Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

Tesla Virtual Power Plant in CA

This site may earn commission on affiliate links.
#641
MJ_CA_2019 said:
From my Tesla App:

Energy Discharged from the Powerwall (we have 3 PW2)

Date - kWh used (reserve left at end of peak)
8/31/2022 - 35.0 kWh (5%) *Event Day*
8/30 - 26.1 kWh (29%)
8/29 - 26.5 kWh (30%)
8/26 - 25.9 kWh (34%)
8/25 - 29.8 kWh (18%)
8/24 - 19.3 kWh (47%)
8/23 - 21.8 kWh (42%)
8/22 - 19.1 kWh (48%)
8/19 - 31.6 kWh (15%)
8/18 - 28.8 kWh (22%)
8/17 - 35.0 kWh (5%) *Event Day*
8/16 - 24.7 kWh (33%)

Average of last 10 weekdays (other event day excluded) = 25.36

Does this mean I would only get credit for 35.0 - 25.36 = 9.64 kWh for yesterday's event?
Click to expand...
The good news is that it is better than that as you were probably discharging from 4:00-9:00pm. The bad news is getting the right number is more complicated as you need to get the detailed daily data from the app. After pulling eleven sets of the daily data with 5 min increments for my system and some spreadsheet manipulation I got the following:
DayDate
5:00-6:00pm​
6:00-7:00pm​
7:00-8:00pm​
Total kWh​
Wed2022-08-31
7.23​
7.23​
9.02​
23.48​
Tue2022-08-30
2.63​
2.31​
1.40​
6.34​
Mon2022-08-29
2.99​
2.36​
0.00​
5.35​
Fri2022-08-26
2.57​
3.88​
0.93​
7.37​
Thu2022-08-25
2.38​
2.20​
1.60​
6.18​
Wed2022-08-24
2.47​
2.83​
0.98​
6.28​
Tue2022-08-23
4.18​
2.03​
-0.08​
6.13​
Mon2022-08-22
3.04​
-0.18​
-0.03​
2.83​
Fri2022-08-19
2.48​
3.41​
0.00​
5.88​
Thu2022-08-18
2.04​
1.89​
0.03​
3.96​
Tue2022-08-16
0.00​
1.33​
5.00​
6.33​
Note: Wed 2022-08-17 is omitted as it was a VPP event day.

This gives my average as 5.66 kWh versus my export of 23.48 kWh for a ILR of 17.82 kWh which is worth $35.64
 
  • Like
Reactions: MJ_CA_2019 and power.saver
#642
MJ_CA_2019 said:
From my Tesla App:

Energy Discharged from the Powerwall (we have 3 PW2)

Does this mean I would only get credit for 35.0 - 25.36 = 9.64 kWh for yesterday's event?

IDK how to adjust for the "event hours" since the 8/17 event was 6-9 pm and the 8/31 event was 5-8 pm for me.
The numbers I gave are for my peak period (4-9 pm TOU-B)
Click to expand...
It's a little more complicated than that because you have to look at the hour-for-hour comparison. Also, skip event days and pull in the previous weekday instead. For 8/31, you'll need to find out what your discharge was from 5-8 pm for weekdays from 8/16 to 8/30, skipping 8/17. That average is your baseline.

The complexity probably explains why Tesla doesn't (yet?) have the numbers in their app.
 
  • Informative
Reactions: MJ_CA_2019
#643
Redhill_qik said:
If there was a real danger of rolling blackouts to prevent grid collapse then I likely would not participate, but this hasn't happened and really isn't a high risk factor as CAISO has been showing lots of reserves. Those reserves have higher pollution and higher cost, but not as high as the VPP pays currently.
Click to expand...
At least in our tree-lined neighborhood, it's not rolling blackouts per se (and I'm in a outage block 50, so maybe no blackouts due to nearby fire station and hospital), it's the extreme heating causing big tree limbs to fall and drop onto overhead power lines. I can recall may a hot summer evening sitting in the darkness with a few flashlights/lanterns, the little portable A/C unit silenced in the corner...
 
#644
A new VPP event just came up with almost no notice. Started today, Thur 9/1, at 1:40 PM. Ends at 6:00 PM.

Interesting behavior. I was just drying a load of laundry and the expected to have the drying load and VPP load. But I have not sent any power to the grid. It is as if the system saw I want using a lot of power for the dryer (6.2 Kw) and decided not to send any to the grid for the VPP event. I wonder what will happen when the dryer cycle ends?
-----
As it is now, solar is providing all power for the dryer and the powerwalls are at 100% and sending nothing of note to the grid. I see an occasional 0.1 kW sent to the grid, but nothing like the 9.8 kW that was sent during the event yesterday. I wonder if there is logic that does not send power until there is a certain amount of excess power. Or do they have the ability to only send excess solar, which I do not have now, for events in the middle of the day.
-----
Another theory is my system is not participating in the event. VPP status says, "Powerwall is preparing for a grid event". Perhaps they decided not to use my powerwalls at this point in time? Excess solar is going to grid since the Powerwalls are at 100%. Do I get $2 for each kWh? VPP display shows 6102 kW and 2,859 Fleet Homes.
 
Last edited:
#645
jboy210 said:
A new VPP even just came up with almost no notice. Started today, Thur 9/1, at 1:40 PM. Ends at 6:00 PM.

Interesting behavior. I was just drying a load of laundry and the expected to have the drying load and VPP load. But I have not sent any power to the grid. It is as if the system saw I want using a lot of power for the dryer (6.2 Kw) and decided to send any to the grid for the VPP event. I wonder what will happen when the dryer cycle ends?
Click to expand...
At least in SoCal while the "event" started at 1:45pm (i.e. charging the PWs), discharging won't start until 6:00pm and end at 7:00pm.
 
  • Like
  • Informative
Reactions: Redhill_qik and schettj
#646
jboy210 said:
A new VPP even just came up with almost no notice. Started today, Thur 9/1, at 1:40 PM. Ends at 6:00 PM.

Interesting behavior. I was just drying a load of laundry and the expected to have the drying load and VPP load. But I have not sent any power to the grid. It is as if the system saw I want using a lot of power for the dryer (6.2 Kw) and decided to send any to the grid for the VPP event. I wonder what will happen when the dryer cycle ends?

As it is now, solar is providing all power for the dryer and the powerwalls are at 100%. I see an occasional 0.1 kW sent to the grid, but nothing like the 9.8 kW that was sent during the event yesterday. I wonder if there is logic that does not send power until there is a certain amount of excess power. Or do they have the ability to only send excess solar. which I do not have now, for events in the middle of the day
Click to expand...
I think you may have misread the details. In my App it says charging starting 1:40pm, discharging starting 6pm, finishing at 7pm.
 
  • Like
  • Informative
Reactions: jboy210 and Redhill_qik
#647
jboy210 said:
A new VPP even just came up with almost no notice. Started today, Thur 9/1, at 1:40 PM. Ends at 6:00 PM.
Click to expand...
It is a short one just from 6:00-7:00pm, so it shouldn't be draining anyone's Powerwall since the max you can export is just 5.0 kWh. Most of the Powerwalls are still recovering from the event yesterday and with a total charge of 6819 kW at 1:50pm (now 6166kw at 2:00pm)

@cwied has a post in the Norcal heat wave thread about a speculating that we would have another event today
There's an EEA (Emergency Energy Alert) Watch posted for 6pm - 7pm tonight. Yesterday's VPP event matched the hours for yesterday's EEA, FWIW.
Click to expand...
I changed my Powerwall reserve to 100% to get all of the solar going to Powerwall instead it being split between the house and Powerwalls, so that they would get back to 100% before 4:00pm Peak.
 
#649
Redhill_qik said:
It is a short one just from 6:00-7:00pm, so it shouldn't be draining anyone's Powerwall since the max you can export is just 5.0 kWh. Most of the Powerwalls are still recovering from the event yesterday and with a total charge of 6819 kW at 1:50pm (now 6166kw at 2:00pm)

@cwied has a post in the Norcal heat wave thread about a speculating that we would have another event today

I changed my Powerwall reserve to 100% to get all of the solar going to Powerwall instead it being split between the house and Powerwalls, so that they would get back to 100% before 4:00pm Peak.
Click to expand...
My PWs were down to 20% last night so I turn on charge from grid after midnight to 40% but strangely my PWs got charged to 100% this morning. The 1 hour thing tonight should be easy.
 
#650
Redhill_qik said:
It is a short one just from 6:00-7:00pm, so it shouldn't be draining anyone's Powerwall since the max you can export is just 5.0 kWh. Most of the Powerwalls are still recovering from the event yesterday and with a total charge of 6819 kW at 1:50pm (now 6166kw at 2:00pm)

@cwied has a post in the Norcal heat wave thread about a speculating that we would have another event today

I changed my Powerwall reserve to 100% to get all of the solar going to Powerwall instead it being split between the house and Powerwalls, so that they would get back to 100% before 4:00pm Peak.
Click to expand...
Makes sense. We were sending 9.9 kW from our 2 powerwalls yesterday. The Solarroof did its job and had them topped off by 11 AM.
 
#652
I'm at 88% state of charge right now because we went all the way down to 5% yesterday during the event.
Fortunately the event today will only be one hour, so 10.8 kWh will be exported [site limit] (We will see how Solar balances against Home load for that hour).
 
#655
MJ_CA_2019 said:
I'm at 88% state of charge right now because we went all the way down to 5% yesterday during the event.
Fortunately the event today will only be one hour, so 10.8 kWh will be exported [site limit] (We will see how Solar balances against Home load for that hour).
Click to expand...
Remember it isn't how much you export to the grid, it is how much you discharge from the Powerwalls. Your grid export is limited to 10.8kW, but if you have three Powerwalls that can discharge up to 15.0 kW then you can max out if your house is consuming 4.2 kW at the same time that you are exporting to 10.8 kW to the grid, probably need even more on the house load as solar will still be producing from 6:00-7:00pm
 
#659
I am anticipating a lot of complaints from people about this event. We just went into Peak time at 4:00pm and the VPP is no longer showing any charging at 4:05pm, will it just went to 2-7kW down from 1165 kW at 3:59pm. The VPP controller is not letting any discharge occur from 4:00-6:00pm, then it will discharge up to 5.0kWh/Powerwall from 6:00-7:00pm and the event is over. Maybe the normal controls come back and the Powerwalls continue to discharge from 7:00-9:00pm, but I'm sure some people are going to be upset about importing at Peak pricing and not being able to Export Everything.
 
#660
Redhill_qik said:
Remember it isn't how much you export to the grid, it is how much you discharge from the Powerwalls. Your grid export is limited to 10.8kW, but if you have three Powerwalls that can discharge up to 15.0 kW then you can max out if your house is consuming 4.2 kW at the same time that you are exporting to 10.8 kW to the grid, probably need even more on the house load as solar will still be producing from 6:00-7:00pm
Click to expand...
Right, but since the sun will still be up and the event is only 1 hour I'm going to be watching the balance between Solar and Home Load.
In other words, I might have less than 10.8 kW output from the PW to hit the site limit export.
 
You must log in or register to reply here.

Similar threads

Y
Tesla Virtual Power Plant - CA (Released for some SCE customers starting 08.15.2022)
Replies
38
Views
4K
Tesla Energy
Steveohkb24
S
Mardak
Charge on Solar "The site needs to have solar without any export limitations."
Replies
3
Views
582
Tesla Energy
Pink Duck
Pink Duck
L
New to this, Tesla energy app a little confusing, need help on MY HOME screen.
Replies
24
Views
733
Tesla Energy
charlesj
charlesj
J
SPAN.io and Powerwall interface
Replies
11
Views
614
Tesla Energy
Joesmoe3
J
Olle
Finally! Dynamic Power Management for wall connector
Replies
33
Views
3K
North America
miimura
M
Top
Back
Blog
New
Forum list
Marketplace
Menu