r/Powerwall

Tesla really needs to sort out their notification priority when there is a grid outage. It's terrible.

In a thunderstorm.

Thought I'd check my Tesla app.

Saw grid is out and power wall is already down to 28% as car was using battery to charge as grid was out.

1. There needs to be a way to stop car charging if Tesla is on back up, or prioritize back up before charging a car if grid is out.

2..SET UP A BANNER OR WARNING Notification TO PHONE WHEN OFF GRID !!!! stupid small banners or notifications are pointless. Set an alarm so I can react and turn down power or shut off car charging

3. How do I have less than 2 hours back up when I'm consuming 0.5 kw and my combined power wall storage is 27 kwh, and if I'm at 28 % I should have over 16 hours left not 2. See image attached.

I have 2 Powerwall 2s and just saw them calibrating for the first time. Install was in 2020. I know Powerwall 3s calibrate because they are LFP. Anyone know how often a Powerwall 2 needs to calibrate.

I've been hoarding my Tesla Solar/Powerwall data the last 3 years without ever utilizing the data in any meaningful way. With all the useful MCP servers coming out for things like Teslamate, Home Assistant, Portainer, etc, I was surprised there wasnt one for Powerwall Dashboard.

I had my Hermes Agent create a MCP server for me and I dockerized it for others to use. Yes, AI helped create this, so use it at your own risk.

Examples of questions (What is my current solar ROI, was cleaning my panels worth it? etc) and responses can be found on the git:

https://github.com/ampersandru/powerwall-dashboard-mcp

Powerwall 3 + Expansion Unit (27 kWh) and a Tesla EV Wall Connector, going onto a single-phase house in Belconnen, ACT. But the batteries aren’t just the interesting part of this pallet. The interesting part is everything else, because that’s the stuff nobody sees on a quote and it’s most of what determines whether the install goes well.

We got a Powerwall 3 + Extension Pack installed in April this year 2026. At first the Powerwall would get to fully charged to 100% which was great! I didn’t have to rely on the grid at all! I live in Southern California, we get lots of sun. Within the last couple of months I have noticed that the Powerwall does not even get to 50% charged by noon time! And we are in the summer time when we are getting more sun than we were getting in April! I’ve submitted a service ticket with Tesla and the technician came to my house last week and said there was an issue with one of the Powerwalls and I should be good. But I did not see any improvement so I submitted another service ticket with Tesla yesterday, so they are monitoring my Powerwall as of yesterday thru my app, they asked me turn on my Service Mode for them.

I keep my reserve at 5% because my purpose is to not depend on the grid, we have outages once in a blue moon.

My household has not changed, I rarely turn on the AC. We are not home during the day. If it gets too hot I will turn on the AC by about 3pm when we get home.

The solar panels are all good too. In April my solar panels produced 1.0 MWh and in July they produced 1.2 MWh. For one day in April they produced 33.6 kWh, And yesterday they produced 35.0kWh energy.

Has anyone had this issue? I hope Tesla replaces my Powerwalls because there is definitely a problem with my Powerwall 3

The first picture is from today and the 2nd picture is from April, about the same time, noon time, to show you the difference.

UK-based.

My PW3 started its first calibration yesterday, exactly 2 months to the day from install (even down to the time it was commissioned). This was a bit of a hole in my research pre-purchase, because I had no idea this was a thing and it was a surprise to find my battery discharging during peak hours and nowhere productive for my excess solar to go (I can’t export for money yet).

It’s been at 0% since about 1am (13 hours ago) and NetZero now shows the true State of Charge as 1%. I assume it will finish soon, but it was a surprise disruption.

I’m using the Powerwall to mitigate costs and not saving it for grid outages, so could really do with avoiding these. How can I reduce the number of these manual calibrations in the future? From research, I’ve seen people say they haven’t had a single one in years, and others getting one every six to eight weeks.

I have never run it 0% before, so is that the problem? Should I keep the reserve to 0% and force discharge it to 0% every 24 hours?

Hello all,

I’ve been using the same set of automations with Netzero for some time now. Until the past few weeks, they’ve worked as expected. I have a 2 PW system, and my goal has been to get the set at or near 100% before expensive power comes in at 4:00pm. Instead of using all the solar to charge the PWs, the solar is getting split between the house’s demands and the battery system. I change the Netzero back to Backup manually, and that holds for a while, then the behavior reverts. Ideas? 💡 Thanks. 🙂

I should’ve made a YouTube video but I didn’t have time. For clarification, I went through all Tesla installation videos on YouTube and the Tesla website. I purchased the Powerwall and Solar panels on Facebook. The Gateway 3 I purchased on eBay. The fact that I was replacing both my old electrical panel and meter made this much easier. I started by laying out where everything was going to go on the wall. I must’ve measured a dozen times just to be as accurate as possible. I used blocking behind the Powerwall bracket for extra support. After installing all the hardware, I temporarily connected the Powerwall to the solar panels and new electrical panel to test it and it worked! I was skeptical since I purchased the Powerwall on Facebook without knowing if it was working. After testing everything I started to make the permanent connections. I used 2/0 Copper wire between the new meter box and the Gateway 3. I also ran 2/0 Copper from the Gateway 3 to the new electrical panel. I used 4AWG THHN from the Gateway 3 to the Powerwall with an 80AMP breaker to support maximum output. I think the hardest part was mounting the unit to the wall. That thing is heavy and had to call my neighbor for help. The solar panels are not mounted anywhere yet. They’re sitting on plastic bins until I decide where to mount them. I started with (4) 495W Trina Solar panels just to test the system. So far it’s been working great. My greatest satisfaction is watching the meter go backwards during the day. I don’t agree with how the electric companies are abusing their customers and that was my motivation for doing this. It’s only going to get worse, but I’ll be ready!

What’s everyone’s thoughts on this new Tesla powerwall lease? Worth it or no?

Hello tesla pw3 support

So I have open case with tesla pw3 for local wifi driver need to be updated. Happened during outage . I can see Tesla ssid and connect but tesla don't see ANY local network and as result I can't connect ( yes I tried even manually it's the same )

It's already one week emails going back and force with no resolution . At some point they even asked me to provide my internet credentials ( really ? Very unprofessional ) .

I can provide my case based on request .

Thank you.

Can someone from support please help to escalate ??

Looks like my Powerwalls have surpassed the 30% degradation mark. They were manufactured in September of 2019, and I assume installed shortly after that. I purchased the home in 2022 and the Powerwalls were transferred to my account at that time. From what I've read, the warranty transfers to new owners. I don't know who installed the system originally. The house had solar installed by Solar City at some point, then the PWs were added after the fact.

Has any one been in a similar situation? How'd the replacement process go? I'm assuming that I just contact Tesla and request warranty service?

Posting this in case it saves someone else some frustration.

For a while, my Powerwall settings kept changing themselves after I changed them in the Tesla app.

Specifically, I wanted:
Grid Charging: Yes
Energy Exports: Solar
I could select those settings and they would appear to save normally. But after a few hours, I would check again and find that they had changed back:
Grid Charging → No
Energy Exports → Everything

I tried changing them repeatedly, reinstalling the Tesla app, etc. Same behavior. At first it looked like an app/firmware bug because there was no obvious explanation for why my selections wouldn’t stick.
The culprit ended up being a Virtual Power Plant (VPP) enrollment.

Turns out I had been signed up for a VPP through my installer (Sunnova which became SunStong) it was separate than the VPP offered by my utility (PG&E). I didn’t realize I was in their VPP. Tesla Tech support recommended unenrolling from any VPP, so I did.

After confirmation from SunStrong of my unenrollment from their VPP I was still was seeing my settings change on their own. It turns out it takes weeks for all the systems to sync up after unenrolling (Sunstrong, Tesla, utility). Eventually they did and now I have full control of my settings again.

So if your Powerwall keeps mysteriously changing Grid Charging, Energy Exports, or possibly other settings on its own, especially if you’ve ever participated in a VPP, I would contact Tesla and specifically ask them to check whether your system is still enrolled in or associated with a VPP

I spent quite a while thinking I had an app, Gateway, or firmware problem when it appears the settings were actually being overridden remotely.