Eric Mann

Software Engineering, Tesla 2018-2025.

[Eric Mann @ericdmann]

Tomorrow at 2:30 PM PT, we pull the plug on the grid. No end date.
Just the sun, @Tesla Powerwall + Powershare, and stubbornness to see how long we can last. ☀️🔋

We built a live leaderboard, so you can watch every minute of it.
👉 https://t.co/qqtjW60Fga

My setup:
☀️ 14 kW solar
🔋 2 Powerwalls (27 kWh)
⚡ Cybertruck with Powershare @teslaenergy
🚙 Model Y

Late October here in Idaho means short days, gray skies, and cold nights.
Going head to head with @PatchesHQ and @JoshuaThePilot.

[MFAM Tesla @JoshuaThePilot]

Tomorrow at 4:30 PM CT, my home is unplugging from the grid. No end date. ⚡️

✈️ I'm an airline pilot, gone 3–4 days at a time, so my wife holds down the fort with our 6-year-old, 2 bulldogs, and a tank full of fish.

My setup:
☀️ 20.3kW solar (50 panels)
🔋 1 Powerwall 3 + 3 Powerwall 3 expansions (54 kWh)
⚡ Cybertruck with Powershare (110 kWh usable, 10% limit)
🔌 Total storage: 164 kWh
🚙 2026 Model Y for my commute

Part of a team of Tesla owners taking on the challenge with @ericdmann and @PatchesHQ 👊

Illinois in late October means short days, clouds, and cold nights. Daily updates with real numbers and weather.

Follow the live clock 👉 https://t.co/EYb70Gtd89

How long do you think we last? 👇 @Tesla @Tesla_Energy

[Eric Mann @ericdmann]

@DotMcCarthy @haiway That’s an awesomely large setup!

[Eric Mann @ericdmann]

87+ hours off-grid, and we’re still going!
Yesterday brought a surprise sunny day after an overcast forecast.

🚨 We uncovered our first issue in the system! Something is preventing us from capturing all the available sun into the Powerwalls or home usage. Even well below 50% charge, solar generation is erratic and jumpy. The screenshot shows the Powerwall discharging mid-day, in full sun, to cover home loads while we’re generating under 2 kW of solar. A few minutes earlier, that number was well over 8 kW.
Tesla and our installer are both looking into it, but you can see how much sun was missed under the curve! Hoping for a fix soon!

🔋 Pretty incredible that even with this issue, we haven’t had to touch Powershare on the @cybertruck. That’s all built into my own energy automation system, which predicts 7+ days of off-grid capacity even with the incoming forecast. We shall see 😎

🚗 We added a mileage tracker to the leaderboard, so you can see how much each of us has driven as part of the overall energy demand picture.
https://t.co/fkT55v5rRd

Rain and clouds are in the forecast, plus upcoming travel. Probably a good thing, because so far @teslaenergy has made this too easy!

@PatchesHQ @EdInTheBush @JoshuaThePilot @haiway

[Eric Mann @ericdmann]

And yes, this was an all electric operation.

[Eric Mann @ericdmann]

@herzel77 love it!

[Eric Mann @ericdmann]

Who else isn't rockin' a front plate on Cybertruck?

[Eric Mann @ericdmann]

@mar_kura beautiful

[Eric Mann @ericdmann]

@KerbalNut exactly

[Eric Mann @ericdmann]

And yes, this was an all electric operation.

[Eric Mann @ericdmann]

Pulling out the stops! A good opportunity to take out a couple more trees that were causing midmorning shade.

[Eric Mann @ericdmann]

@DotMcCarthy @Tesla Sent ya a DM!

[Eric Mann @ericdmann]

Tomorrow at 2:30 PM PT, we pull the plug on the grid. No end date.
Just the sun, @Tesla Powerwall + Powershare, and stubbornness to see how long we can last. ☀️🔋

We built a live leaderboard, so you can watch every minute of it.
👉 https://t.co/qqtjW60Fga

My setup:
☀️ 14 kW solar
🔋 2 Powerwalls (27 kWh)
⚡ Cybertruck with Powershare @teslaenergy
🚙 Model Y

Late October here in Idaho means short days, gray skies, and cold nights.
Going head to head with @PatchesHQ and @JoshuaThePilot.

[MFAM Tesla @JoshuaThePilot]

Tomorrow at 4:30 PM CT, my home is unplugging from the grid. No end date. ⚡️

✈️ I'm an airline pilot, gone 3–4 days at a time, so my wife holds down the fort with our 6-year-old, 2 bulldogs, and a tank full of fish.

My setup:
☀️ 20.3kW solar (50 panels)
🔋 1 Powerwall 3 + 3 Powerwall 3 expansions (54 kWh)
⚡ Cybertruck with Powershare (110 kWh usable, 10% limit)
🔌 Total storage: 164 kWh
🚙 2026 Model Y for my commute

Part of a team of Tesla owners taking on the challenge with @ericdmann and @PatchesHQ 👊

Illinois in late October means short days, clouds, and cold nights. Daily updates with real numbers and weather.

Follow the live clock 👉 https://t.co/EYb70Gtd89

How long do you think we last? 👇 @Tesla @Tesla_Energy

[Allen Patch @PatchesHQ]

Tonight, after 3 Days and 4+ hours I become the first one to connect back to the grid….but not because of the reasons you’re thinking.

I will be willingly connecting back to the grid with over 80% battery still available on my Powerwalls.

Reason for connecting back to the grid: We need to charge our 3 Tesla’s during off-peak hours at the full charge rate. Being off grid for extended periods of time does not give us the charging freedom we are used to especially when it comes to charge rate.

[Eric Mann @ericdmann]

@PatchesHQ @teslaenergy 🫡
Super fun! Good to be along for the ride with you on this challenge!

[Eric Mann @ericdmann]

@VoltronCT Taaaaaallllll!

[Eric Mann @ericdmann]

@ExitPlan Come off-grid with us!

https://t.co/7U2vcjeKQB

[Eric Mann @ericdmann]

@Rural_MT_EV @cybertruck Never had it out that cold! But it does have a battery heater :)

[Eric Mann @ericdmann]

Thinking about getting another one of these this winter...super bonus is that it always stays charged in the bed.
What toys are you hauling in the back of your @cybertruck ?

[Eric Mann @ericdmann]

@James_Powerwall @haiway Love that idea! Miles driven will be on the leaderboard soon :-)

[Eric Mann @ericdmann]

@mike_hambrecht It’s a good one!

[Eric Mann @ericdmann]

Off-Roadster

[Eric Mann @ericdmann]

Off-Roadster

[Eric Mann @ericdmann]

@TeslaPatriot Gosh, that looks awesome!

[Eric Mann @ericdmann]

@mike_hambrecht Amazing!
Gotta give credit to @PatchesHQ , who turned me onto it!

[Eric Mann @ericdmann]

I did end up unplugging our backup Starlink connection. Roughly 30w saved 😂

[Eric Mann @ericdmann]

64 hours in, and you may spot a trend in our overnight Powerwall charge (charts in next post). Sun was minimal yesterday, and looking about the same today.

We haven't had to tap Cybertruck's Powershare yet, so a lot of battery capacity sitting still.
A few notes below about our usage 👇

[Eric Mann @ericdmann]

@achilles1169 So good!

[Eric Mann @ericdmann]

@haiway Yes, we wanted to be able to have zero external reliance for things like gas

[Eric Mann @ericdmann]

64 hours in, and you may spot a trend in our overnight Powerwall charge (charts in next post). Sun was minimal yesterday, and looking about the same today.

We haven't had to tap Cybertruck's Powershare yet, so a lot of battery capacity sitting still.
A few notes below about our usage 👇

[Eric Mann @ericdmann]

Tomorrow at 2:30 PM PT, we pull the plug on the grid. No end date.
Just the sun, @Tesla Powerwall + Powershare, and stubbornness to see how long we can last. ☀️🔋

We built a live leaderboard, so you can watch every minute of it.
👉 https://t.co/qqtjW60Fga

My setup:
☀️ 14 kW solar
🔋 2 Powerwalls (27 kWh)
⚡ Cybertruck with Powershare @teslaenergy
🚙 Model Y

Late October here in Idaho means short days, gray skies, and cold nights.
Going head to head with @PatchesHQ and @JoshuaThePilot.

[Eric Mann @ericdmann]

@PuaPuaNow 😬😮