Mission City Research
@mcresearch.bsky.social
Mission City Research is a non-profit organization committed to advancing the world towards cleaner energy systems.
https://www.missioncityresearch.org
https://www.missioncityresearch.org
The latest CAISO Key Statistics report is available for October 2025. Plenty of useful factoids within...
Here is one - almost 15 GW of utility-scale batteries on the CAISO grid.
www.caiso.com/documents/ke...
Here is one - almost 15 GW of utility-scale batteries on the CAISO grid.
www.caiso.com/documents/ke...
November 17, 2025 at 8:20 PM
The latest CAISO Key Statistics report is available for October 2025. Plenty of useful factoids within...
Here is one - almost 15 GW of utility-scale batteries on the CAISO grid.
www.caiso.com/documents/ke...
Here is one - almost 15 GW of utility-scale batteries on the CAISO grid.
www.caiso.com/documents/ke...
Battery storage capacity continues to grow steadily on the CAISO grid. Currently nearing 15GW. As a reference - peak demand for CAISO was about 43GW this year.
Source: www.caiso.com/documents/ke... (Sep 2025 Key Statistics)
@californiaiso.bsky.social @calenergy.bsky.social
#energysky
Source: www.caiso.com/documents/ke... (Sep 2025 Key Statistics)
@californiaiso.bsky.social @calenergy.bsky.social
#energysky
October 20, 2025 at 5:19 PM
Battery storage capacity continues to grow steadily on the CAISO grid. Currently nearing 15GW. As a reference - peak demand for CAISO was about 43GW this year.
Source: www.caiso.com/documents/ke... (Sep 2025 Key Statistics)
@californiaiso.bsky.social @calenergy.bsky.social
#energysky
Source: www.caiso.com/documents/ke... (Sep 2025 Key Statistics)
@californiaiso.bsky.social @calenergy.bsky.social
#energysky
Note: Battery capacity a year ago was 9,309 MW - or about 9.3 GW.
September 9, 2025 at 4:44 PM
Note: Battery capacity a year ago was 9,309 MW - or about 9.3 GW.
CAISO—@californiaiso.bsky.social is out with its latest Key Statistics report, this one for August 2025.
Plenty of interesting info in this report - worth the read.
www.caiso.com/documents/ke...
Below is a sample showing that total battery storage has now passed 14GW.
Plenty of interesting info in this report - worth the read.
www.caiso.com/documents/ke...
Below is a sample showing that total battery storage has now passed 14GW.
September 9, 2025 at 4:41 PM
CAISO—@californiaiso.bsky.social is out with its latest Key Statistics report, this one for August 2025.
Plenty of interesting info in this report - worth the read.
www.caiso.com/documents/ke...
Below is a sample showing that total battery storage has now passed 14GW.
Plenty of interesting info in this report - worth the read.
www.caiso.com/documents/ke...
Below is a sample showing that total battery storage has now passed 14GW.
August 22, 2025 at 4:04 PM
Here is the supply chart for yesterday....
Note that at 6:00pm CAISO was actually still exporting. Five years ago, imports were needed to satisfy this kind of demand.
Note that at 6:00pm CAISO was actually still exporting. Five years ago, imports were needed to satisfy this kind of demand.
August 22, 2025 at 3:59 PM
Here is the supply chart for yesterday....
Note that at 6:00pm CAISO was actually still exporting. Five years ago, imports were needed to satisfy this kind of demand.
Note that at 6:00pm CAISO was actually still exporting. Five years ago, imports were needed to satisfy this kind of demand.
Yesterday was the highest peak demand so far in 2025 on @californiaiso.bsky.social - 43,735 MW at 6:00 PM.
Relatively easy to handle versus a few years ago due to the increase in Battery Storage.
Still, too much gas is being used to meet peak... more firm sources needed.
#energysky
Relatively easy to handle versus a few years ago due to the increase in Battery Storage.
Still, too much gas is being used to meet peak... more firm sources needed.
#energysky
August 22, 2025 at 3:55 PM
Yesterday was the highest peak demand so far in 2025 on @californiaiso.bsky.social - 43,735 MW at 6:00 PM.
Relatively easy to handle versus a few years ago due to the increase in Battery Storage.
Still, too much gas is being used to meet peak... more firm sources needed.
#energysky
Relatively easy to handle versus a few years ago due to the increase in Battery Storage.
Still, too much gas is being used to meet peak... more firm sources needed.
#energysky
California grid operator - CAISO - @californiaiso.bsky.social has released its July Key Statistics report.
Well worth the read.
July was a mild month weather-wise in California, and the stats reflect this.
www.caiso.com/documents/ke...
Here is a sample of the data.
#energysky
Well worth the read.
July was a mild month weather-wise in California, and the stats reflect this.
www.caiso.com/documents/ke...
Here is a sample of the data.
#energysky
August 20, 2025 at 6:18 PM
California grid operator - CAISO - @californiaiso.bsky.social has released its July Key Statistics report.
Well worth the read.
July was a mild month weather-wise in California, and the stats reflect this.
www.caiso.com/documents/ke...
Here is a sample of the data.
#energysky
Well worth the read.
July was a mild month weather-wise in California, and the stats reflect this.
www.caiso.com/documents/ke...
Here is a sample of the data.
#energysky
Battery storage is booming in the Western US - even outside of California.
- 7,200 MW of storage as of June 2025
- could have another 3,000 MW by year-end.
Need to keep up this pace if coal is to close out West.
#WesternGrid
#EnergySky
- 7,200 MW of storage as of June 2025
- could have another 3,000 MW by year-end.
Need to keep up this pace if coal is to close out West.
#WesternGrid
#EnergySky
August 11, 2025 at 8:20 PM
Battery storage is booming in the Western US - even outside of California.
- 7,200 MW of storage as of June 2025
- could have another 3,000 MW by year-end.
Need to keep up this pace if coal is to close out West.
#WesternGrid
#EnergySky
- 7,200 MW of storage as of June 2025
- could have another 3,000 MW by year-end.
Need to keep up this pace if coal is to close out West.
#WesternGrid
#EnergySky
New record for solar on ERCOT grid yesterday - 29,318 MW.
Source = www.gridstatus.io/records
Insane acceleration in solar deployment over the last five years.
Any bets on when solar hits 50GW on ERCOT? Over/Under for July 2028. We take the Under.
@commercialsolarguy.com
#energysky
Source = www.gridstatus.io/records
Insane acceleration in solar deployment over the last five years.
Any bets on when solar hits 50GW on ERCOT? Over/Under for July 2028. We take the Under.
@commercialsolarguy.com
#energysky
July 30, 2025 at 4:11 PM
New record for solar on ERCOT grid yesterday - 29,318 MW.
Source = www.gridstatus.io/records
Insane acceleration in solar deployment over the last five years.
Any bets on when solar hits 50GW on ERCOT? Over/Under for July 2028. We take the Under.
@commercialsolarguy.com
#energysky
Source = www.gridstatus.io/records
Insane acceleration in solar deployment over the last five years.
Any bets on when solar hits 50GW on ERCOT? Over/Under for July 2028. We take the Under.
@commercialsolarguy.com
#energysky
A remarkable week for renewable energy records across US grids.
Thanks to @gridstatus.io for info
Source: www.gridstatus.io/records
New all-time highs for renewables on 4 regional grids !
#energysky
Thanks to @gridstatus.io for info
Source: www.gridstatus.io/records
New all-time highs for renewables on 4 regional grids !
#energysky
June 23, 2025 at 2:40 PM
A remarkable week for renewable energy records across US grids.
Thanks to @gridstatus.io for info
Source: www.gridstatus.io/records
New all-time highs for renewables on 4 regional grids !
#energysky
Thanks to @gridstatus.io for info
Source: www.gridstatus.io/records
New all-time highs for renewables on 4 regional grids !
#energysky
2) How is it possible to have 29GW of generation when demand is less than 26 GW?
- exporting to other other areas
- charging batteries
Note: CAISO does not cont Large Hyrdo as renewable.
Source: www.caiso.com/todays-outlo...
#energysky
- exporting to other other areas
- charging batteries
Note: CAISO does not cont Large Hyrdo as renewable.
Source: www.caiso.com/todays-outlo...
#energysky
June 20, 2025 at 3:27 PM
2) How is it possible to have 29GW of generation when demand is less than 26 GW?
- exporting to other other areas
- charging batteries
Note: CAISO does not cont Large Hyrdo as renewable.
Source: www.caiso.com/todays-outlo...
#energysky
- exporting to other other areas
- charging batteries
Note: CAISO does not cont Large Hyrdo as renewable.
Source: www.caiso.com/todays-outlo...
#energysky
1) The records keep falling on the California grid @californiaiso.bsky.social .
New renewables peak record - 29,040 MW at 3:10 PM on Thursday.
Notes:
- Demand at 3:10 pm was only 25,992 MW.
- Two years ago, the record was only 23,457 MW
Source: www.gridstatus.io/records/cais...
New renewables peak record - 29,040 MW at 3:10 PM on Thursday.
Notes:
- Demand at 3:10 pm was only 25,992 MW.
- Two years ago, the record was only 23,457 MW
Source: www.gridstatus.io/records/cais...
June 20, 2025 at 3:24 PM
1) The records keep falling on the California grid @californiaiso.bsky.social .
New renewables peak record - 29,040 MW at 3:10 PM on Thursday.
Notes:
- Demand at 3:10 pm was only 25,992 MW.
- Two years ago, the record was only 23,457 MW
Source: www.gridstatus.io/records/cais...
New renewables peak record - 29,040 MW at 3:10 PM on Thursday.
Notes:
- Demand at 3:10 pm was only 25,992 MW.
- Two years ago, the record was only 23,457 MW
Source: www.gridstatus.io/records/cais...
Good to see wind and solar as the top 2 sources for electricity in the middle of a hot day in Texas.
#energysky
Source: www.gridstatus.io/live/ercot?d...
#energysky
Source: www.gridstatus.io/live/ercot?d...
June 18, 2025 at 4:09 PM
Good to see wind and solar as the top 2 sources for electricity in the middle of a hot day in Texas.
#energysky
Source: www.gridstatus.io/live/ercot?d...
#energysky
Source: www.gridstatus.io/live/ercot?d...
Massive increase - over 3,000 MW in renewables generation record for Texas(ERCOT) grid!
This record has increased 15,000 MW in just two years. Crazy!
#energysky
Source: www.gridstatus.io/records/erco...
This record has increased 15,000 MW in just two years. Crazy!
#energysky
Source: www.gridstatus.io/records/erco...
June 18, 2025 at 4:07 PM
Massive increase - over 3,000 MW in renewables generation record for Texas(ERCOT) grid!
This record has increased 15,000 MW in just two years. Crazy!
#energysky
Source: www.gridstatus.io/records/erco...
This record has increased 15,000 MW in just two years. Crazy!
#energysky
Source: www.gridstatus.io/records/erco...
A new record for battery discharge on CAISO - @californiaiso.bsky.social -
10,895 MW on June 17, 2025 at 08:05 PM
10,000 MW is now the "standard" for peak daily discharge. In another year, batteries will discharge 10,000 MW across multiple hours.
Source: www.gridstatus.io/records/cais...
10,895 MW on June 17, 2025 at 08:05 PM
10,000 MW is now the "standard" for peak daily discharge. In another year, batteries will discharge 10,000 MW across multiple hours.
Source: www.gridstatus.io/records/cais...
June 18, 2025 at 3:50 PM
A new record for battery discharge on CAISO - @californiaiso.bsky.social -
10,895 MW on June 17, 2025 at 08:05 PM
10,000 MW is now the "standard" for peak daily discharge. In another year, batteries will discharge 10,000 MW across multiple hours.
Source: www.gridstatus.io/records/cais...
10,895 MW on June 17, 2025 at 08:05 PM
10,000 MW is now the "standard" for peak daily discharge. In another year, batteries will discharge 10,000 MW across multiple hours.
Source: www.gridstatus.io/records/cais...
Big jump in renewable generation record for ERCOT yesterday.
Renewable generation went over 43GW for the first time - hitting 43,208 MW - representing about 58% of total output.
This record has increased by 13 GW in just three years!
Source: www.gridstatus.io/records/erco...
#energysky
Renewable generation went over 43GW for the first time - hitting 43,208 MW - representing about 58% of total output.
This record has increased by 13 GW in just three years!
Source: www.gridstatus.io/records/erco...
#energysky
June 3, 2025 at 6:39 PM
Big jump in renewable generation record for ERCOT yesterday.
Renewable generation went over 43GW for the first time - hitting 43,208 MW - representing about 58% of total output.
This record has increased by 13 GW in just three years!
Source: www.gridstatus.io/records/erco...
#energysky
Renewable generation went over 43GW for the first time - hitting 43,208 MW - representing about 58% of total output.
This record has increased by 13 GW in just three years!
Source: www.gridstatus.io/records/erco...
#energysky
Good recap of solar curtailment on CAISO grid - @californiaiso.bsky.social .
www.eia.gov/todayinenerg...
#energysky
www.eia.gov/todayinenerg...
#energysky
May 30, 2025 at 4:08 PM
Good recap of solar curtailment on CAISO grid - @californiaiso.bsky.social .
www.eia.gov/todayinenerg...
#energysky
www.eia.gov/todayinenerg...
#energysky
CAISO set a new Renewables peak generation record yesterday at 28,242 MW at 1:05 PM.
The load at this time was only 21 GW, so this record would not have been possible without recent growth in battery capacity.
Source: www.gridstatus.io/records/cais...
#energysky
@californiaiso.bsky.social
The load at this time was only 21 GW, so this record would not have been possible without recent growth in battery capacity.
Source: www.gridstatus.io/records/cais...
#energysky
@californiaiso.bsky.social
May 23, 2025 at 2:18 PM
CAISO set a new Renewables peak generation record yesterday at 28,242 MW at 1:05 PM.
The load at this time was only 21 GW, so this record would not have been possible without recent growth in battery capacity.
Source: www.gridstatus.io/records/cais...
#energysky
@californiaiso.bsky.social
The load at this time was only 21 GW, so this record would not have been possible without recent growth in battery capacity.
Source: www.gridstatus.io/records/cais...
#energysky
@californiaiso.bsky.social
Battery discharge on the CAISO grid went over 10,000 MW for the first time on Tuesday at 7:45PM!
This represented 32.5% of "generation".
Source: www.gridstatus.io/charts/fuel-...
Thanks to @gridstatus.io for info.
@californiaiso.bsky.social
#EnergySky
This represented 32.5% of "generation".
Source: www.gridstatus.io/charts/fuel-...
Thanks to @gridstatus.io for info.
@californiaiso.bsky.social
#EnergySky
May 22, 2025 at 5:24 PM
Battery discharge on the CAISO grid went over 10,000 MW for the first time on Tuesday at 7:45PM!
This represented 32.5% of "generation".
Source: www.gridstatus.io/charts/fuel-...
Thanks to @gridstatus.io for info.
@californiaiso.bsky.social
#EnergySky
This represented 32.5% of "generation".
Source: www.gridstatus.io/charts/fuel-...
Thanks to @gridstatus.io for info.
@californiaiso.bsky.social
#EnergySky
Battery storage is beginning to play an important role on the Southwest United States grid.
2,346 MW - Sat evening - 7:00PM
Let's see if battery storage can be the No 1 source in Spring 2026.
#energysky
#WesternGrid
Source: www.gridstatus.io/eia/SW?date=...
Thanks to @gridstatus.io !
2,346 MW - Sat evening - 7:00PM
Let's see if battery storage can be the No 1 source in Spring 2026.
#energysky
#WesternGrid
Source: www.gridstatus.io/eia/SW?date=...
Thanks to @gridstatus.io !
May 19, 2025 at 4:35 PM
Battery storage is beginning to play an important role on the Southwest United States grid.
2,346 MW - Sat evening - 7:00PM
Let's see if battery storage can be the No 1 source in Spring 2026.
#energysky
#WesternGrid
Source: www.gridstatus.io/eia/SW?date=...
Thanks to @gridstatus.io !
2,346 MW - Sat evening - 7:00PM
Let's see if battery storage can be the No 1 source in Spring 2026.
#energysky
#WesternGrid
Source: www.gridstatus.io/eia/SW?date=...
Thanks to @gridstatus.io !
Check out the latest monthly statistics for the California grid from @californiaiso.bsky.social
This report has plenty of interesting data, including the current installed battery capacity = 12,471 MW.
#energysky
See below.
www.caiso.com/documents/ke...
This report has plenty of interesting data, including the current installed battery capacity = 12,471 MW.
#energysky
See below.
www.caiso.com/documents/ke...
May 14, 2025 at 5:24 PM
Check out the latest monthly statistics for the California grid from @californiaiso.bsky.social
This report has plenty of interesting data, including the current installed battery capacity = 12,471 MW.
#energysky
See below.
www.caiso.com/documents/ke...
This report has plenty of interesting data, including the current installed battery capacity = 12,471 MW.
#energysky
See below.
www.caiso.com/documents/ke...
ERCOT set a new solar peak generation #record yesterday - 27,036 MW.
Thanks to @gridstatus.io for info.
Below is a chart showing annual peak generation milestones for the Texas grid.
The peak generation record should hit 30,000 MW later this year.
Perhaps 50,000 MW before 2030?!
#energysky
Thanks to @gridstatus.io for info.
Below is a chart showing annual peak generation milestones for the Texas grid.
The peak generation record should hit 30,000 MW later this year.
Perhaps 50,000 MW before 2030?!
#energysky
May 13, 2025 at 8:19 PM
ERCOT set a new solar peak generation #record yesterday - 27,036 MW.
Thanks to @gridstatus.io for info.
Below is a chart showing annual peak generation milestones for the Texas grid.
The peak generation record should hit 30,000 MW later this year.
Perhaps 50,000 MW before 2030?!
#energysky
Thanks to @gridstatus.io for info.
Below is a chart showing annual peak generation milestones for the Texas grid.
The peak generation record should hit 30,000 MW later this year.
Perhaps 50,000 MW before 2030?!
#energysky
Last Friday, solar generation exceeded 21 GW on the CAISO grid for the first time, setting a new record of 21,363 MW.
Note: At the time, the load on @californiaiso.bsky.social was only 18,190 MW.
Thanks to @gridstatus.io for the info.
Source: www.gridstatus.io/records/cais...
#energysky
Note: At the time, the load on @californiaiso.bsky.social was only 18,190 MW.
Thanks to @gridstatus.io for the info.
Source: www.gridstatus.io/records/cais...
#energysky
May 5, 2025 at 5:43 PM
Last Friday, solar generation exceeded 21 GW on the CAISO grid for the first time, setting a new record of 21,363 MW.
Note: At the time, the load on @californiaiso.bsky.social was only 18,190 MW.
Thanks to @gridstatus.io for the info.
Source: www.gridstatus.io/records/cais...
#energysky
Note: At the time, the load on @californiaiso.bsky.social was only 18,190 MW.
Thanks to @gridstatus.io for the info.
Source: www.gridstatus.io/records/cais...
#energysky
5) Next up, eliminating coal in the Southwest - NM, AZ and NV.
There is just under 5GW of coal capacity and about 20 TWh of coal generation to replace.
In 2025/26, these three states will add the following capacity:
Batteries: 6.7 TW
Solar: 4.5 GW
Wind: 3.7 GW
There is just under 5GW of coal capacity and about 20 TWh of coal generation to replace.
In 2025/26, these three states will add the following capacity:
Batteries: 6.7 TW
Solar: 4.5 GW
Wind: 3.7 GW
April 29, 2025 at 4:37 PM
5) Next up, eliminating coal in the Southwest - NM, AZ and NV.
There is just under 5GW of coal capacity and about 20 TWh of coal generation to replace.
In 2025/26, these three states will add the following capacity:
Batteries: 6.7 TW
Solar: 4.5 GW
Wind: 3.7 GW
There is just under 5GW of coal capacity and about 20 TWh of coal generation to replace.
In 2025/26, these three states will add the following capacity:
Batteries: 6.7 TW
Solar: 4.5 GW
Wind: 3.7 GW