 2014
    November 2014
    October 2014
    September 2014
    August 2014
    July 2014
    May 2014
    April 2014
    March 2014
    February 2014
    January 2014
    December 2013
    November 2013
    October 2013
    September 2013
    August 2013
    July 2013
    June 2013
    May 2013
    April 2013
    March 2013
    January 2013
    December 2012
    November 2012
    October 2012
    September 2012
    August 2012
    July 2012
    June 2012
    May 2012
    April 2012
    March 2012
    February 2012
    December 2011
    November 2011
    October 2011
    September 2011
    August 2011
    July 2011
    June 2011
    May 2011
    November 2010

    Categories

    All
    All Energy
    Alternative Energy
    Bill Gates
    China
    Clean Energy Investment
    Clean Energy Price
    Desalination
    Developing World
    Energy
    Energy-investment
    Energy Policy
    Germany
    Helium
    Japan Energy Pv
    Land Use
    O3b
    Pv
    PV Bubble
    Pv Subsidies
    Stratosolar
    Us Subsidies
    Wireless Communications

    RSS Feed

 © 2023 StratoSolar Inc. All rights reserved. ​618 S. 8th Street, Suite 400B, Richmond, CA 94804
Contact Us