Generation RENEW:  Not Yet Ready For Summer’s End 


It’s the end of August, and many have just returned from the beach. If you’re like us, at some point you’ve stood in awe of the ocean’s power. Whether it was simply looking at the waves or positioning your beach chair to avoid (or maximize) exposure to the changing tides. In addition to the inevitable existential questions this imagery provokes, perhaps it also made you wonder if there is a way to harness what is yet another example of nature’s power.



The answer is yes!  Tidal energy has been around for over a thousand years, as there are documented records of Europeans using tidal flows to operate grain mills. In 1966 France constructed the Rance Tidal Power Station, a 240-megawatt (MW) facility that uses turbine technology akin to wind. In 2011 South Korea constructed the Sihwa Lake Tidal Power Station, a 245 MW facility that is currently the world’s largest. Unfortunately, that brings us to today. Tidal energy has not received the groundswell of support that wind and solar has, and therefore has not benefited from economies of scale or generally the focus of the wider engineering community.


Source:  National Geographic


Let’s first talk about the cons. The two tidal energy facilities discussed above have an operating capacity factor of 25%*.  This would put tidal energy slightly better than solar power, and worse than wind. Generally speaking, lower capacity factors weigh on the economics of renewable energy projects as higher capacity factors make generation more cost competitive relative to other forms of energy. Separately, the environmental impact of tidal energy is also significant. The silt these structures attract alters the seafloor, while a wide variety of wildlife (animals AND plants) rely on the tides as part of their daily and full life cycle. There are legitimate fears that tidal energy can devastate wildlife. Finally, the timing of the tides shifts slightly every day, meaning that only certain days the tides would be aligned with peak demand.

* – Capacity factor is the measure of how often a power plant runs for a specific period of time, typically actual electricity output divided by maximum possible output.


Source:  Eagle Global Advisors


What about the “pros”?  It’s obviously renewable, and very predictable. It may not be timed perfectly as we discussed above, but we know exactly when the tides arrive. There are days or weeks where wind and solar underperform, but the tide is as regular as Cheers’ Norm. There are also studies that suggest the capacity factor for tidal energy can be materially higher if the facility is sited correctly. Earth Science 101 shows the further away from the equator you get the more drastic the tides. For example, Florida’s tidal range is roughly four feet on average, while Maine’s tidal range is roughly ten feet on average. So, while locations are limited, there are regions with significant tidal energy potential. Separately, the “energy density” of tidal energy is materially higher than other forms of renewable energy, meaning it can generate significant power even at slow speeds. It is also relatively inexpensive to maintain and can play a positive role in controlling damaging surge tides on unrelated onshore assets.


Source:  MDPI


To date there isn’t a perfect, cost-efficient renewable resource. Our quick analysis of tidal energy is no exception. The truth is each region has its own natural advantages, so while tidal energy may not be for Florida it could play a meaningful role in Maine, Alaska, Canada, or Scandinavia. The conclusion is yet again there are many roads through energy transition to a cleaner future, and there is no definitive answer to the “how we get there” question.

Or maybe like many others we simply want to prolong our vacation in the waning days of summer by talking about the beach one more time. Anything for a little more “summer wind”.




RENEW Performance Tracker 

Source:  Bloomberg.  *Please review disclosure information at the end of this post.


Renewables Roundup


*No Warranties. The accuracy and/or completeness of any Eagle Global Advisors index, any data included therein, or any data from which it is based is not guaranteed by Eagle Global Advisors, and it shall have no liability for any errors, omissions, or interruptions therein. Eagle Global Advisors makes no warranties, express or implied, as to results to be obtained from use of information provided by Eagle Global Advisors and used in this service, and Eagle Global Advisors expressly disclaim all warranties of suitability with respect thereto.

You Must Make Your Own Investment Decision. It is not possible to invest directly in an index. Index performance does not reflect the deduction of any fees or expenses. Past performance is not a guarantee of future returns. You should not make a decision to invest in any investment fund or other vehicle based on the statements set forth in this document, and are advised to make an investment in any investment fund or other vehicle only after carefully evaluating the risks associated with investment in the investment fund, as detailed in the offering memorandum or similar document prepared by or on behalf of the issuer. This document does not contain, and does not purport to contain, the level of detail necessary to give sufficient basis to an investment decision. The addition, removal, or inclusion of a security in any Eagle Global Advisors index is not a recommendation to buy, sell, or hold that security, nor is it investment advice.

Contact Us


Michael Cerasoli, CFA

Michael leads the Renewables effort at Eagle Global Advisors, including the development of active and passive strategies, and portfolio management. He is also the Co-Head of the Energy Infrastructure team and Co-Chair of the Energy Infrastructure Investment Committee.  He shares Portfolio Manager responsibilities for the firm’s four separate Energy Infrastructure strategies. Prior to joining Eagle in May 2014 Michael was employed by Goldman, Sachs & Co. for ten years where he covered Midstream for seven years and small/mid cap Oil Services for three.  Prior to Goldman, Michael worked for three years as a sell-side equity trader at various Wall Street firms. He earned bachelor’s degrees in Economics and History from Union College, and an MBA from the Hagan School of Business at Iona College. Michael holds the Chartered Financial Analyst designation.


Curt Pabst

Curt is a Managing Director in the Energy Infrastructure Business, a member of the Energy Infrastructure Investment Committee, and co-head of the Renewable Energy Business at Eagle Global. Prior to joining Eagle, Curt held a similar position at an Midstream Energy-dedicated asset management firm in Dallas, Texas. He has 39 years of investment experience. He has served as a partner/principal in both a hedge fund of funds and a venture capital fund. Curt earned his BA in Economics from Grinnell College and a professional certification in Energy Innovation and Emerging Technologies from Stanford University.



(713) 952-3550