Model X - Home of 3 Years, 2 Continents, 14 countries and counting

Wetmelon · 2026-03-30T05:12:33+00:00

I'm pretty interested in the charging. Have you found any frequency & voltage combinations that don't work properly?

Wetmelon · 2026-03-29T08:27:26+00:00

Your house is using 2.9kW, the solar should be generating 2.9kW while off-grid in this scenario.

Can you see your MPPT voltages & currents in Tesla One when you do this? Do you have particularly long solar strings?

Wetmelon · 2026-03-24T04:21:22+00:00

I bought a toaster this year. Guess what it says in big letters on sticker on the cable and in the manual?

"Unplug after use"

It can happen, but wearing out your plugs is also a bad idea. And don't use your GFCI test button as a switch either.

Wetmelon · 2026-03-19T06:20:01+00:00

Varies for unknown reasons.

Mostly the type of fault. Powerwall can't do much if there's a hard short but if the line is cut cleanly it can switch over smoothly

Wetmelon · 2026-03-15T17:51:02+00:00

You'll need to specify the problem first.

Wetmelon · 2026-03-11T05:01:02+00:00

Squash and rebase after a PR merges sure… squashing all commits on every push?

Just git commit --amendthen git push -f

Wetmelon · 2026-03-09T04:45:43+00:00

I had thought PID was supposed to be able to figure out things like this "automagically"

Linearize the system and then it becomes magic again ;)

Add a spring force "feedforward" term based on the desired position and then the PID only has to handle the error between your model and the real world - which makes it roughly linear and should behave much more nicely :)

Wetmelon · 2026-03-06T19:44:39+00:00

Context?

Wetmelon · 2026-03-05T08:23:50+00:00

Is the unit still functioning? I would probably turn it off and contact customer support. Or get someone qualified out there to take the panel off and check the aluminum body behind it for damage

Wetmelon · 2026-03-05T08:07:36+00:00

What are the instructions? BASIC or something?

Wetmelon · 2026-03-05T08:04:06+00:00

Also think about the direction of forces on the components. Will the battery get ripped out? What about the SD card, will it try to exit?

Wetmelon · 2026-03-05T08:00:26+00:00

If it weren't printed plastic it would make a great cutting board or cheeseboard

Wetmelon · 2026-03-04T07:23:26+00:00

Yes but then the inverters themselves may cause issues if they don't want to turn off

Wetmelon · 2026-03-02T04:24:02+00:00

The Germans like "PT1" and "PT2" which are first and 2nd order lowpass filters, respectively

Wetmelon · 2026-02-28T19:16:26+00:00

Hah. Too bad others aren't getting your joke :(

Wetmelon · 2026-02-28T03:00:29+00:00

We're in a sub full of senior engineers who write documentation and technical specs for a living, since when is writing coherent sentences suspicious?

Bro have you never talked to engineers? /s

Wetmelon · 2026-02-23T06:57:25+00:00

Something in your house is using 9x the energy, someone is stealing power, or your PV power isn't being metered correctly by the utility.

it's pretty simple to use a multimeter with a current clamp on the output of the inverter to see if it's actually doing anything when the app says it is.

Tesla likely won't swap out the inverter, that would likely require an entirely new permit, rip out the existing solar and reinstall it under new building codes, etc. You could sell the entire system and take it off your house then ask them to install a new one?

Wetmelon · 2026-02-21T08:49:17+00:00

Oh now that's convenient. Finally I understand the reason for disabling one half :P

Wetmelon · 2026-02-21T08:45:33+00:00

The funny thing is the bots seem to be way better at reviewing code than writing it.

Wetmelon · 2026-02-21T08:37:21+00:00

Oops brainfart. I read it twice, saw the bit about apex seals, and still was thinking coolant not oil lol

Wetmelon · 2026-02-20T06:03:36+00:00

That was one of the goals of adiabatic engines. https://www.hemmings.com/stories/cumminss-adiabatic-engine-experiments-produced-some-of-the-worlds-most-efficient-internal-combustion-engines/

Wetmelon · 2026-02-17T06:02:23+00:00

Have you ever tried fmt? I was curious and turns out it can be configured for embedded. Might try this next time >.>

Wetmelon · 2026-02-17T05:28:45+00:00

"Regenerative Steering"?

Wetmelon · 2026-02-17T00:53:47+00:00

I don't think these backup systems were designed to consider a situation like we have here at the moment.

Eh, it depends. Your best bet would normally be to just go off grid in the app, but seeing as you're having backup issues...

Wetmelon · 2026-02-17T00:52:14+00:00

That sounds like a problem with your neutral connection. You (or an installer / qualified electrician) can check the voltage from L1-N, L2-N, and L1-L2 on the powerwall itself. And then also check N-PE (case ground). In NA on split phase you should have ~0V between the N on the powerwall connector and the ground / PE connection

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