-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Any way to keep Powerwalls from charging without turning off their breakers?
- Thread starter sorka
- Start date
Cost saving mode for me has always sent 100% of solar to the grid during peak times. This has never been an issue. The issue is what advanced mode does for me during off peak. Not sure why balanced had the house consuming from the grid during peak.
I have noticed same thing, seems to be learning. My reserve on both GW's is set at 10%, and it never gets close.
I don't have a good answer on how long it will take. I've had a system for 3 years now. The early days were rough.
I added more solar and battery a week ago and it seemed to just take a few days to adjust to additional batteries and solar. If your system is new it take it a few weeks. I would recommend picking a setting and leaving it there for a couple of weeks.
I'll try it but if it if balanced results in any consumption from the grid during peak, I'm going to shut that down real quick.
I have had zero from grid during peak, 3pm to 12pm, using balanced, 100% coming from my batteries
Merrill
Merrill
I run my system to power the house from 4 to 9pm peak it goes from 100% to around 80% then in the morning solar charges the Powerwalls back to 100% by 11 or 12pm. I’m on timed based cost saving.
Mine looks like @arnolddeleon does. I think mine took 2 maybe 3 weeks to settle in. According to the docs, it is an ML model so it is going to need some data to do some fine-tuning on your specific system.
skepticcyclist
Member
Good luck in finding the best setting. Hopefully you can eventually find a solution by that best works for you.
Like I stated, try doing a shoulder period form 3-7 and then your peak from 7-12 in balanced mode. Give it a few days and see if it eventually learns your usage. Hopefully you wont have to keep flipping the breaker
Like I stated, try doing a shoulder period form 3-7 and then your peak from 7-12 in balanced mode. Give it a few days and see if it eventually learns your usage. Hopefully you wont have to keep flipping the breaker
skepticcyclist
Member
This was a full day of balanced in November. Sorry the images are not of the full screen. I posted these on IG and no longer have the original image on my phone. You can see the only time I used the grid from from 9:00pm to 12:00am.
I currently have mine in cost savings because I want to sell as much back to the power company as possible and I want to reduce the number of cycles on my battery. In fact I changed my peak to start at 5:30 instead of 4:00 so I can still use solar instead of the battery during that time
I currently have mine in cost savings because I want to sell as much back to the power company as possible and I want to reduce the number of cycles on my battery. In fact I changed my peak to start at 5:30 instead of 4:00 so I can still use solar instead of the battery during that time
Attachments
eml2
Member
What was your reserve % setting when this happened? I also used balanced mode and only excess solar goes to charge battery. The only time 100% solar goes to battery is when reserve % is higher than SoC.
Also, during peak, battery and solar always cover house load. No grid usage during peak. In fact, I notice that if reserve % is higher than SoC when it enters peak, and solar is not enough to cover house load (cloudy day), it will ignore reserve % and discharge battery. Wonder if anyone seeing this as well?
Last edited:
Here is another photo (also added to the original album I shared) shows how the system responded when I started cars charging and turned on oven. You can see the Powerwall fip from charging to discharging and the back to charging again.
skepticcyclist
Member
I don't know that that is. If you're referring to my rate plan, I have SoCal Edison and I'm on their Prime TOU plan.
Attachments
If you are not on an plan like pge ev2-a, which peak is 3x non peak, then yet, strategies change
Have you tried BALANCED mode and configure peak hours much earlier in the day? Once you hit peak hour the batteries should discharge to maximize the NEM credits (as it assumes you were in peak period). If you set it peak early the batteries may never have enough time to get to 100%. Never tried this myself. I previously was going into the app making daily changes and trying to minimize NBC's and keeping the time the PW's were at 100% charge to a minimum by flipping the different modes. I found that Balanced closely mimic'd what I was trying to do. From my review, Balanced tries to maximize self consumption but with an end goal to get to ~100% right when non-peak ends.
I have read this thread from start to finish, as I would also like to stop powerwall charging, but for different reasons.
We haven't actually got a powerwall yet, but do have one on order.
We are on a tariff where we get very little for any solar we export, so my objective is always to export as little to the grid as possible. We have very cheap rate power over night and flat (expensive) rate during the day.
Due to the orientation of our panels, (roof faces SE), maximum generation is in the morning.
The Tesla is my wife's car and she normally goes out between 9:00 and 10:00. returning at some point in the afternoon.
What I would really like is for the car to take all the solar until it goes out, and then the solar to charge the powerwall.
What I don't want is for the power wall to grab all the solar when the sun comes up, then the power wall becomes fully charged at about the time the car goes out. I can see a scenario where the car doesn't get charged first thing in the morning as the powerwall is charging, then the powerwall becomes full at about the same time as the car goes out and then we export to the grid until the car comes back as we have nowhere to put the surplus power.
The best way round it I can think of is to manually force a charge of the car first thing in the morning so there is no solar left over to charge the power wall.
I am assuming that time based control and balanced mode is how I should have it set up, but do correct me if I am wrong on that.
We haven't actually got a powerwall yet, but do have one on order.
We are on a tariff where we get very little for any solar we export, so my objective is always to export as little to the grid as possible. We have very cheap rate power over night and flat (expensive) rate during the day.
Due to the orientation of our panels, (roof faces SE), maximum generation is in the morning.
The Tesla is my wife's car and she normally goes out between 9:00 and 10:00. returning at some point in the afternoon.
What I would really like is for the car to take all the solar until it goes out, and then the solar to charge the powerwall.
What I don't want is for the power wall to grab all the solar when the sun comes up, then the power wall becomes fully charged at about the time the car goes out. I can see a scenario where the car doesn't get charged first thing in the morning as the powerwall is charging, then the powerwall becomes full at about the same time as the car goes out and then we export to the grid until the car comes back as we have nowhere to put the surplus power.
The best way round it I can think of is to manually force a charge of the car first thing in the morning so there is no solar left over to charge the power wall.
I am assuming that time based control and balanced mode is how I should have it set up, but do correct me if I am wrong on that.
It was 25% until last night when I lowered it 15%. Today it's still 100% of solar into battery. I'm at 87% and will hit 100% soon. 100% of all house usage has been from grid today since off peak started at midnight. On the assumption that the system will learn, I'm trying to encourage it to use a lower SOC range by lowering the reserve. So far today there is still no change.
