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.
Thanks. That's helpful. I have a pair of Sunpower-branded SMA Sunnyboy inverters (SB6000M and SB8000M). Anyone know if these behave similarly?
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.
Actually from the data @Ulmo has posted, it seems that the Powerwall may be doing something much smarter than the Sonnen. Sonnen just trips the inverter by going to 60.9 Hz. Tesla is doing slow ramp to 60.5 Hz which is the UL 1741 spec to trigger conventional (all-on/all-off) inverters, then a ramp to max 63 Hz which would take advantage of power throttling. We know that the Gateway can measure the instantaneous solar power so that should be a closed-loop ramp of frequency, but people here will confirm that with power-throttling inverters soon (SolarEdge, SMA, or Schneider). We at least know the Powerwall can shift frequency by 3 Hz which captures the typical frequency-shift window which sits 1 Hz above nominal frequency. Not clear if Sonnen can shift above 0.9 Hz, and do it with a closed loop, which would be required for power control. To be fair, there should be an option now for you to tell the Powerwall you don't have a throttling inverter connected, so that it restricts its frequency shift to a minimum range necessary to turn off inverters. However we now have a new spec called UL 1741 SA required in California which builds in this power-throttling capability for the "smart grid." It seems Tesla is capable of meeting this new spec and maybe already does, while the specs posted by Sonnen indicate it cannot (there is also a technical comment to your posted article pointing this out).
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 atwhich shows a graph (8 mins 10 seconds in) of the frequency gradient due to the power wall getting near full, I just wonder what that would look like during a grid cut when solar is starting to generate too much energy for the power wall inverter to handle.
I'm curious: Why would your solar reboot when disconnecting from the grid?
The gateway does not switch the neutral. There is a neutral bar in the gateway that all neutral conductors land on.
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.