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@aesculus The number of fleet homes in your screenshot suggests to me that it is showing DSGS participation. It will be interesting to see what happens this evening. Just curious, have you tried deleting the app and its data, power cycling your phone, and then reinstalling the app? All the...

PG&E came by and a new monitor was installed. It is the same make and model, but a different unit. According to the lineman, the prior monitor was DOA when hooked up for download in the shop. The logger captures voltage, current, and power at 1Hz. It has no ability to capture short transients...

Yes, that is certainly one way to do it. Or just use one of the available relays in the gateway to drop the generator. It was previously supported for off grid, after all. I think that there is a strong belief at Tesla to promote sustainable or renewable solutions, and I can see how support for...

@furuike Congratulations on being a customer of one of the older utilities in the US! Having 10-20 homes of a larger neighborhood transformer seems a little unusual, and may explain why the voltage is up. Have you checked your voltage after dark evening and morning and compared that to peak...

PG&E update: Apparently the data logger that was installed for eight days failed to record any (useful?) data. PG&E has a plan to install a different kind of logger, but no date was communicated to me. I don't know how to interpret the plan to install a different brand/type of data logger. That...

This has been covered in other threads, but the electrical challenge is how to taper and shutoff the generator well before the batteries are full so there is never power pushed into the generator, something generators aren't designed to handle. Then there is the renewable energy component. As...

Can you post a picture of the specification plate on your Powerwall +? Do you know how your Powerwall is programmed, e.g. which grid/voltage settings it has? What utility provides your power? Is your house on its own transformer? What is the grid voltage in non-solar hours, e.g. 21:00-22:00 and...

Yes, adding a tiny bit of surge to your 42kW load, and I could easily see how your breaker could trip. Even as a sustained load, 42kW, aka 175A is asking a lot of everything, breakers, wiring, bus bars, etc. Isn't the overcurrent rating normally 125% of the sustained load, and 125% of 175A...

I have a slightly different perspective. For a device that is connected to the internet, Tesla has gone to quite a bit of effort to make sure that our Powerwalls aren't easily accessed by anyone other than the owner and Tesla. To me, that is above average for an Internet of Things device, and...

🤞 Good luck. We are seeing glitches as well that seem not grounded in reality, so I'm also hoping that this update fixes my issues as well.

I'm certainly seeing spiking, but I don't know the cause either. Non-Tesla solar.

I would contact US sales, and see where you get to, with the expectation that they will bump you over to Canadian sales. I would also try a Canadian Powerwall enquiry at the same time. My bet is that someone just forgot to put Megapacks as an option on the web page since Tesla has done a number...

@CrazyRabbit So, yes, I have taken electronics, and I have been responsible for power quality and provisioning professionally, though I am not an electrician. I do know one end of a screwdriver and DVM from the other, and I have had front row seats for more than a few power oddities over the...

PG&E came and pulled the data logger. The very nice troubleman said it was the oddest combination of symptoms that he has seen in twenty odd years in the area. As we chatted, we watched the voltage steadily rise at the meter, despite the fact that the exported power was staying constant. That...

Sounds great! Any chance to tie into more granular data, e.g. microinverters? All the best, BG

Always happy to learn. Do you have a link to that Fronius feature? I'm not finding it. I guess that we had a good installer. Our microinverters are well mapped. Like @sunwarriors there was essentially no price difference for microinverters when we had solar installed, so to me, trading up from...

Do you have a reference for that efficiency number? @Vines makes some great points about the ROI for the added cost of microinverters that I think are completely valid. Despite those points, I wanted and have microinverters, knowing the extra cost, for two reasons; 1) longer MTBF (mean time...

Or different inverter / microinverter brand...

Congratulations ! I would try rebooting your phone first, and then if that doesn't work, try uninstalling and reinstalling the app. If not, I'm afraid it is back to Tesla...

Thanks for correcting my math! Since the meter is "revenue grade" it is supposed to be more accurate than that, but that doesn't mean that this meter is. I can confirm that the meter voltage matches my DVMs, and matched the current of the clamp on Fluke meter when it was at 6.kW export, so I...

It certainly could be a bad connection on the service drop. The utility has futzed with it several times; once to replace a transformer that blew (lightning, followed by a floating neutral issue a year later that killed it), and then a year later to replace some (all?) of the service drop due to...

@wwhitney Thanks. To answer a few of the questions; The house was disconnected by opening the main service panel 200A system breaker to the meter. (and it had been off for about 70 hours) It was 6:30am, so no solar, no export, and the normal minor house loads totaled 0.6kW, double checking on...

Update: PG&E still has the power logging monitor on our meter. More odd voltage behavior; the house was off-grid Friday afternoon through Monday as precaution against solar storm induced voltage variations. With the house isolated, the voltage at the meter matches two other meters a mile...

Well there is already, off grid. The TEG has no issues communicating with our Enphase hardware to alter production up or down, as needed, via frequency shifts.

No worries! I've been burned a few times, so I try to remind myself to double check where posters are before responding. ;) All the best, BG

Unfortunately, that is a North American number. The OP is in Portugal... Tesla lists a slightly different number, +35 1800180397. All the best, BG

In off-grid mode, the way the Gateway adjusts the solar production is by varying the frequency. That is a design and regulatory feature, developed not to have to run communication cables to panels, or via zero crossing signals.

Quick update: PG&E came out and load tested the service drop, and then did a load test of the transformer and medium voltage line (by ramping up to 700A/phase, in short bursts). Both passed. He added a power analyzer to log data for a week and then it goes off to engineering, so probably no...

Yes, always on their end.

I worked at a location where the local utility used to throw a switch at six every morning, causing a 1-3 second power loss. The computers on our machines did not take the drop out at all well. I ended up putting in an enormous ferroresonant automatic voltage transformer to store enough energy...

Update: voltage is back up today. This feels like it is going to be an adventure... Same glitches in the solar curve; bright sun, no clouds either day. All the best, BG

That's very helpful! Any suggestions on what to look for in a power line monitor / data logger, or particular models? Since I won't be earning a living with it, I'm a little reluctant to shell out $4k+ for one. I haven't used one in decades... All the best, BG

Background: for the last six months or so, we have been having "over voltage" excursions, i.e. more than 250V AC at the meter. It took me a while to realize that the system response on one of UPS units was caused by it detecting an over voltage situation and going into a protective mode to...

Definitely many ways to skin a cat, and the more the merrier!

Sorry, I did miss that, but the particular utility matters, too. I suspect that PG&E will have a proximity issue to the gas line/meter for the proposed location in the first photo. The line diagram, and your second photos seem consistent with what has gone through. A 60A breaker supports a...

If you have specific concerns on some piece of electrical hardware that is specially sensitive to transients and harmonics, then I think the issue is about isolating that piece of equipment. If this is a general solar specific concern, I would have no concerns about harmonics and transients...

Can you update where are you located? The utility and the authority having jurisdiction matter for many of your questions. California? PG&E?

Storage is good, but I think that there are other, perhaps more cost effective options. To my way of thinking, it doesn't have to be just storage, rather more ways to absorb excess/low cost production; e.g. production sensitive EV charging levels and rates, building preheat/precooling...

The US has a more complex regulatory structure, but I hope that it will come to the US sooner rather than later. The UK has had time of use pricing for decades, historically largely for overnight heat and hot water. Texas has dynamic pricing for some plans for some time, and during the 2021...

Our experience is similar. FWIW: While we are in the same general area, the discharges here also seemed more nuanced in 2023, with varied rates. I remember one in particular that seemed as if it was designed to demonstrate some level of production, as the date and time of the event did not...

That makes sense. Thanks for clarifying . When living in a cold climate, we used to vent the dryer inside. Yes it does add considerable moisture to the house, but that is often a good thing in the winter time, or at least was for us. The more challenging issue was designing a large, fine lint...

That's true, but the energy is used mainly to evaporate water from clothes (cooling the dryer air), and then the water is condensed and drained, and the refrigerant is compressed, and the warm refrigerant is used to warm the previously cooled dryer air. A little energy is lost due to friction in...

Gorgeous! Yes, I can see that if your geothermal needs back up resistance heat, that could be a significant issue. If the geothermal runs 0.7kWh (16kWh/day) what creates the other 64kWh of load? I'm used to seeing heating dominate in NH in winter. I would be tempted by a diesel generator, and...

What is your question?

This is a bit sideways, but have you looked at adding insulation? E.g. windows, insulated window coverings, attic, walls, etc.? For winter outages, I think it is either, suffer, or wood heat and candles, or a generator. The latter requires a transfer switch and does not play well with...

Out of curiosity, how close is that the the yellow energy label on your water heater? (Make/model?) All the best, BG

@Matt-FL Thanks for sharing the wind direction and speed data. People have done (small) studies with forced ventilation under solar panels. In every case that I have read or seen, the energy gain is much larger than the energy used in the cooling fans. It is one reason why ground mounts are...

Even a water heater in a conditioned space is significantly warmer than the area around it, and thus the water heater does have significant energy losses. I think that every water heater should have an extra insulation blanket on them. The blankets are cheap, installation is straightforward and...

To save more energy, I think that you will like a heat pump model, but I would ask how close the water heater is to sleeping spaces. They are noisier. You might want to double check the energy use on that dryer; is it a pure heat pump or a hybrid model? Whirlpools aren't terribly efficient...

Any given panel has a decrease in output per degree of temperature rise at the panel. Typically, it is in the range of about 0.5%/deg C. There is every reason to suspect that the panel temperature is not linear with respect to outside air temperature, and small changes of wind direction and...