This deserves a serious answer.

Germany started in a terrible place for renewable energy action. It's not very windy, it's not sunny, it's quite densely populated and heavily industrialised.
I remember my parents in the UK worrying about milk and mushrooms because of events in far-off Ukraine. I don't blame Germans for saying no to nuclear in the late 1980s-90s. It wasn't the right decision, but you can't exactly dismiss their fears as unreasonable.
Germany could have gone the climate denier path to protect its interests.

But it didn't. It tried - at substantial financial cost - to do something new and amazing: to run a modern economy on renewables. It's hard to overstress how ambitious that was in 2004.
Today, it averages 48% renewables. The plan is to go further, to get to 100%, and we have no reason to think that plan will fail just because it isn't complete.

If a big, industrial, developed nation without much hydro can do that, there are few excuses for climate inaction.
German leadership has been consistently in favour of international action, willing to set itself targets and supporting policy. It hasn't even gone protectionist (generally Germany is a pro-free-trade voice in the European Commission, albeit not for entirely altruistic reasons).
If Germany hadn't done that, the option of cheap renewables might not be on the table today. And however you feel about nuclear, the option of cheaper renewables is a good thing. So, I'll drink to German leadership, because I honestly can't believe how far it has brought us.
*Goes back to afternoon occupation of trying to adjust heatpump settings by reading the manual, which is of course in German*

Still a bloody difficult language though.
Also, for anyone responding that Germans and German policy this last 20 years haven't been perfect: give yourself a golden star and congratulate yourself on your own consistently perfect decisions. Which - for me anyway - include doing Twitter on a Sunday, so there's a thing.
I am off to play with the two year old. She currently identifies as a bear and can play Jenga, hide-and-seek and a game of her own invention called "I Farted", which leads to literal roflmao.

I will have an alcoholic drink.

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More from @solar_chase

27 Nov
Important clarification on the Swiss 2050 Net Zero study/plan: it's no *net* electricity imports. So, Switzerland will export electricity in summer and import in winter. (Fine, but all north Europe will be planning the same...).

newsd.admin.ch/newsd/message/…
It hangs a lot of hope on "steeply tilted PV and facades", letting us generate 32% of our electricity from solar in winter halfyear.

Hmmm. Parts of Switzerland have much clearer skies in winter than my foggy valley, but that's still a lot of winter sun being assumed.
However you tilt the panels, you do need sunlight to generate electricity.

It does seem to have assumed massive expansion of rooftop solar just because nobody minds rooftop solar and there's space. Which is valid. I struggle to believe there is such tiny wind potential though.
Read 6 tweets
30 Oct
The @IEA says solar is king. Worth noting we @BloombergNEF say "wind retakes the lead from solar" because (very basically) with more granular modelling, wind electricity is just more useful at high penetrations. Blows in the early morning, in winter, etc.

about.bnef.com/new-energy-out…
I mean, we of Team Solar @BloombergNEF say "well next year we'll have a lower capex forecast and a slightly higher capacity factor figure assuming bifacial modules, so GAME ON" but that may not actually change the result here.
The global result also depends a lot on how sunny countries do economically. The model generally prefers to build solar, rather than wind, in relatively non-seasonal climates and those with lots of aircon.
Read 10 tweets
18 Oct
1. Time to make minor updates to my annual “opinions on #solar” thread.
If you like these, you’ll like my 2019 book, Solar Power Finance Without the Jargon. Five stars on Amazon, apparently “entertaining” and writer knows her stuff”. Also available here: tinyurl.com/y6lc3ohl
2. Solar Power Finance Without the Jargon is the book I should have read before seeking a job in renewables, from the perspective of having worked in this for 14 years.

Link to 2019 thread. 2018 and 2017 are linked so you can see what I got wrong. tinyurl.com/y56zx5qc
3. To the opinions! Solar manufacturing is still a terrible business to be in, though 2020 is better than many years. Competition is vicious and the newest factories have the best technology. Older manufacturers carry heavy debt for factories rapidly becoming obsolete.
Read 40 tweets
10 Sep
About 80% of U.S. gas open cycle gas turbines for peak power ran below 15% capacity factor in 2019, according to my colleague @YayoiSekine 's note, and about 60% never ran for more than 6 consecutive hours last year.

(Paywalled but bnef.com/insights/23449 )
Anyway that seems to be the main reason there's 8.9GW of PV with storage in the U.S. pipeline by 2023, and 69GW in the interconnection queue (basically hoping for a grid connection).

First you replace the peakers, and then you come for the CCGTs.
This observation brought to you because I am speaking at @Solarmedialtd 's Solar and Storage Co-Location Virtual Summit on Sep 24-25, and figured I'd better learn something about solar + storage.

There is more of it than I thought there was.

…ital.colocation.solarenergyevents.com
Read 4 tweets
15 May
Although I don't agree with much of this analysis, it is right that solar will be incredibly cheap, and thought-provoking.

(I think the fundamentals of applying learning curve analysis to a LCOE are slightly dodgy, and 30% is too high a rate even for capex).
Specifically, I'm a little concerned that a lot of the falls in cost of capital, O&M cost and non-module cost over the last decade have been one-offs. Cost of capital has dropped worldwide for everything, for example.
Our definition of a normal utility-scale PV project has gone from 1MW to at least 50MW, and there aren't that many places where you can just whack down a GW plant, so typical system sizes will cap out. Cleaning panels and mowing vegetation is more and more of the LCOE.
Read 6 tweets
12 Apr
Easter weekend holiday has been lovely. I finally got to do some jobs I wanted done.

These included cleaning the windows. Since I am proud to be a trained window cleaning professional, here follows a short thread on how to clean windows quickly and well. (1/n)
You really need: a good squeegee with a rubber (not plastic) blade. Once the rubber degrades, replace it (this will be decades in household use).
An old towel or rag
Sponge
A "scrim" cloth. A baby muslin or worn linen dish towel will do fine as this.
A bucket helps a lot (2/n)
First use the towel to wipe off spiderwebs, which leave grease marks otherwise.

Use water with a bit of washing-up liquid and an optional splash of vinegar. Soap up one window with the sponge, scrubbing as necessary.

Then use the squeegee to scrape the water off. (3/n)
Read 7 tweets

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