How Tesla's Powerwall carried me through Hurricane Ian

By Nakatomi2010
Tesla's Powerwall carried me through the post Hurricane Ian power outage
Tesla's Powerwall carried me through the post Hurricane Ian power outage

Back in 2017, I was in a home with solar panels, but no battery backup. Hurricane Irma passed overhead, and I found myself without power for 24-48 hours. We lost all of our food as a result.

When the storm passed, I called up the company that installed my solar panels and found that adding in a battery would be cost-prohibitive, as it would require replacing the solar inverter. As my wife and I started shopping for a new home for our family, I kept this information in mind as I had planned on having solar+battery put in at the new house. I worked on finding a home that would be oriented properly to get the best solar collection capacity, and we bought it in 2018.

Once the home was bought I went through the process of getting quotes for solar + battery arrays and ultimately settled on Tesla.

Tesla was largely chosen because, at the time, the Powerwall battery had the shortest cutover time in the event of an outage. It kicks in right away, while the others took 2-3 seconds to switch over.

By the end of 2018, the array and Powerwall were installed and operational. The array has a max output of 9.425 kW using a SolarEdge SE7600H-US inverter, which has a max output of 7.64 kW, and a single Gen 2 Powerwall 2. During the design, I chose not to have the HVAC and car chargers run off the Powerwall.

As Hurricane Ian approached, Tesla's Storm Watch kicked in on the Powerwall.

The Powerwall started charging to 100% about two days before the hurricane made landfall. I debated on letting the Powerwall’s power get used leading up to landfall, but having been through hurricanes before, I opted to let Storm Watch do its thing. As the hurricane approaches it’s not uncommon for the winds to cause power stability issues. Leading up to the hurricane the power blinked numerous times.

By the afternoon of September, 28th people in the Tampa area were already starting to lose power.

At around 4:15-4:30 pm, as the winds outside were getting stronger, my wife and I decided to start making dinner for the kids. For reasons unknown, we decided to cook some things that involved the stove. At 4:42 pm the power blinked, and the Powerwall took over for about 5 minutes, putting us back on the grid at 4:47 pm. Once back on the grid the Powerwall charged back up to 100%.

At 5:03 pm on September 28th, the power went out again. After making dinner, we turned off the appliances and watched Andor on Disney+.When it was over I looked at the Powerwall’s status and found that we were now down to 91%.

Tesla's Powerwall showing the amount of energy left

There was a notice that said we had about 8.1 hours of power remaining, I started to cycle through the things in the house that consumed power and began shutting them off, either at the breaker box, or by unplugging them, intending to ensure there was enough power to keep our fridge, and a chest freezer in the garage online.

I was able to get us down to about .3-.4 kW of use before going to bed and hoped that was enough. Things that were turned off were the water heater, the dishwashers, computer gear, TVs, etc. Anything that might have vampire drain in the long run, including the internet gear.

At around 7 pm yesterday, two hours after the power had gone out, Tesla sent me an email with the VIN for my new Model Y.

I couldn't help but chuckle at their timing.

I woke up the next morning, September 29th, at around 6:30 am. I had to connect to the Powerwall directly to check the stats since I had powered down the internet gear and Gen 2 Powerwalls don’t have cellular connectivity any longer due to AT&T's 3G network being shut down earlier this year. I found that the Powerwall was down to 46%.

Tesla's Powerwall showing the amount of energy left
Amount of energy left

By this time the storm had moved beyond my area, and I went outside to start inspecting for potential property damage and such. Thankfully, we were spared property damage. The most we had was a panel that covers the service box for our internet cables get blown off the side of the house. I found it about 4 feet away and put it back on.

Others in the community I live in were less fortunate. Several smaller trees had been tipped over, some homes had shingles blown off their roof, and in at least one case a tree had fallen on top of a vehicle.

At 8 am I checked to see how many people in my neck of the woods were without power and found that the total increased from 21,2000 to 292,247 as the hurricane moved away.

The day after a hurricane is a tricky one, particularly if the hurricane is a big one because there’s still a lot of cloud cover. By around 8:38 am the Powerwall was at 36% charged and the sun was barely peaking out around the clouds, resulting in a lower power generation rate.

About 30 minutes later, at 9:10 am, enough sun was shining through the clouds for the Powerwall to start charging.

35% would be as low as the Powerwall went during this event.

As the day went on, we used power sparingly, mostly trying to ensure our mobile devices were charged. We used a microwave and a toaster oven to make breakfast, and at around 11 am I got a chuckle at my impact card showing 0% grid usage.

Tesla Solar's Impact card
Tesla Solar's Impact card

By lunchtime, the Powerwall showed Storm Watch was over, and the Powerwall was charged to 68%.

So we again used the microwave and toaster oven to make lunch and feed the family.

At around 1 pm the Powerwall started to hit around 80-85% charged, and we started running into an issue with generating power. Every time the Powerwall generated more than 5kW of power, we got an error that read “DC VOLTAGE NOT SAFE! DO NOT DISCONNECT! VDC 445.4”

Followed by another “Error code 18x40 AC Freq too high”

Powerwall charging error
Powerwall charging error

And then it would go to “Waking up…” and start a five-minute timer. Once the five-minute timer was done, the cycle would repeat, the array would generate 5 kW, give an error, and reboot.

I tried to open a support ticket with Tesla, first using the Tesla app. I started a chat session with someone who immediately disconnected the chat session saying “Weather-related issue”, as I was not on the grid.

Irritated, I re-opened the chat session and got a different person who worked with me.

Initially, the individual claimed that the issue was related to the overcast sky, however, that wasn’t the case as the inverter *does* shut down when there’s a lack of sunshine. In this case, it was shutting off every time it hit 5 kW generation. While still on chat support I used a different mobile device to call Tesla's solar number. I received different answers from the chat advisor and the representative on the phone.

Chat support said that there did appear to be an issue and advised me to schedule a service ticket, and ended the chat.

The person on the phone took the time to explain to me what was happening, and ultimately resolved the issue. The Powerwalls are limited to 5 kW of intake. As I only had one Powerwall, once the array generated more than 5 kW of Power, the Powerwall was changing the frequency to tell the array “Whoa, stop, you’re giving me too much power”, which would reboot the array for five minutes, and repeat the cycle.

The solution to this issue is rather amusing.

You have to use more power to use the excess energy that the array is generating.

Armed with this new information I turned back on the dishwasher and the water heater, and started doing dishes, taking a shower, and watching TV. We eventually found a happy medium where we were using enough power to have the Powerwall stop shutting off the array and continue charging.

From 2 pm to 4 pm we greedily used power, but at 4 pm the intake wasn’t as good anymore as the sun was starting its trek to go below the horizon.

Tesla's app shows the amount of energy remaining

After the dishwasher finished, I turned the water heater and dishwasher back off and started going back to “low power” mode as we began making an early dinner, again, using the toaster ovens, and an air fryer.

We took some time to eat our food while watching TV, catching up on Paramount+’s Lower Decks, and Disney+’s She-Hulk, and we started turning things off again.

By 6:22 pm the Powerwall reached 98%. The sun finally went low enough on the horizon for power to stop being generated.

By the end of the day when we getting ready for bed, we still had no power.

By 2:15 am, on September 30th, I awoke to go pee, then sat on the edge of the bed and decided to check the Powerwall’s state of charge. I found it to be at 45% and heard a rumbling outside the bedroom door that turned into a roar.

After initially thinking it was an Amazon plane flying overhead, I got up and checked the thermostat to find that the HVAC had turned back on again. After checking the Tesla app again I found that power had been restored.

Tesla Solar's Impact card
Tesla Solar's Impact card

Looking at the Impact card to try and see how long the outage was, I realized that Tesla’s app doesn’t seem to know how to handle an outage that’s longer than a day.

The power went out at 5:03 pm on Wednesday, September 28th, and ultimately returned at 2:17 am on Friday, September 30th. A total of about 32 hours being off-grid.

What would I do differently? Tough to say honestly.

Having to go to the garage to flip breakers to reduce or increase the power load was annoying, putting in a Smart breaker panel would’ve been beneficial, but only so long as we had internet access.

A second Powerwall would’ve been very beneficial as it would have allowed me to not have to increase the power load to ensure the Powerwall kept charging properly, as the power would’ve likely been split between them. If and when Tesla sells Powerwalls without requiring solar with it, this is an option I’ll be investigating for sure, as long as it isn’t cost-prohibitive. I’m uncertain if you can mix and match a Gen 3 Powerwall with a Gen 2 under a SolarEdge inverter.

Not having the HVAC, while unpleasant, wasn't a huge deal. After a hurricane clears out of an area, you’re generally left with a lot of cold air, so we just opened the windows for a bit. Having EV chargers was also a non-issue because we didn’t drive anywhere, and the cars only lost about 2-3% charge, mostly from me opening the Tesla app and accidentally waking up the cars while trying to scroll to the Solar card.

Tesla Launches Robotaxi: Features, Robotaxi App, Command Center and First Impressions [VIDEO]

By Karan Singh
@DBurkland on X

After years of anticipation, the wait is over. Tesla's Robotaxi network officially launched with its first public rides for early access users in Austin, Texas, on Sunday, June 22nd.

The launch was a veritable firehose of new information, revealing everything from the booking process and in-car experience to new FSD features expected in the next version of FSD. Here’s a complete recap of everything we learned from what is sure to be a historic first day.

The Robotaxi App

The experience begins in a new, dedicated Robotaxi app. For now, access is invite-only and that app is not available in the App Store. Invitees received a special link to download the Apple-only app onto their device. Once you’re in the app, you’re asked to log in with your Tesla account, which will then bring over all your settings from the Tesla app, such as your profile photo and payment details.

While the app is only available for iPhone users today, an Android version is already confirmed to be in the works.

Booking a Trip

Once you’re in the app, you can set your destination and hail a ride. Once you have a ride booked, the app provides live tracking of the approaching Robotaxi, including its exact location and the estimated time of arrival.

One limitation noted by early-access testers is that the pickup point is currently fixed, and you can’t change it. The pick-up location will be relatively close to where you requested the ride, but some users noted having to walk up to a block to get to the pick-up location chosen by the app.

After initiating a ride, your phone will display a Live Activity, providing an auto-updating view of your taxi's location and ETA. This is similar to the Supercharger Live Activity that Tesla launched recently.

The Live Activities on iOS for the Robotaxi App
The Live Activities on iOS for the Robotaxi App
Joe Tegtmeyer on X

In-App Tips

While many early Robotaxi users are expected to be Tesla owners, Tesla is creating a user-friendly experience by offering in-app tips, such as how to open the Model Y doors.

When your ride arrives, its exterior lights pulse, letting you know this vehicle is picking up a passenger at the given location. This helps it differentiate between other Tesla vehicles on the road and other Robotaxis potentially dropping someone off at the same location.

The helpful tip on how to open the door handles.
The helpful tip on how to open the door handles.
@DirtyTesLa on X
The exterior lights pulse prompt in the app.
The exterior lights pulse prompt in the app.
@DirtyTesLa on X

Information Synced to Robotaxi

To get that special Tesla touch of magic, once your vehicle arrives, it automatically syncs the rider’s personal vehicle details to the Robotaxi.

That means when you go to play Spotify, YouTube Music, or other media, you’re already signed in and it’s using the same account you use on your own personal Tesla. Even Netflix and other video services are signed in, so that you can start streaming them in the back seat.

Inside Robotaxi: UI & Controls

The hub of the passenger experience, for now, is the 8-inch rear touchscreen of the new Model Y. The UI is clean and simple, displaying the trip map, estimated arrival time, and controls for media and climate.

The screen also provides passengers with access to key safety features, including a large “Pull Over” and “Support” button. For the early access program, a human Safety Monitor sits in the front passenger seat and has access to one additional control on the main screen - Stop in Lane.

Once you’re inside the vehicle and have fastened your seatbelt, the ride doesn’t begin immediately. You must tap the “Start Ride” button on either the rear passenger screen or within the Robotaxi app for the vehicle to start moving.

@DBurkland on X

The Ride and Geofence

One of the most important questions is: How does it drive? The first impressions have been overwhelmingly positive. Early-access riders have mentioned that FSD’s performance is extremely smooth, noting that it handles turns, speed bumps, and stops with a new level of grace. While FSD V13 is already incredibly smooth, Tesla may have tweaked it for this Robotaxi version, or it could be taking things a little slower with the initial rollout.

The service operates within a defined geofence in Austin, which initial reports suggest takes about 30 minutes to go from one side to the other.

Interestingly, you can actually book a trip that has a destination or start point outside the geofenced area. In these cases, the Robotaxi will simply take you to the edge of the service area or choose a pickup location that’s within the service area.

The current service area for Robotaxi
The current service area for Robotaxi
@SawyerMerritt on X

Robotaxi Command Center

The significance of this day hasn’t been lost on Tesla’s teams. Ashok Elluswamy, VP of AI, shared a photo from what appeared to be a launch party at the Robotaxi operations center.

The command center features various TVs showing real-time information from the active Robotaxis. According to what Musk shared a couple of weeks ago, Tesla planned to have 10 Robotaxis on the first day, which aligns with what is displayed on the list on one of the TVs.

Other TVs are showing live views from the Robotaxis’ cameras, displaying six of the vehicle’s cameras, which appear to include the front camera, repeaters, B-pillar cameras, and rear camera. The only cameras excluded appear to be the front bumper camera, the front-facing wide-angle camera, and the cabin camera.

Another TV is displaying a weather radar, while another is displaying a live view of the Robotaxi vehicles on a map. However, one of the most interesting is one near the middle, which is displaying Robotaxi statistics. The display shows that there have been 112 rides across 499 miles as of the time the photo was taken. Another statistic shows a value of 35, but it’s unclear what this number represents. Given the 10 expected Robotaxis, this likely has to do with how many users are queued for a ride, or includes active riders plus users waiting for a ride.

Celebration

Many team members have also taken to X and commented on the significance and status of the launch, celebrating a decade’s worth of hard work finally coming to a culmination. While there’s still a lot of work to do, the launch is a huge first step to Tesla opening up its Robotaxi service to everyone and releasing FSD Unsupervised for customer-owned vehicles.

Check out this smooth start-to-finish ride from Sawyer Merritt:

Next up? We expect Tesla to open up rides to the general public and gradually expand its geofence area. There’s also a new FSD update coming that increases parameters by 4.5x, which should make the vehicles even smoother and more capable.

Tesla Outlines Rules for Using Its Robotaxi Service

By Karan Singh
Not a Tesla App

With the first Tesla Robotaxi rides starting shortly for early access users in Austin, Tesla has published a detailed set of rules for its first passengers.

They outline everything from who can ride to how you can behave in a car with no driver, and are designed to ensure safety. Tesla is using a safety monitor during the initial rollout phases, so the front passenger seat will not be available for customers.

Who Can Ride

Tesla has laid out clear guidelines on who is eligible to be a passenger, as well as some expected in-car conduct.

You must be at least 18 years old to book a ride and to ride alone. Riders are permitted to bring one guest, provided that the guest is also over the age of 18. You cannot book a ride for another person; the account holder must be present for the entire trip. 

That’s all pretty straightforward, and we expect Tesla to relax some of the rules in the coming months. That means that once the safety monitor is gone, the number could increase to three or four.

How to Behave

All passengers must remain seated with their seatbelts fastened for the entire duration of the ride. There is a strict prohibition on smoking, vaping, or consuming alcohol or other drugs inside the vehicle.

Riders are also asked to be courteous and leave the Robotaxi in the same condition as they found it. Those who damage or dirty the vehicle may be charged an additional, currently unspecified fee after the ride.

Hands Off: Driverless Vehicle

This is where the rules get a bit more interesting, focusing on the unique fact that the Model Ys that Tesla is using still have driver controls.

Riders are prohibited from sitting in the front-left driver’s seat. Additionally, riders must not tamper with, modify, or attempt to physically manipulate any vehicle equipment, including the steering wheel and pedals.

Interestingly, Tesla also has a rule on reverse-engineering and intellectual property protection. While photos and videos of the experience are permitted, riders are prohibited from bringing onboard instruments or equipment intended to record, measure, or conduct surveillance on Robotaxi.

Service Animal Exception

For riders with disabilities, Tesla has outlined a specific policy. Only small service animals that are trained to work or perform tasks are permitted in the vehicle. No other pets are allowed. 

However, riders are not required to provide proof; however, support may ask you to confirm that the animal is required due to a disability and what task it is trained to perform.

At this point, we’re not sure whether Tesla will allow non-service animals in its Robotaxi Network in the near future. It would make sense if they did - many people travel with their pets, or need to take them from one location to another - but for now, only service animals will be allowed.

Tesla is definitely taking a safety-first approach in the initial launch, and with the presence of the Safety Monitor, they’re being very cautious. There is a long way to go before the average person becomes comfortable with an autonomous vehicle with no one in the driver’s seat, and building public trust is a good first step.

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