The Future of Solar Pt 4

It is raining hard this week in Tokyo, and I have not seen the sun clearly once since I got back from a trip to the U.S. nine days ago.  Be that as it may, it is hard not to be optimistic about the future of solar, even in typhoon season. September is the month in Japan when it rains more than in the official "rainy season".

Technology and cost reduction march onward.

1. Last week, Kaneka, a Japanese company, announced a record 26.33% conversion efficiency for a "practical size" crystalline silicon solar PV cell.  Kaneka is targeting an LCOE of 14 yen/kWh in 2020 and 7 yen/kWh in 2030.  Kaneka's is a non-concentrating cell with "heterojunction technology using high-quality amorphous silicon, low resistance electrode technology, and a back-contact structure that captures more solar energy".  Nice to see Kaneka still in the game, since they are mostly known in the global industry for their earlier thin-film modules that faded when undercut dramatically by cost reductions for traditional crystalline PV modules within the past decade.

2. This is only the latest of MANY new records for cell and module efficiency this year.  Indeed, it is hard not to yawn a bit since we are so accustomed to seeing these.  The PV Magazine brief online article about Kaneka's feat also mentions or links to stories about

--Sunpower's module efficiency record of 24.1% set in June using cells from SunPower's X-Series modules.
--ZSW's 22.6% CISG thin film record from June.
--Trina's announcing in July 20.16% average efficiency for Trina's P-type multicrystalline silicon PERC cell under "industrially produced conditions" (as opposed to laboratory tests), allowing a 286w standard 60 cell module (as opposed to the 260 watt modules we were using only a year or two ago).
--Hanwha Q Cells' announcement of a 19.5% efficiency for a 72 cell module using standard multicrystalline silicon technology using its Q.UANTUM technology and four busbars.

3.  Of course, 7 yen/kWh LCOE might not be an aggressive enough target for 2030, even if 50% less than the Kaneka 2020 target.  We now see numerous PPA's in desert areas of the world for projects to be built in the 3~4 cent per kWh range.  (E.g. Peru - Enel Green Power 4.8 cents/kWh for construction in 2017, Coahuila Mexico 3.6 cents/kWh for construction in 2018, Dubai/Masdar 2.99 cents/kWh for construction 2019, and Chile, Solarpack, 2.91 cents/kWh, for construction 2019.)

... solar power takes up too much space?

This nice summary at a global level by Adair Turner notes that there is plenty of room for solar and wind power in most countries AND a low enough cost that "within 20 years many countries could get a majority of their electricity from renewable sources at an easily affordable price."  He notes that in a few countries with high population density (e.g. India, Bangladesh, S. Korea) we may need to add some nuclear and carbon recapture technologies to make a swift transition to a zero carbon economy. And some rich countries (Britain) may prefer to pay a bit more for electricity to place their wind farms offshore, for aesthetic reasons.

Japan (and Germany) are absent from the analysis.  Japan's population density (336 persons per square kilometer) is lower than S. Korea (507), India (407), Taiwan (647), Bangladesh (1119) and similar.  But like Britain Japan has a strong "NIMBY" tradition that allows localities to veto many types of developments.  So site availability will continue to be an issue for renewables in Japan.

Some ways around the issue:

Solar -- as much rooftop and BIPV as possible, on every new house and commercial or industrial structure!  Floating solar on ponds, reservoirs, etc.  Solar greenhouses.

Wind -- offshore with floating projects as they become commercially viable, and massive new capacity additions in Tohoku and Hokkaido with sufficient transmission capacity to get the power to demand centers in Kanto (and Kansai).

Portugal Runs for 4 days straight on 100% renewable energy

This report from the Guardian online.

"As recently as 2013, renewables provided only about 23% of Portugal's electricity.  By 2015 that figure had risen to 48%."  Hydro, wind and solar.  In February 2016 they were at 95% renewables.

And no, they did not build a lot of big new hydro dams in 2014 and 2015, nor did they cut their electricity usage in half!

And even if most of the increase in renewables is wind and solar, they did add 260MW to an existing hydro/pumped storage plant in January 2013 -- and storage allows them to use renewables to get to such a high percentage.

NY Times Editorial Board - "A Renewable Energy Boom"

When I was a regular reader of print newspapers back in the last century, I used to enjoy the pre-Murdock Wall Street Journal's editorial page.  They would propose sometimes audacious, outrageous things.  They would take crazy "conservative" positions.  Sometimes I felt as if my blood would boil.

The New York Times editorials ... not so much.

A typical NY Times editorial would expound that education is good; crime is bad; that we all should volunteer more to help our communities.  The NY Times editorial board would endorse proven, mainstream political candidates.  Yawn.

So when an April 4, 2016 New York Times editorial announces that we are entering a "renewable energy boom", citing a written-by-committee consensus UN report , you know that renewables are no longer a "fringe" source of energy.

Indeed, as the editorial notes, a majority of the generation added last year GLOBALLY was in renewables, more than half of total new renewables investment last year occurred in China, India and Brazil -- the big developing markets that will make or break efforts to control greenhouse gas emissions -- and renewables, including hydro, share of global electricity production has doubled from 2007 to 2015, while costs are dropping like a rock. By 2020, solar PV will be cheaper in India than new coal-fired generation.

(In such an environment what investor in his or her right mind would commit to a new coal-fired plant?)

These facts are now commonplace.  Governments and companies: ignore them at your peril.

P.S. If the UNEP (United Nations Environment Programme) is a bit suspect for the typical somewhat conservative U.S. senator or, say, Wall Street banker, how about Bloomberg?

A visit to World Smart Energy Week in Tokyo

Friday afternoon I visited World Smart Energy Week at the Tokyo Big Sight exhibition hall.  As in past recent years it is a huge event with hundreds (thousands?) of exhibition booths, and features solar, wind, biomass, fuel cells, battery technology, as well as an "energy market liberalization" exhibitions.  My impressions from a few hours spent greeting former business partners and walking the halls.

1.  Solar has not gone away in Japan.  In 2015, Japan continued to be the #2 market for solar PV in the world, and I recently saw a prediction for another 8GW of new installations in 2016, retaining at least the #3 position.  There is even SOME new greenfield development going on despite the difficulties of obtaining interconnection and the risk of curtailment.  And the solar exhibition remains by far the largest and most well attended, with a mood even on the last afternoon of the exhibition not at all glum.

The Kyocera exhibit had a feature on "floating solar" power plants which focused on the 1.7MW "nishi-ike" project in Takaoka that we developed for them, as well as trumpeting their 13MW project now underway. 

 2.  Solar PV technology just gets better and better, incrementally.  What would have been a 245 or 250 watt module back in 2011, is now a 300 watt module.  What would have been a 280 watt 72-cell module is now a 330 or 340 watt module, and it can be available as a bi-facial product so have actual output closer to that of a 400 watt mono-facial equivalent.  There are a wide range of approaches -- Sunpower high efficiency modules, PERC modules, 5-busbar models (instead of the old 3-busbar).  The First Solar "Tetrasun" module having 18~18.3% module efficiency is now on sale.  Solo Power Japan is actually selling its flexible, light weight CIGS modules that were barely out of the lab (and having trouble being commercialized) in 2013.

DSM, a Netherlands-based speciality chemical company, makes coatings and films for module.

All these things add up to a huge increase in output for the same project.

A Solo Power module -- rollable and this one weighs 2.1kgs - 90 watts ... can be glued onto a rooftop.

Solarworld bi-facial module. 72 cell 320 watt, but up to 400 watts production possible including reverse side, at a high albedo groundcover location.

3.  Microinverter manufacturers have been trying to get into Japan for years, without success.  But at PV Japan I met one company, NEP, that is actually selling its product in Japan. They told me that they are approved for use in the utilities, and their product is going onto a 315kWp floating solar project in Fukuoka that will be done this month.  This is a perfect solution to the issue of "where do we put the inverter" that inevitably comes up with floating solar projects in Japan -- the local authorities resist strongly any heavy equipment being located on the levy surrounding the pond.

4.  Floating offshore wind experiments continue.  The Fukushima national demonstration project is now nearing its next phase, with several different designs of floating offshore wind to be tested (including the Principle Power design as implemented by Mitsui Zosen).  It will not happen overnight, it it is great to imagine a future in 15 or 20 years when Japan could get massive electricity from a flotilla of offshore wind farms.

Nobody home at the USA Pavilion's Principle Power booth.
Maybe they are over at the Fukushima offshore wind project displays?

5.  Fuel Cells.  The hydrogen car is for real.   The Honda Clarity FCV will be available for sale from next week, joining Toyotas Mirai.  Nissan will follow soon.  Almost 75 hydrogen filling stations are in operation in Japan, with many more to follow.  The combined heat and power Enefarm home fuel cells are slowly getting better.  Lots of companies were exhibiting in this area. Kawasaki Heavy Industries had a nice pamphlet outlining all their activities related to this new business opportunity.

East Japan hydrogen fueling stations.

West Japan hydrogen fueling stations

6. Basic energy conservation gets featured at WSEW in the Eco House and Eco Buildings exhibition.  Glass wool insulation!  Better reflective/insulating paint coatings!  Some nice exhibits of companies taking the low cost way to lower CO2 output.

7. Electricity competition.  There were lots of exhibits by competitive suppliers and providers of monitoring, price comparison tools and a myriad of other things needed in a competitive retail market.  For the first time ever, I saw a TEPCO presence at one of these events, as TEPCO compares for competition in its own region and others.

New logo!  New TEPCO?  Lots of reasons to think so, actually.

Kinki Electric Power .... not to be confused with Kansai Electric Power.

Skipping Stone (consultants) were there as well.  

How to keep everyone on the grid and get to 80% renewables by 2030

It is good to be back after a long absence from this blog.

My last post was about how a combination of solar + storage is likely to lead to massive "grid defection" over the coming 15 years.

Now, a study that suggests another way things MIGHT go.

A study published in the leading scientific journal Nature (and available online at the link) indicates that, for little or no net increase in the levelized cost of electricity, it would be possible to get the U.S.A. to 80% renewables by 2030.  How? A significant investment in the transmission grid, including new very high capacity, low loss, long distance DC (direct current) transmission.  The study looks at renewable generation and potential generation using detailed weather data, and concludes that even though sun and wind resources are intermittent and variable locally, across the U.S. as a whole the amount of electricity that can be generated by renewables at any one time is remarkably steady.

So, the authors suggest, the key is a grid that has sufficient capacity and resiliency to get the electricity from where it is produced at any time to where it would be consumed.  A huge undertaking ... but one that costs no more than building and fueling the traditional generation the nation will need if this is not done.

Incredible.