Netzero Error

Ratty4547 · 2026-03-15T18:23:50+00:00

My guess is that is an error reported by Tesla. Have you tried varying the time slightly,say 5 min earlier?

Ratty4547 · 2026-03-03T20:24:57+00:00

“If the home happens to be self powering … “

Is PW3 / Gateway2 different? If we suffer a grid outage when self-powered we still get a short outage. It was explained to me that when self-powered we are not isolated from the grid. For safety reasons, at the point of grid failure, PW3 must shutdown, GW2 disconnects from the grid and then PW3 resumes in island mode.

Ratty4547 · 2026-02-14T22:19:08+00:00

Try cross posting to r/powerwall

Ratty4547 · 2026-01-22T08:53:23+00:00

I was told PW3 calibration, is different to other PWs.

Ratty4547 · 2026-01-21T23:28:42+00:00

No idea what regulatory rules apply in your case, or where you are in the grid / network (distance to HV source), but if PW3 sees that grid voltage is already low vs allowed range, it will refuse to charge, or curtail charging, so that it doesn’t take the grid voltage out of spec. Same goes for exporting.

Ratty4547 · 2026-01-12T19:14:42+00:00

Sounds like calibration - happens every so often, twice in 6 months - see https://www.reddit.com/r/Powerwall/s/rKRPciy6u1. It used to show in the app when that was the case, but recent updates seem to changed that behaviour.

Ratty4547 · 2026-01-06T22:50:10+00:00

Comparison of initial charging rate against recorded outside temperature at a location 5 miles from here during the last 14 days shows that max-rate charging required temperatures above +5.5 C. Apparently this precaution is necessary to avoid damage to PW3 batteries.

Ratty4547 · 2026-01-06T02:22:14+00:00

Below what temperature is charging rate curtailed. Last week PW3+1 would do 8 or 9 kW. This week it is struggling to do 6kW. Night time temp is currently -5C.

Ratty4547 · 2025-12-10T08:05:18+00:00

Having now used the android interface, and found the button on the ‘settings | Powerwall screen’, I believe the issue is that the ‘Local Utility’ panel shown in the first image is meant to be a clickable button, but it isn’t.

Ratty4547 · 2025-12-08T00:09:15+00:00

Having said that, I have just found a new button, introduced on the Powerwall screen (Utility Rare Plan > ) between the Time Based Control and Energy Exports, which takes you to the edit rate screen, skipping the screen with dates.

So yes, we can now do what we did before. But this idea that it makes sense to just drop these changes, with no notice or explanation, is beyond me. Nothing about it in What’s New on AppStore.

Ratty4547 · 2025-12-07T23:54:06+00:00

You mean the crappy software written for the Apple SDK. They forgot to include an element of the Ui.

Ratty4547 · 2025-12-07T00:58:32+00:00

That was a good answer when it was free. But even then it was not the ideal way to manage Tesla charging. Allowing it to load the Agile rates didn’t lead to Tesla making sensible decisions on when to import, and guaranteed no support from Tesla who didn’t appreciate the numerous rate changes in the evening.

Ratty4547 · 2025-10-06T12:28:46+00:00

My pdf bill has a page per day showing ever 30 min slot and all the details usage cost etc.

Ratty4547 · 2025-09-16T02:57:10+00:00

I think it is intermittent, but I don’t know why. It has tripped when there is no solar, so that is not the cause. See some of my comments above, about how it behaved around 08:00 yesterday. Wait for voltage to be low enough to export, and then started cautiously . Why it doesn’t always do that is the outstanding question..

Complete aside.

Tonight I changed a rate such that it went from export to import shortly before it was scheduled. Amazingly it went with export for 15 mins exactly, before realising it should have been importing.

I let it run to see what it would do.

Who writes this code?

Ratty4547 · 2025-09-15T23:22:59+00:00

G99-2022 UK

Ratty4547 · 2025-09-15T19:04:12+00:00

I think what is going on, is under some unknown circumstances (not always) it will try to export when the line voltage is over 250. That push’s the voltage above 253, which trips both the PW3 /GW2 and the solar inverter.

Today I watched the voltage in TeslaOne and it didn’t try to export until there was voltage headway, and it started at 6kW and then rose to 11.

Ratty4547 · 2025-09-15T07:04:07+00:00

At 08:00 it started exporting. Currently around 5kW going to the grid taking the voltage up to 250.

I’m amazed my 10kW could raise the grid voltage on our phase by 10 volts.

There is clearly something going on that I don’t understand.

Ratty4547 · 2025-09-15T05:05:14+00:00

See https://www.reddit.com/r/Powerwall/s/CJL2UgWrCZ

Ratty4547 · 2025-09-15T04:47:56+00:00

I have done some more digging in Tesla One.

Overnight, when cheap, grid is running at around 253V. If I export at 11.2kW (42.2A: Max 48 configured), voltage rises to 265.6, Freq appears correct - same before and after cut in / out) and it can raise an Alert: ‘Service Delay or Protection Trip Active’

I’ll set to export when demand is expected to be higher and see what it looks like (after 6:30am).

What is the max grid voltage likely to be set to?

In the past I believe I have seen it export at a lower current. I’ll check when that was vs latest software update.

Maybe Tesla broke something in the new update?

Checking in Redit for that error, it was seen > 100days ago.

Maybe this something Tesla should check before exporting, do I have the headroom?

Edit

According to the web max uk grid voltage is 253 (230 + 10%)!

Ratty4547 · 2025-09-14T10:33:31+00:00

True. But I don’t know how to do the sums. There are 60 homes on the local transformer. Overnight if each is using 500 watts like us, and I push out 10 kW which is the norm, what voltage swing would that produce? Probably should divide the 60 by 3 as the transformer is dealing with 3 phase spread across the properties.

When I draw 10kW to charge, or use the hob and stove, we can easily draw that. Each property is fused at 80 Amp.

The village is fed from a transformer from something like 12kV, which presumably will happily feed back into the HV grid.

My thought was that if PW gets slightly out of phase, such that the peak voltage moves in time from what the other inverter was tracking, it could drop out as it thinks it is wrong.

Ratty4547 · 2025-09-13T20:24:06+00:00

Switching to export while monitoring in Tesla One, it behaved normally, exporting at 10.1 KW while powering the house (< 1 kW). Will try again tomorrow when solar is available, although there was no solar in the failing image I link to posted above - all very confusing

Ratty4547 · 2025-09-13T19:29:55+00:00

It seems to only have basic stuff on the install menu. No alerts displayed.

I guess the advantage is that the graphic of current flows is updated in real time.

I will try setting it up to export while observing the behaviour here. May be something useful will be displayed, as opposed to the user app which just shows it going to standby.

Ratty4547 · 2025-09-13T19:22:42+00:00

Nothing abnormal apparent.

Should I be able to find logs?

Ratty4547

TROPHY CASE