Welcome to another Tesla Tuesday!
One of Tesla’s strengths is their battery technology. Companies have tried to make EVs for decades, but batteries were always the sticking point. Now that we have crossed an inflection point with the batteries, the EV revolution has begun. But it turns out that there other great uses for that same battery technology too.
A recent video from Wendover Productions does a great job of explaining the complexities of the electrical grid, but a quick summary is that today even though we have more renewable energy in use, things like wind and solar rely on natural phenomenon and make it difficult to match demand. So we rely on fossil fuel “peaker plants” that fire up quickly when demand is high. A more ideal solution would be to store energy, but that’s a challenge. This is where Tesla comes in.
Tesla provides a solution called “Megapacks“. These are effectively giant installations of their batteries that act as buffer for the electrical grid. Some of their installations provide over 1 GWh which is enough to power all the homes in San Francisco for 6 hours. So these projects aren’t generally going to power an entire city by themselves, but used in conjunction with other types of power, it can be that extra buffer under heavy load or when a natural disaster hits.
It doesn’t stop with giant installations though. Every time the power flickers at my house, I wish I had a Tesla PowerWall. These batteries sit on the wall of your house and are generally used in conjunction with a solar installation on your roof. If you have a lot of people in your area with these batteries, you effectively have a distributed Megapack. So Tesla is getting into the business of providing virtual power plants. Each homeowner can feed small amounts of electricity from their batteries back into the grid and get paid for it.
Electric vehicle batteries last a very long time. One Tesla Model S owner is closing in on 1 million miles with only one battery replacement (covered under warranty). But those batteries do wear out eventually. While they might not be up to the task of charging and discharging every day to move a car around, they’re still great for electrical grid use. There was a recent story about someone taking a battery out of a wrecked Tesla and using it in his house for 4 years.
When I read these stories, it’s hard not to think back to battery powered toys of the 80s. Fresh batteries would go into a tiny little device and wear out seemingly immediately. Dad got good at wiring power adapter jacks into all of our battery powered toys to avoid endlessly buying new batteries and we got good at figuring out how to adjust the wall wart to produce the right voltage for whatever we were playing with at the time. Battery tech has come so far that we’re now able to power hundreds or thousands of homes with it for hours at a time. it opens up so many interesting opportunities!
Autonomous Tractors
Twenty years ago, I was going through two summer internships at John Deere headquarters in Moline, IL. The first year there, I worked with what became the Precision Ag group and the second summer I worked in the IT group for the seeding equipment factory line. Both projects were fun, but it has been really interesting to watch that Precision Ag group take off.
When I was there around the turn of the century (might as well just lean into feeling old, right?), Deere was putting their first GPS equipment into farm equipment. At that time, it could show you a screen to help you follow a straight line down your field, record positional yield information during harvesting, and automatically adjust seeding and spraying rates based on your position in the field. It was a lot of fun to work on a computer program and then go test it out in a field! At that time, I heard rumors about a totally autonomous farm that was in development, but their main problem was avoiding surprise obstacles like animals running out in front of the equipment.
This week at CES, Deere announced their autonomous tractor! The farmer drives to the field, tells the tractor what to do and then he can walk away. He can use the phone to check progress or decide what to do if something unexpected happens. I’m sure there will be kinks to work out, but this can be an incredible efficiency gain for farmers who often have to do enormous amounts of work in short amounts of time, especially during planting and harvesting season when they get the right weather. At the beginning, maybe it’s not good enough to let the tractor run all night by itself, but the farmer could at least catch a nap in his truck while waiting for the next intervention point.
If you talked to me senior year of college, I would have told you that I was going to be working for Deere when I graduated. I enjoyed the work and they liked me, but then 9/11 happened and the job market got turned upside down. Deere had a hiring freeze so I ended up scrambling to find a new job and Lockheed was still hiring so I went there instead. I have no regrets about the way things turned out, but I do think I would have had fun at Deere too.