I wanted to share a full timeline of a PCS (Power Conversion System) issue I just went through with my Cybertruck, because the way it failed was not obvious at first. This is certainly an increasingly known issue.
This might help if you’re seeing weird PowerShare behavior or charging limitations.
⚡ Phase 1: PowerShare Worked… But Intermittent
During a recent outage, I used PowerShare to run the house.
It worked, but:
- Power was inconsistent
- Loads didn’t feel as stable as expected
- No warnings or errors
My daughter’s were home from school after a closure because of the storm that knocked out power throughout the town. They mentioned the internet was frequently dropping and lights would occasionally flicker. I reached out to Tesla, but they recommended I reach out to my electrician. No response from my electrician, so I decided to see if I could get anywhere with Tesla again.
⚠️ Phase 2: “Unable to Charge” Error (Weeks Later)
A few weeks later I got:
“Vehicle unable to charge”
When I checked the details:
👉 It pointed to a PCS / PowerShare-related fault
So I scheduled a service appointment. In the error log, I noticed it had a second PCS2_a095 error that mentioned PowerShare unavailable.
🔄 Phase 3: It Starts Charging Again (False Confidence)
Here’s where it gets tricky…
I left the truck plugged into my 120V UMC, and about a day later:
👉 It started charging again like normal.
So I:
- Asked Tesla if I should still bring it in
- Ended up canceling the appointment
In hindsight… probably a mistake. However, I also wasn’t confident with Tesla’s response that they knew what the issue truly was.
⚡ Phase 4: 240V Charging Exposes the Real Issue
Several days later, I plugged into a 240V EVSE.
Immediately noticed:
- Charging capped at 24A / 24A
- No ramp beyond that
- Definitely not normal behavior
At that point, I was pretty confident:
👉 PCS issue wasn’t gone—it was just partially failing
So I rescheduled service.
🔧 Phase 5: Tesla Replaces PCS (Now “Rev G”)
Tesla diagnosed it and replaced the PCS under warranty.
- Full replacement
- $0 cost
- New hardware revision for my install: Rev G
Apparently they’ve updated this component multiple times. Ideally this will be a permanent fix. I’ve heard this is several thousands of dollars to fix if out of warranty.
🧠 What Made This Hard to Catch
This wasn’t a clean failure.
It:
- “Recovered” on 120V
- Only showed issues under higher load (240V)
- PowerShare issue was intermittent and I was not able to rule out other potential causes
👉 It gave just enough normal behavior to second-guess the issue.
🔍 Key Symptom to Watch For
If I had to call out the biggest red flag:
Charging capped at 24A on 240V
That seems to be a strong indicator something isn’t right with the PCS.
🛠️ Where I’m At Now (2 Weeks Later)
I’m about 4 weeks into the new Rev G PCS:
- Charging is back to normal
- No artificial current limits
- No errors so far
But I’m definitely watching it closely.
🔁 What I’m Doing Differently Now
Going forward:
- Monthly PowerShare test (kill power → run house)
- Check for 24amp charging limit on 240v charging
💡 Takeaways for Other Owners
If you’re seeing anything weird:
- Don’t ignore intermittent behavior
- Watch for current limits (especially 24A caps)
- Keep your service appointment if something feels off
Tesla had asked me several questions when I first contacted them. They asked if there were any other accessories I had installed on the truck, if I had used the power receptacles in the vault for anything, etc. My rescheduled appointment was nearly a month out. It certainly seems they are more aware of the issue now. Many feel this should be a recall, I definitely agree with the number of failures that seem to continue to pop up.