Lifestyle
Charging a Tesla Model S Might Be Costing More Than You Think

When you fill up a normal ICE car you know exactly what your costs are for the fuel. With an electric vehicle it is not that simple. There is a charging efficiency factor that comes into play which means that the reported amount of energy used could be understated and lower than the actual energy used. In a previous post I wrote about installing an EKM Digital Submeter on my NEMA 14-50 outlet to measure actual power usage of the Model S against the reported power displayed on the driver’s digital dash display. A month later and armed with more data, the energy loss I’m seeing is larger than I had originally expected.
Test Setup
I charge at home 99% of the time and in the last three months I’ve logged 7,500+ miles driven, one trip to the Supercharger and two visits to the Tesla store’s High Power Wall Connector. I have a professionally installed NEMA 14-50 outlet at home. I’m using the factory supplied Universal Mobile Connector (UMC) as the cable between the outlet and the car. An EKM digital sub meter measures actual draw from the outlet and is accurate to within 1% and does not add any measurable load of its own.
Methodology
On the “anniversary date” of taking delivery of my Model S I recorded all of the pertinent info that was displayed before resetting the Trip A meter. Before driving the next day I record the reading on the EKM meter. That way I’ve got the mileage and the Tesla reported power usage over the period driven. This process will let me see a bunch of information that I plan on tracking over time, as follows:
- Monthly miles driven
- Monthly kWh used as reported by the Model S
- Monthly kWh used as reported by the EKM meter
- Monthly Average energy used
I plan on using this information to look at how average energy used changes as the months/temperature changes and perhaps as the Model S gets more miles on it. While I don’t drive consistently on any given day (test drives, special trips and the like), the numbers will average out and my driving style is not likely to change much after 30 years of driving (yeah I’m getting old but the Model S makes me feel young again!). I also drive pretty consistent patterns of commuting with a lot of miles to the same places which helps average out the special trips to locations with different terrain/conditions. Basically, while the conditions aren’t perfectly stable over time, the averages and data from this real world testing will be pretty accurate.
The Data
The last period (6/21 – 7/21) was my first full period with both the car and the EKM meter. A month of driving and charging, especially with the miles and kWh’s involved is a decent period over which to look at the results versus the 2 days from my prior blog post. Here’s the data: In the above table you can see that the Model S reported 728 kWh used during the period but the meter reported 894 kWh used. This means my charging efficiency is only about 82% and electric usage (and cost) is 23% higher than I may have expected based on the readings the Model S provides. For that month this is an extra $26 of charging cost which is a small number but a notable percentage of the total. The good news is that even using this larger kWh number, the savings versus driving my old ICE car for energy alone comes in at $334 — I’m saving $334/month in gas driving my Model S!
Summary
Research suggests that an average charging efficiency loss ranges between 10-12%. Over this one month period of over 2,400 miles I'm seeing an 23% loss using the standard home charging setup that Tesla recommends. Many people quote an 85% charge efficiency for Tesla, and Tesla's own charging calculator appears to assume a 91% charging efficiency which is quite different than the 82% actual charge efficiency I've measured and significantly worse than the average industry charging efficiency. It would be great to see another Model S owner do a similar test using the HPWC setup at home and see if they get results similar to what Tesla is providing. I'd love to do the test but I'm not quite ready to shell out $1,200 plus electrician costs to get that data -- assuming a cost of about $3,000 all in it would take me over 20 years to break even assuming the HPWC improves my efficiency by 10%. From the results above, my conclusion is that the Model S charging efficiency using the standard home setup is 5-10% worse than other EVs on the market.
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Elon Musk
X account with 184 followers inadvertently saves US space program amid Musk-Trump row
Needless to say, the X user has far more than 184 followers today after his level-headed feat.

An X user with 184 followers has become the unlikely hero of the United States’ space program by effectively de-escalating a row between SpaceX CEO Elon Musk and President Donald Trump on social media.
Needless to say, the X user has far more than 184 followers today after his level-headed feat.
A Near Fall
During Elon Musk and Donald Trump’s fallout last week, the U.S. President stated in a post on Truth Social that a good way for the United States government to save money would be to terminate subsidies and contracts from the CEO’s companies. Musk responded to Trump’s post by stating that SpaceX will start decommissioning its Dragon spacecraft immediately.
Musk’s comment was received with shock among the space community, partly because the U.S. space program is currently reliant on SpaceX to send supplies and astronauts to the International Space Station (ISS). Without Dragon, the United States will likely have to utilize Russia’s Soyuz for the same services—at a significantly higher price.
X User to the Rescue
It was evident among X users that Musk’s comments about Dragon being decommissioned were posted while emotions were high. It was then no surprise that an X account with 184 followers, @Fab25june, commented on Musk’s post, urging the CEO to rethink his decision. “This is a shame this back and forth. You are both better than this. Cool off and take a step back for a couple days,” the X user wrote in a reply.
Much to the social media platform’s surprise, Musk responded to the user. Even more surprising, the CEO stated that SpaceX would not be decommissioning Dragon after all. “Good advice. Ok, we won’t decommission Dragon,” Musk wrote in a post on X.
Not Planned, But Welcomed
The X user’s comment and Musk’s response were received extremely well by social media users, many of whom noted that @Fab25june’s X comment effectively saved the U.S. space program. In a follow-up comment, the X user, who has over 9,100 followers as of writing, stated that he did not really plan on being a mediator between Musk and Trump.
“Elon Musk replied to me. Somehow, I became the accidental peace broker between two billionaires. I didn’t plan this. I was just being me. Two great minds can do wonders. Sometimes, all it takes is a breather. Grateful for every like, DM, and new follow. Life’s weird. The internet’s weirder. Let’s ride. (Manifesting peace… and maybe a Model Y.)” the X user wrote.
Lifestyle
Tesla Cybertruck takes a bump from epic failing Dodge Charger
The Cybertruck seemed unharmed by the charging Charger.

There comes a time in a driver’s life when one is faced with one’s limitations. For the driver of a Dodge Charger, this time came when he lost control and crashed into a Tesla Cybertruck–an absolute epic fail.
A video of the rather unfortunate incident was shared on the r/TeslaLounge subreddit.
Charging Charger Fails
As could be seen in the video, which was posted on the subreddit by Model Y owner u/Hammer_of_something, a group of teens in a Dodge Charger decided to do some burnouts at a Tesla Supercharger. Unfortunately, the driver of the Charger failed in his burnout or donut attempt, resulting in the mopar sedan going over a curb and bumping a charging Cybertruck.
Ironically, the Dodge Charger seemed to have been parked at a Supercharger stall before its driver decided to perform the failed stunt. This suggests that the vehicle was likely ICE-ing a charging stall before it had its epic fail moment. Amusingly enough, the subreddit member noted that the Cybertruck did not seem like it took any damage at all despite its bump. The Charger, however, seemed like it ran into some trouble after crashing into the truck.
Alleged Aftermath
As per the the r/TeslaLounge subreddit member, the Cybertruck owner came rushing out to his vehicle after the Dodge Charger crashed into it. The Model Y owner then sent over the full video of the incident, which clearly showed the Charger attempting a burnout, failing, and bumping into the Cybertruck. The Cybertruck owner likely appreciated the video, in part because it showed the driver of the Dodge Charger absolutely freaking out after the incident.
The Cybertruck is not an impregnable vehicle, but it can take bumps pretty well thanks to its thick stainless steel body. Based on this video, it appears that the Cybertruck can even take bumps from a charging Charger, all while chilling and charging at a Supercharger. As for the teens in the Dodge, they likely had to provide a long explanation to authorities after the incident, since the cops were called to the location.
Lifestyle
Anti-Elon Musk group crushes Tesla Model 3 with Sherman tank–with unexpected results
Ironically enough, the group’s video ended up highlighting something very positive for Tesla.

Anti-Elon Musk protesters and critics tend to show their disdain for the CEO in various ways, but a recent video from political action group Led By Donkeys definitely takes the cake when it comes to creativity.
Ironially enough, the group’s video also ended up highlighting something very positive for Tesla.
Tank vs. Tesla
In its video, Led By Donkeys featured Ken Turner, a 98-year-old veteran who served in the British army during World War II. The veteran stated that Elon Musk, the richest man in the world, is “using his immense power to support the far-right in Europe, and his money comes from Tesla cars.”
He also noted that he had a message for the Tesla CEO: “We’ve crushed fascism before and we’ll crush it again.” To emphasize his point, the veteran proceeded to drive a Sherman tank over a blue Tesla Model 3 sedan, which, of course, had a plate that read “Fascism.”
The heavy tank crushed the Model 3’s glass roof and windows, much to the delight of Led By Donkeys’ commenters on its official YouTube channel. But at the end of it all, the aftermath of the anti-Elon Musk demonstration ended up showcasing something positive for the electric vehicle maker.
Tesla Model 3 Tanks the Tank?
As could be seen from the wreckage of the Tesla Model 3 after its Sherman encounter, only the glass roof and windows of the all-electric sedan were crushed. Looking at the wreckage of the Model 3, it seemed like its doors could still be opened, and everything on its lower section looked intact.
Considering that a standard M4 Sherman weighs about 66,800 to 84,000 pounds, the Model 3 actually weathered the tank’s assault really well. Granted, the vehicle’s suspension height before the political action group’s demonstration suggests that the Model 3’s high voltage battery had been removed beforehand. But even if it hadn’t been taken off, it seemed like the vehicle’s battery would have survived the heavy ordeal without much incident.
This was highlighted in comments from users on social media platform X, many of whom noted that a person in the Model 3 could very well have survived the ordeal with the Sherman. And that, ultimately, just speaks to the safety of Tesla’s vehicles. There is a reason why Teslas consistently rank among the safest cars on the road, after all.
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