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You might get some insight here: New Charging Behavior

For the last 2 days I too am seeing this new behavior. I liked it better the way it was so I’ve switch to self powered mode.

My production has been pretty consistent over the years. 1st set of panels installed 3/09, second set installed 11/19. Attached is the graph...

What is the model # of that Rheem heat pump water heater?

54kWh —> 30 in one month this time of the year? Something is wrong…sure dirty panels will have an impact but there would have to be a thick layer of dirt to have that impact. I too am in Nor Cal. My production a month ago was 63 kWh. Yesterday it was 54.8. And that is with 110 degree temps...

that’s not quite the behavior I’ve been seeing. in TOU, behavior seems to change sometimes for no obvious reason but generally I’m seeing the house pulling from the grid during off peak, during partial peak solar powers the house with excess going to the battery until full then during peak...

Yes. I had to get the installer involved to speak directly to Tesla support. Tesla made some kind of a change on their end to fix it, but the installer doesn’t know what exactly they changed.

I also am Al’s enrolled but don’t see the behavior you describe. In fact it behaves more to my liking now than it did before. I don’t attribute it to VPP but for the past week or so in TOU, solar or PowerWall cover all usage in partial peak and peak and grid covers all off-peak. the behavior...

Not sure how well that would work, depends if power was going to / from the grid at the time the outage happened. If powerwall (or solar) was powering the house when power went out, it wouldn’t be obvious looking at that graph would it?

For me It has been worth the wait and I am enjoying having the system installed. I can’t speak to going with Enphase instead, I would at least look into it. In my case Enphase was not compatible with the panels / inverter that had been installed in 2009.

The only thing I can offer is this has been going on for a long time. I entered into a contract with a 3rd party installer in June 2020. The system was finally installed in December of 2021 - a painful wait all because Tesla was very slow to fill their orders for PowerWall.

I was planning to but ended up not needing to. My 1st application was denied-though they didn’t say why. I think it may have been because although I referenced my physical address, I gave my mailing address (a PO Box). Before calling them, I tried applying a second time using only my physical...

Yes, once you pick a rate plan you should be able to modify it

Perhaps you are correct but that is far below what I get on a 9.5kW system. Granted, all my panels are facing South / Southeast but last Friday I produced 70+ kWh and I regularly get into the high 60s this time of the year (Northern Calif.)

Is it necessary? no. Does it pencil out, not likely in a reasonable timeframe. what value do you place on peace of mind and satisfaction of being able to combat PG&E rates and tactics. Our power went out at 6PM last night, it is still out. Currently estimated to come back on at 10, we’ll...

I’ve spent A Lot of time downloading PG&E data, building pivot tables, analyzing usage & production data, rate plans, TOU vs self generation modes, etc. I’ve gained a lot of insights, but I have to admit at the end of the day I’m not sure I’m any better off than when I started and I’m left...

Not true. I have PowerWall 2s and have the charge from grid option.

My summer rates kicked in on 5/1 too and the system is now doing what you describe even when the battery hasn’t been recharged! Frustrating. I’ve changed to self powered mode to get to behave closer to what I want.

I’m on an Ev-A TOU plan, peak, partial-peak and off-peak. When in TBC (TIME-based control) usually as solar ramps up, it covers house loads with excess going to recharge the batteries until they are at 100%. This time of the year, batteries reach 100% well before peak period when 100% of solar...

just FYI-re a configuration that can work. I have a 200 amp main service and a 100 amp sub panel in a detached garage. All my panels are on the house roof, the inverters and GW2 are installed next to the main panel. The PowerWalls are installed on the detached garage, about 100 ft away.

Same here

need more info. Aside from a possible glitch during a switchover when power was out, were the PowerWalls powering the house during the outage? If so, and the the PowerWalls were close to 100%, as others have said, that is how things are suppose to work. if however the PWs were not close to...

I’m trying to wrap my head around how to use this option from an operational perspective - it doesn’t seem to be a set it and forget it option. If I understand this correctly, when turned on, the grid will only charge the battery when SOC is below the set reserve. But as long as you are...

Yes, my system evolved that same way. I even have different generations of the two systems, one with a single sunny boy inverter and the other with micro inverters. The two systems were installed by different companies too. it all worked out fine but I’d agree if you were happy with the 1st...

I don’t have answers for your interference question, but regarding the sunpower monitoring; I too have two sets of sunpower panels - total size is 9.5kW, one has a single sunny boy inverter, the other has Micro-inverters. I’ve downloaded the production data every month for the past 12 years to...

Have you tested being off grid when the battery is less than 90% and the sun is out to verify your solar will produce, as they should? If not you need to to verify correct operation. When my PWs were installed, when off-grid, the system was shutting down solar production regardless of the...

This has been enlightening. While factual knowledge seems to be scarce, I appreciate all the informed speculation on how this works! thank you

Regarding your comments about a reserve when off grid…of course, I wasn’t thinking that through. I think I understand your explanation of how it behaves, but I’m still left with, “how does it do that”? Once you hit the threshold set for use by the car, the gateway somehow tells the car to stop...

Thanks for the clarification. So that brings up another question. Let’s say your settings are as I describe in my original post: 15% for charging and 50% reserve for outages, and you are off grid, how does the gateway know if the load is coming from the car charger or some other load in the...

I have a Model S and what I assume is a 1st generation Tesla wall charger (2015). i set the Powerwalls to self generation mode with the reserve for power outages at 50% and the “share with vehicle” at 15%, I.e. “save for home use” is 85%. last night the car was charged from the PowerWalls...

I’m having the same issue as of a couple of days ago.

Oddly, today percent self powered data is showing on my iPad but still doesn’t show on my iPhone!

I’m seeing the same problem

I'm updating this in the hopes it can help someone push back on misinformation (from tesla support) about how these systems interact with inverters when off grid. Since my installation two months ago my independent installer, tesla and I have been going around in circles trying to fix the...

Never mind, I found it: Call the PG&E Solar Customer Service at 877-743-4112. There is a touch tone menu item for pending interconnections

A friend had solar (8.5kW) and 3 PowerWalls installed nearly a year ago. He is still waiting for PTO. The independent contractor has been very VERY flaky but at this point all the inspections have been done. However the friend doesn’t have PTO and doesn’t even know if PTO has been applied for...

My system was installed a couple months ago and the go off grid option has never shown up in the app. If I log into the gateway directly, it does show up there.

I’m still observing how the PW’s behave but so far TBC is working pretty well for me. My rate plan is 3 tier. Peak 2PM - 9PM weekdays (3PM-7PM weekends) off peak 11PM-7AM weekdays (9PM-3PM weekends) all all other times partial peak. (No partial peak times on weekends. I’ve defined the rate...

Log into the gateway directly to verify What mode you are in. Others have reported situations wher the app reports one mode, but the gateway reports a different mode.

That sounds like a reasonable guess

I'm in Time Based Control mode, Battery at 85% and charging with excess solar. Batteries will get to 100% in less than 2 hours based on current production. Most of the time it is not drawing from the grid, but periodically it starts drawing ~.2kW - ~.4kWs from the grid for 20 - 30 seconds...

I second that. After I installed one, the inrush amps (i.e. Start-up amps) went from 156 down to 78. Much easier on everything including the compressor.

If as you said the inverters indicate they are still producing solar, you should be able to see where it is going In the app. in the last 3 days mine changed its behavior. Since the install, in TBC mode, the battery only powered the house during the peak period Which for me starts at 2PM. As...

The behavior I see on my system during the afternoon transition to a peak period is; prior to peak, solar goes to the house and any excess goes to the PW if it is less than 100% or to the grid if it is at 100%. once I’m in the peak period, PW handles any house load and all solar goes to the...

Yes, I’m seeing that also.

Update… called support a 3rd time today after power came back on. This person agreed this was not correct behavior. Her diagnostics simply confirmed what I had told her…power goes out, frequency jumps to 65Hz then tapers to 62Hz and stays there until grid comes back on line (8 hours later)...

Called back to support. This time they agreed it should be producing solar. They had me toggle the rocker switches on each of the PowerWalls. That did nothing. She then said they can’t do any troubleshooting until the grid comes back online and to call them back when that happens. what a PITA!

Thanks. It didn’t sound reasonable. How can I best push back on the tier 1 support people who say something with authorit when you know they are not correct? storm watch is currently turned off.

I experienced a grid outage at 1:30 AM last night. Powerwall kicked in as expected. Current SOC is 71% and I would normally be producing solar at this point in the day. However, PowerWall is keeping the frequency at 62Hz Keeping the inverters offline. I called support and Tesla said this is...

After my PowerWall installation, going off grid caused the PowerWalls to shift Hz to ~65 shutting down the inverters regardless of the battery’s SOC. After nearly 2 months Tesla came back and said I needed to upgrade the firmware (for some reason it didn’t do it on its on its own). After the...