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

Time-Based Control?

Does anyone have access to the "Time-Based Control" mentioned on the powerwall support page?

Time-Based Control | Tesla

From the Powerwall home screen in the Tesla app, select Customize and then Advanced Time-Based Control. Within this mode there are two strategies ‘Balanced’ and ‘Cost Saving’. Balanced uses stored solar to power your home when electricity is expensive and after the sun goes down. Cost Saving uses stored low cost energy to power your home when electricity is expensive, maximizing your savings.
 
Not yet. As of today for Powerwall App Version 1.12.0 (Tesla App 3.3.1) on android, only the following two are available: Backup Only and Self-Powered.
Screenshot_2018-02-10-15-34-53.png


Time based control is "coming soon". Looks like the FAQ is updated to show the new feature. I am very excited and look forward to TOU use.
 
  • Informative
Reactions: BJReplay and gene
So what this document is suggesting is that if you do have solar, you do not have the ability to charge from the grid at all. All the TOU does is automate what many of us do now via changing our reserve % on self power mode. It does not provide the ability to do rate arbitrage beyond shifting solar generation during partial peak hours to peak hours. If this is indeed true, then the economic case for the powerwall just got diminished greatly.
 
  • Like
Reactions: SoundDaTrumpet
This is good news. The "Advanced Time-Based Control (Cost Savings)" operating mode is exactly what I was expecting from Tesla Energy. I have noticed two areas of deficiency:

1. Ability to limit discharge only to peak times. This can be easily worked around by not having a shoulder time in the evening. (e.g. off-peak starting at 9PM instead of 11PM for PG&E EV rate schedule). This is a small nit.

2. Ability to charge from grid with attached solar. Not interested in this for the first 5 years of Powerwall operation because I am planning to claim the Federal Incentive Tax Credit (ITC). This is a nit that I hope will be worked out.

I will be looking forward to the "Demand Response Participation" feature in the future. I believe this feature alone with greatly enhance the return on investment for Powerwall.
 
  • Informative
Reactions: Ampster
2. Ability to charge from grid with attached solar. Not interested in this for the first 5 years of Powerwall operation because I am planning to claim the Federal Incentive Tax Credit (ITC). This is a nit that I hope will be worked out.

Yeah, hopefully for other markets they are taking into account the difference between USA rules and the rest of the world. This isn't applicable to Australia for instance.
 
  • Like
Reactions: SoundDaTrumpet
I'm testing my (windows service based) time based control - looking promising but early days, and it is a hack that works for me:
  • If next day's insolation forecast is less than my normal peak usage (not enough sun to re-charge powerwall sufficiently to cover peak usage), it pre-charges between midnight and 7am (off peak hours) by setting the mode to self consumption, but the backup reserve percentage high enough so that the combination of pre-charge and expected solar output should fill the powerwall sufficiently to then match evening consumption
  • It turns it back to self consumption mode between 6:40am and 7am (regardless of whether it has charged sufficiently to avoid charging on peak rates (sets reserve percentage back to 5%)
  • If it has pre-charged sufficiently, or an updated solar forecast indicates sufficient solar generation, it sets the backup percentage back to 5%
It is pretty rough - it doesn't do anything to predict tomorrow's peak consumption (based on like days / day of week) - it just uses an average I've logged and calculated as a program setting.

Similarly, it doesn't predict overnight and early morning consumption either when working out if it needs to pre-charge to avoid peak consumption early in the morning, it just uses an average I've calculated as program settings.

That said, it is pretty cool to see it detect the need for pre-charging, set the reserve percentage high enough, and see the powerwall start charging from the grid :)

Once it is working reliability enough for me to share a public alpha, I'll do that.
 
  • Like
Reactions: dlieu and liuping
Once it is working reliability enough for me to share a public alpha, I'll do that.

I look forward to seeing the alpha version and all the ones to follow. Not sure how much help it will be for most of the US folks since if they have solar they can't charge from the grid (at least those that are getting the tax credit) but we Aussies will certainly appreciate it :) .
 
  • Like
Reactions: BJReplay
e.g. PV+battery with no grid charging ability
Hi Anthony, not sure what you'd be after for something with "no grid charging ability" - that's the only thing it does differently from the current powerwall firmware / app - it pre-charges from the grid so your charge can allow you to ride through peak period on a low solar day. Without the charging, it wouldn't do anything.

What are you thinking it should do?

Not promising anything, but if it's a good idea, happy to have a crack.

Will open source it, so anyone can look and reuse if they want.

Aside from that, running my 0.4 release tonight - I expect to see it pre-charge on Friday night Melbourne time (even though there's no point, because the weekend is all off peak) with a forecast for rain on Saturday and total forecast PV generation of only 9kW for Saturday.
 

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


SUPPORT TMC
Top