4 ms·

What is your source for this? I’m highly skeptical because it means there was never a time of low wind at night ir when it was cloudy. February 26th of last ye

What is your source for this? I’m highly skeptical because it means there was never a time of low wind at night ir when it was cloudy. February 26th of last year sure looks like a lot less than 30% renewable. https://mobile.twitter.com/energybants/status/1497392463731908614 https://mobile.twitter.com/energybants/status/14973924637319...

sveme 4y ago
There's also hydro (incl. imported from Norway) and biomass. Source for total renewable over time is here: https://www.zeit.de/wirtschaft/energiemonitor-deutschland-gaspreis-spritpreis-energieversorgung https://www.zeit.de/wirtschaft/energiemonitor-deutschland-ga... There might be spells during the day where this is less than 30%, but that's what short term storage would be there for. The nightmare scenario, often mentioned, is weeks of clouds and low winds, which does not seem to have occurred last year, at least. And even when it's cloudy you still have some solar. By the way, I'm not arguing that all is well and everything is solved, I just hate this juvenile argument of "but what if it's cloudy and there is no wind for weeks", because that does not happen often, especially not on a continent-wide grid with lots of offshore wind power in one of the windiest seas in the world.
- dahfizz 4y ago
  According to that source, this morning in Germany the total solar + wind + biomass energy production was under 410MWh, whereas gas + coal was around 8500MWh. Conservatively, _just the battery cells_ to make up for that shortfall _for just one hour_ would cost over $1B. This isn't a once in a while issue that can be solved with a few batteries. We need revolutionary grid-scale storage tech to make renewables work. Current batteries are orders-of-magnitude too expensive and we have orders-of-magnitude too little manufacturing capacity.
  - sveme 4y ago
    The problem with these discussions is always that we are laymen using handwaving arguments to push for or against a topic. So useless all in all and just aiming for winning an argument instead of trying to solve a problem. Frustrating. Let's ask Mark Jacobson from Stanford what his modelling shows: https://web.stanford.edu/group/efmh/jacobson/Articles/I/21-USStates-PDFs/21-USStatesPaper.pdf https://web.stanford.edu/group/efmh/jacobson/Articles/I/21-U...

sveme 4y ago

There's also hydro (incl. imported from Norway) and biomass. Source for total renewable over time is here: https://www.zeit.de/wirtschaft/energiemonitor-deutschland-gaspreis-spritpreis-energieversorgung https://www.zeit.de/wirtschaft/energiemonitor-deutschland-ga... There might be spells during the day where this is less than 30%, but that's what short term storage would be there for. The nightmare scenario, often mentioned, is weeks of clouds and low winds, which does not seem to have occurred last year, at least. And even when it's cloudy you still have some solar. By the way, I'm not arguing that all is well and everything is solved, I just hate this juvenile argument of "but what if it's cloudy and there is no wind for weeks", because that does not happen often, especially not on a continent-wide grid with lots of offshore wind power in one of the windiest seas in the world.

dahfizz 4y ago
According to that source, this morning in Germany the total solar + wind + biomass energy production was under 410MWh, whereas gas + coal was around 8500MWh. Conservatively, _just the battery cells_ to make up for that shortfall _for just one hour_ would cost over $1B. This isn't a once in a while issue that can be solved with a few batteries. We need revolutionary grid-scale storage tech to make renewables work. Current batteries are orders-of-magnitude too expensive and we have orders-of-magnitude too little manufacturing capacity.
- sveme 4y ago
  The problem with these discussions is always that we are laymen using handwaving arguments to push for or against a topic. So useless all in all and just aiming for winning an argument instead of trying to solve a problem. Frustrating. Let's ask Mark Jacobson from Stanford what his modelling shows: https://web.stanford.edu/group/efmh/jacobson/Articles/I/21-USStates-PDFs/21-USStatesPaper.pdf https://web.stanford.edu/group/efmh/jacobson/Articles/I/21-U...