Recent content by cwied

I stand corrected - I did not see a voltage tap connected to panel in my installation, but must have missed it.

"CT" in the sense of how the term is used here generally refers to "current transformer," not "current transducer". This means that it actually measures both voltage and current. The Neurio inside my Tesla Gateway reports both voltage and current from each CT (as well as other stats like frequency).

The export limit only really matters if you're on a VPP or have "export everything" available. Do you have either of these? Without these features, the export to grid is limited by what the solar panels produce and in most US locations the systems are sized so the full solar export is allowed (I...

Nope. As you can see, at worst there were 7 extra discharges in a year through this VPP program. In fact, since I'm on TOU with export everything, they aren't even extra discharges, just time shifts of when the discharge occurs.

37.8 MWh is about 2800 full discharges of the battery. Even discharging the full battery every day it would take abut 7 years and 8 months to hit this limit. As long as the VPP doesn't involve full discharges 365 days a year and your reserve is set to 0%, I don't think a VPP is going to be an...

Generally the Powerwalls are registered, installed and connected to the internet before PTO (permission to operate). They just are configured not to export to the grid until then. It may be worth double-checking with your installers that they are going to do this.

Hour-by-hour is the way it used to work a few years ago when I was a member of OhmConnect. I think it likely that they haven't changed. The 10 weekday and 4 weekend day lookback periods are the same as back then, for example. It should be easy for me to tell at the end of this season if we keep...

Here's an example: https://www.cpuc.ca.gov/-/media/cpuc-website/divisions/news-and-outreach/documents/news-office/key-issues/summer-reliability/copy-of-proposed-decision-in-r2011003-attachment-2-with-track-changes.pdf

You are reading this correctly, but the detail is that it is on an hour-by-hour basis, not over the whole period. You can set your reserve to 100% for the first hours of the VPP event and then set it back down when you usually stop exporting.

No, @Redhill_qik is correct. Tesla applied for "sub-metering" for the ELRP program, which means it's what the Powerwall discharges that matter, not the export to the grid. See section A.4 here...

AFAIK, the baseline is computed on an hour-by-hour basis, so if you normally export earlier, your baseline could be 0.

FYI, the VPP works in a similar way. The compensation is still based on how much you exported compared to a typical day (see here: Emergency Load Reduction Pilot | Tesla Support). The biggest difference is that it is based purely on Powerwall charge/discharge. Usage from the grid is ignored.

Call Tesla support. It may be something like the time zone on your gateway being set wrong so it's generating the wrong time stamps. In any case I suspect it's an issue that can be fixed in the configuration of your system. Something probably went wrong during provisioning.

Historical note: the original app did not do this adjustment. The 5% adjustment was added to the app later when they decided the built-in buffer wasn't enough. The app shows 0 when the battery is actually at 5. It shows 100 when the battery is at 100 . The adjustment is just applied linearly in...

For the California VPP, being enrolled in any other demand-reduction or similar incentive program disqualifies you. I don't know of an exhaustive list, but it does include programs like OhmConnect, smart thermostat programs like SmartAC, etc. Note that taking rebates is fine. I think they're...