Jenny Chase
@solarchase.bsky.social
Solar analyst at BloombergNEF, goose keeper. Author of a book, "Solar Power Finance Without the Jargon". Opinions all my own.
I do not believe in paper bags for groceries (rain, sharp corners, limoncello-and-broken-glass-all-over-the-road moments) but with a Bag for Life and a bungee cord you can transport anything.
This is today, I can carry a lot more on my bike if necessary.
This is today, I can carry a lot more on my bike if necessary.
November 11, 2025 at 2:29 PM
I do not believe in paper bags for groceries (rain, sharp corners, limoncello-and-broken-glass-all-over-the-road moments) but with a Bag for Life and a bungee cord you can transport anything.
This is today, I can carry a lot more on my bike if necessary.
This is today, I can carry a lot more on my bike if necessary.
Blowing my husband's mind with an old-fashioned solution to the problem "need to create a physical document, do not own a printer".
(We usually print at the office, but parental leave...)
(We usually print at the office, but parental leave...)
November 9, 2025 at 10:16 AM
Blowing my husband's mind with an old-fashioned solution to the problem "need to create a physical document, do not own a printer".
(We usually print at the office, but parental leave...)
(We usually print at the office, but parental leave...)
This is the Marktecke in Olten, where one can buy unpackaged lentils, olive oil etc if you bring your own container.
I love this shop and if I bought Halloween treats here I would be the worst parent ever, even worse than the time I made flapjacks for summer camp.
I love this shop and if I bought Halloween treats here I would be the worst parent ever, even worse than the time I made flapjacks for summer camp.
October 31, 2025 at 2:01 PM
This is the Marktecke in Olten, where one can buy unpackaged lentils, olive oil etc if you bring your own container.
I love this shop and if I bought Halloween treats here I would be the worst parent ever, even worse than the time I made flapjacks for summer camp.
I love this shop and if I bought Halloween treats here I would be the worst parent ever, even worse than the time I made flapjacks for summer camp.
42. Annual build volumes of solar are rising, but they are not guaranteed to rise forever. This is a symptom of solar starting to actually make a dent in power demand, with negative feedback effects such as power price cannibalization.
October 20, 2025 at 7:57 AM
42. Annual build volumes of solar are rising, but they are not guaranteed to rise forever. This is a symptom of solar starting to actually make a dent in power demand, with negative feedback effects such as power price cannibalization.
33. How mismatched is European seasonal solar supply and electricity demand? Well, here is the situation for my fully electrified house in Switzerland with 13.2kW of solar, a heatpump and an EV. I would have needed about 122kW of PV to be self-sufficient across December.
October 20, 2025 at 7:55 AM
33. How mismatched is European seasonal solar supply and electricity demand? Well, here is the situation for my fully electrified house in Switzerland with 13.2kW of solar, a heatpump and an EV. I would have needed about 122kW of PV to be self-sufficient across December.
8. India and the US have solar import tariffs, so modules are pricier there (~15 and ~27 cents/W respectively). Both countries are subsidizing local manufacturing capacity. This is a perfectly good strategy as long as it doesn’t slow down their energy transition, but...
October 20, 2025 at 7:47 AM
8. India and the US have solar import tariffs, so modules are pricier there (~15 and ~27 cents/W respectively). Both countries are subsidizing local manufacturing capacity. This is a perfectly good strategy as long as it doesn’t slow down their energy transition, but...
2. 20 years ago when I got this job, I thought maybe solar would one day be 1% of global electricity supply. In 2024 it was about 7% worldwide, and rising fast. You can see this eating into fossil fuel power generation in, for example, Europe.
October 20, 2025 at 7:45 AM
2. 20 years ago when I got this job, I thought maybe solar would one day be 1% of global electricity supply. In 2024 it was about 7% worldwide, and rising fast. You can see this eating into fossil fuel power generation in, for example, Europe.
Still on maternity leave. Baby fat? Yes, baby very fat.
October 8, 2025 at 6:32 PM
Still on maternity leave. Baby fat? Yes, baby very fat.
I love the local public swimming pool, in Roggwil. Sadly as the days get cooler it is more and more like a private swimming pool, and it closes for the season on Saturday.
September 16, 2025 at 10:20 AM
I love the local public swimming pool, in Roggwil. Sadly as the days get cooler it is more and more like a private swimming pool, and it closes for the season on Saturday.
I am currently quiet on clean energy because this household is in the trenches of having a new baby. So. Much. Pee. So much laundry.
So much trying to tell if a grumpy noise means the strange little creature wants something, or something is wrong, or if he's just trying to fart.
So much trying to tell if a grumpy noise means the strange little creature wants something, or something is wrong, or if he's just trying to fart.
August 29, 2025 at 4:36 PM
I am currently quiet on clean energy because this household is in the trenches of having a new baby. So. Much. Pee. So much laundry.
So much trying to tell if a grumpy noise means the strange little creature wants something, or something is wrong, or if he's just trying to fart.
So much trying to tell if a grumpy noise means the strange little creature wants something, or something is wrong, or if he's just trying to fart.
Child labour was deployed to medicate all fourteen geese on three consecutive days, with weight-calibrated doses.
Thank you to @feiwang.bsky.social for the weighing and recording help!
Thank you to @feiwang.bsky.social for the weighing and recording help!
August 21, 2025 at 3:25 PM
Child labour was deployed to medicate all fourteen geese on three consecutive days, with weight-calibrated doses.
Thank you to @feiwang.bsky.social for the weighing and recording help!
Thank you to @feiwang.bsky.social for the weighing and recording help!
Been busy this week. My clean energy work is going to be essentially nonexistent for the rest of the year, though sure I will get bored and be back intermittently.
Child 2 is reassuringly normal, I am much better for being home from hospital and having aircon.
Child 2 is reassuringly normal, I am much better for being home from hospital and having aircon.
August 15, 2025 at 8:28 AM
Been busy this week. My clean energy work is going to be essentially nonexistent for the rest of the year, though sure I will get bored and be back intermittently.
Child 2 is reassuringly normal, I am much better for being home from hospital and having aircon.
Child 2 is reassuringly normal, I am much better for being home from hospital and having aircon.
Managed to attend both my appointment (without goose) and vet appointment with goose.
She has blood tests, antibiotics and anti-inflammatories and I will collect some faeces to post to the vet for a flock parasite check.
She has blood tests, antibiotics and anti-inflammatories and I will collect some faeces to post to the vet for a flock parasite check.
August 6, 2025 at 5:18 PM
Managed to attend both my appointment (without goose) and vet appointment with goose.
She has blood tests, antibiotics and anti-inflammatories and I will collect some faeces to post to the vet for a flock parasite check.
She has blood tests, antibiotics and anti-inflammatories and I will collect some faeces to post to the vet for a flock parasite check.
I do bloody love this chart. Who'd have thought, 20 years ago, that solar would be ~10% of world electricity generation by 2024 - and over 20% in some countries, rising rapidly in others?
Definitely not me. When I started this job I hoped to be part of a solution for maybe 1% of global electricity.
Definitely not me. When I started this job I hoped to be part of a solution for maybe 1% of global electricity.
August 6, 2025 at 7:37 AM
I do bloody love this chart. Who'd have thought, 20 years ago, that solar would be ~10% of world electricity generation by 2024 - and over 20% in some countries, rising rapidly in others?
Definitely not me. When I started this job I hoped to be part of a solution for maybe 1% of global electricity.
Definitely not me. When I started this job I hoped to be part of a solution for maybe 1% of global electricity.
If you are in the US and you buy a home solar system from Sunrun, you cover over $1/W of their sales cost.
While (from EUPD / BNEF) German systems are <$1.50/W total. You just call your local installer / use an online service to find a local installer! Sales costs minimal.
While (from EUPD / BNEF) German systems are <$1.50/W total. You just call your local installer / use an online service to find a local installer! Sales costs minimal.
August 6, 2025 at 6:58 AM
If you are in the US and you buy a home solar system from Sunrun, you cover over $1/W of their sales cost.
While (from EUPD / BNEF) German systems are <$1.50/W total. You just call your local installer / use an online service to find a local installer! Sales costs minimal.
While (from EUPD / BNEF) German systems are <$1.50/W total. You just call your local installer / use an online service to find a local installer! Sales costs minimal.
But also these US-specific numbers are crazy! Utility-scale solar still costing over $1 per W(DC) in the US? Our global benchmark, relevant to most European markets with China and India maybe a bit cheaper, was $0.51/W(DC) for 2024. And modules are only about 20 cents per W more expensive in the US.
August 6, 2025 at 6:20 AM
But also these US-specific numbers are crazy! Utility-scale solar still costing over $1 per W(DC) in the US? Our global benchmark, relevant to most European markets with China and India maybe a bit cheaper, was $0.51/W(DC) for 2024. And modules are only about 20 cents per W more expensive in the US.
End of extended-family beach holiday in glamourous Bognor Regis. Underrated, tbh, especially with a swarm of small children (mine, and her cousins of various degrees). No more 7am sea swims.
Now hoping Child 2 stays inside for the entire duration of the train ride back to Switzerland.
Now hoping Child 2 stays inside for the entire duration of the train ride back to Switzerland.
August 1, 2025 at 9:35 AM
End of extended-family beach holiday in glamourous Bognor Regis. Underrated, tbh, especially with a swarm of small children (mine, and her cousins of various degrees). No more 7am sea swims.
Now hoping Child 2 stays inside for the entire duration of the train ride back to Switzerland.
Now hoping Child 2 stays inside for the entire duration of the train ride back to Switzerland.
I hate drama but this account has found its way into a few of your follow lists and is posing as a legit energy / climate type with a fixation on hydrogen. Best to block, as I'm about to do.
TW: extremely random antisemitism, especially as a response to a post about berries.
TW: extremely random antisemitism, especially as a response to a post about berries.
July 8, 2025 at 8:48 AM
I hate drama but this account has found its way into a few of your follow lists and is posing as a legit energy / climate type with a fixation on hydrogen. Best to block, as I'm about to do.
TW: extremely random antisemitism, especially as a response to a post about berries.
TW: extremely random antisemitism, especially as a response to a post about berries.
Gooseberries and blackcurrants are also pretty, tastier, and only slightly harder to harvest.
But the queen of the early summer fruit for beauty and taste is the cherry. Which is why it only fruits heavily every 2-3 years, you have a 2-week window to harvest, and stoning them is a pain.
But the queen of the early summer fruit for beauty and taste is the cherry. Which is why it only fruits heavily every 2-3 years, you have a 2-week window to harvest, and stoning them is a pain.
July 6, 2025 at 12:15 PM
Gooseberries and blackcurrants are also pretty, tastier, and only slightly harder to harvest.
But the queen of the early summer fruit for beauty and taste is the cherry. Which is why it only fruits heavily every 2-3 years, you have a 2-week window to harvest, and stoning them is a pain.
But the queen of the early summer fruit for beauty and taste is the cherry. Which is why it only fruits heavily every 2-3 years, you have a 2-week window to harvest, and stoning them is a pain.
Redcurrants are so bloody beautiful, man.
They are also easy to harvest and the birds don't seem to covet them, so inevitably they taste very sour. I am making jam with them and gooseberries, blackcurrants, josterbeeren and the last of the cherries.
They are also easy to harvest and the birds don't seem to covet them, so inevitably they taste very sour. I am making jam with them and gooseberries, blackcurrants, josterbeeren and the last of the cherries.
July 6, 2025 at 12:05 PM
Redcurrants are so bloody beautiful, man.
They are also easy to harvest and the birds don't seem to covet them, so inevitably they taste very sour. I am making jam with them and gooseberries, blackcurrants, josterbeeren and the last of the cherries.
They are also easy to harvest and the birds don't seem to covet them, so inevitably they taste very sour. I am making jam with them and gooseberries, blackcurrants, josterbeeren and the last of the cherries.
I really like running the airconditioning on solar power.
July 4, 2025 at 2:09 PM
I really like running the airconditioning on solar power.
Another angle is that, as your battery fleet grows, incremental batteries are getting much lower utilization than the first ones, so they're a lot less economic to add (even when you have wind as well as solar to balance seasonality). Batteries cannibalize batteries quite fast.
June 23, 2025 at 10:35 AM
Another angle is that, as your battery fleet grows, incremental batteries are getting much lower utilization than the first ones, so they're a lot less economic to add (even when you have wind as well as solar to balance seasonality). Batteries cannibalize batteries quite fast.
Hmmm. This is from the Ember report on solar + storage, and I got excited thinking there's already an entirely solar + storage powered data center (Moro, in the UAE) but I actually think this just has MWh matching, not a big battery.
June 23, 2025 at 7:43 AM
Hmmm. This is from the Ember report on solar + storage, and I got excited thinking there's already an entirely solar + storage powered data center (Moro, in the UAE) but I actually think this just has MWh matching, not a big battery.
Apparently as my garden matures I have become the sort of person who makes jam, just to reduce the wastage of all the summer fruit ripening at once.
June 21, 2025 at 12:28 PM
Apparently as my garden matures I have become the sort of person who makes jam, just to reduce the wastage of all the summer fruit ripening at once.
And have absolutely no concept of personal space.
June 18, 2025 at 6:19 PM
And have absolutely no concept of personal space.