Ulmo
Active Member
Has anyone else experienced this? Does anybody know what the reset button does? My PowerWalls are stuck in this mode; the app says 15% reserve, but they're behaving as if they have 90% reserve, still, after another full day.
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Powerwall 2: Technical
- Thread starter Aussie
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- Powerwall Tesla Energy
Ulmo
Active Member
I set the reserve to 10%, and at 1:33AM, they started behaving again. The Tesla App is buggy: it will fail to set the reserve very often, and sometimes, it doesn't know this, and thinks it set the reserve, but didn't, and then the pack doesn't operate properly. Bad programming to begin with: it shouldn't show false status.
Bye2Gas
Member
Scott Weston in Australia posted a few videos of his Powerwall 2 installation which has SMA hardware and it appears to work just the way that you would like.
Steve
Ullmo, I am having a related issue, I think. PW2 Firmware version 1.9.0, app version 3.2.0. What I experienced 2 nights in a row:
• Even though app was set to Backup-only overnight (I manually change it anywhere from 11pm-7am depending on if I wake up in the middle of the night or stay up late) the PW2 would not charge from the grid. This happened 2 nights in a row.
• I set it to Backup-only then tried going back to Self-powered and back again later in the day. Nothing I do changes its behavior. It will charge from solar but not from the grid. Changing the setting, quitting the app and restarting, trying on a different device - nothing works.
• I’m on PG&E in Oakland and I assume you’re PG&E too in Aptos?
I emailed Tesla Support yesterday morning but may have had the wrong email. Just now I emailed powerwallsupportNA at tesla dot com - previously I emailed the same address with no NA. They’ve responded quickly to the NA email in the past. I’ll let you know if they respond later today.
Joe
• Even though app was set to Backup-only overnight (I manually change it anywhere from 11pm-7am depending on if I wake up in the middle of the night or stay up late) the PW2 would not charge from the grid. This happened 2 nights in a row.
• I set it to Backup-only then tried going back to Self-powered and back again later in the day. Nothing I do changes its behavior. It will charge from solar but not from the grid. Changing the setting, quitting the app and restarting, trying on a different device - nothing works.
• I’m on PG&E in Oakland and I assume you’re PG&E too in Aptos?
I emailed Tesla Support yesterday morning but may have had the wrong email. Just now I emailed powerwallsupportNA at tesla dot com - previously I emailed the same address with no NA. They’ve responded quickly to the NA email in the past. I’ll let you know if they respond later today.
Joe
Sorry to be reviving such an old post, but i found it by chance and the only one i could find to do with ramp of frequency. Do you know of anything new in this space? I have a single power wall 2 and 5.7kw of solar on the roof (SolarEdge HD5000) which supports Power Frequency gradient reduction of production. I'm looking at adding a second 5.7kw of Solar X1 Boost which does not support any frequency ramp from what i can find.
What I'm wondering, the single power wall can support 7.8kw of charge at any point, during grid tied connection it will export any excess, however if i was producing max power output from the solar and a grid disconnect occurred, my solar would reboot and wake after 60 seconds, however how quickly will the Tesla tell the Solar to ramp down (even if battery was not full) due to the inverter receiving too much energy? would it at all? I know the SolarEdge would ramp down if it were told and the Solax would just cease to generate power if the frequency was too high; but i'm just wondering if the Powerwall will modify its frequency due to too much solar generation?
There is a video at
Not a PW tech, so take with a grain of salt:
The PW charger / inverter-in-reverse operates independently of the solar power output. If the battery is full, it will not charge it further. So the case is not the inverter receiving too much energy, but rather the line voltage going too high from the excess solar output. The solar inverters will have their own cut offs for line over voltage also.
If the system is running in grid disconnect mode, the output frequency should always be adjusting based on the battery SOC and line voltage. So to your question, fairly instantaneously.
I'm curious: Why would your solar reboot when disconnecting from the grid?
My SolarEdge sees a grid fault and turns off, then after 60 seconds wakes up; i suspect it notices the 50ms or what ever it is outage.
I have another address with 2 powerwall2 and 2 solar edge HD5000's and they behave the same way
Thanks for the info. Thats what it looks like from the pictures - my intuition says the system should completely disconnect from grid in a power outage because in a short situation some current can return via neutral.
Or does the ground and neutral tie-in in the main breaker box prevent that scenario? So no current goes to grid neutral when in a micro grid backup scenario.
The power company transformer only has two hot phases and neutral. Neutral becomes earth ground at the main service entry via the ground rod and bonding clamps. If you remove both phases, there is no longer any circuit for current to flow through.
You may be thinking of a generator set up where the generator may be earthed separately with neutral and ground connected (generator as sole power source). In that case, the neutral should also be switched when changing power sources. (You do not want two neutral/ground connection points)
Solar/ powerwall do not bond neutral to ground, so no issue there.
(There is one case where you could get current on the neutral during island mode, but it requires two faults, a specific transformer set up, is low current, and only impacts your local service)
