Itโs still not earning you money to spend electricity because you still have to pay the transfer fee which is around 6 cents / kWh but itโs pretty damn cheap nevertheless, mostly because of the excess in wind energy.
Last winter because of a mistake it dropped down to negative 50 cents / kWh for few hours, averaging negative 20 cents for the entire day. People were literally earning money by spending electricity. Some were running electric heaters outside in the middle of the winter.
Batteries are becoming less expensive every day. The market doubles almost every year, which is impressively high-paced.
You also donโt need battery storage to last a day. Most places only need approx. 6 hours, with particularly sunny countries being able to get away with having only 4 hours.
You maybe also be confusing local generation with centralised power generation. Nuclear is local, but also extremely centralised. Solar/wind transfer is very decentralised, same goes for battery storage.
Hydrogen is in its infancy. The tech is promising but whether or not it will prove its worth is still to be seen.
There are about 2 weeks without sun and wind in the whole EU every once in a while (donโt remember, like every 3 years?). How are 6 hours supposed to help? How much would these only 6 hours of storage capacity cost (pick some country, perhaps not Norway or Iceland).
I doubt thatโs true. Especially no sun sounds highly dubious, I donโt think the Earth stops spinning every now and then. Oh, and do note that solar panels are still producing even in cloudy conditions.
Thereโs no period during which renewables stop producing. โ6 hoursโ refers to the capacity if renewables stopped producing entirely, but in reality this never happens. At worst efficiency drops far enough to dip below demand, at which point the storage would have to kick in to make up the difference.
Building that much storage still costs a lot of money. I havenโt seen many cost estimates actually, probably because the market is developing at a very quick pace at the moment, driving costs down. A decent home battery solution costs 4000-10000 euros per household, but doing it at a larger scale may be cheaper.
Why would you even say something so stupid? I highly doubt that you are interested in a discussion.
But just in case, it is called โDunkelflauteโ. And no, we do not constantly produce so much more energy that losing a lot of capacity makes us โdip below demandโ. We constantly only produce as much as we need. But why even discuss this here? People spend their whole career figuring this out, it is obviously not as simple as you make it out to be. Here a report from the EU. Just to show the scale of the project:
It is estimated that 20-30 giga-factories for battery cells production alone will have to be built in Europe
