Good and bad about using a 12v fridge on a Tesla road trip

On road trips many people like to have a cooler. For my most recent trip I graduated to getting a 12v compressor fridge, a real fridge that, in theory, needs no ice. I presumed that in an electric car, with a giant battery, running the fridge would be no problem (it uses up only about 2 miles worth of range electricity per day.)

That turned out not to be the case due to a bad way the Tesla 12v system is designed. I wrote up this story of the ins and outs of using a fridge in a car, and how to fix the 12v problem in this new story on


Aboard the Energy Observer, a French hydrogen/solar/wind powered boat

I got a chance to visit the Energy Observer, a French boat powered by solar and wind with hydrogen energy storage as it visited SF while sailing around the world.

Hydrogen doesn't work so well in cars, but it can make sense in other places like aircraft, trucks and grid. But what about on a boat?

Read my analysis at Aboard the Energy Observer, a French hydrogen/solar/wind powered boat


Can EV charging be a business?

Gas stations are a business -- they sell gasoline at a profit. But EV charging isn't like that, and almost no EV charging stations are run with the primary goal of selling electricity at a profit to customers.

Some want the business, but will it work? Is this a temporary or permanent situation?

I explore that in my new Forbes site article at Can EV charging be a business?


Aptera's new car is incredibly efficient, but the solar panel on it is convenient, not green

Aptera, which has been trying for many years to make a successful efficient electric car, is now taking orders for a vehicle which uses only 100 watt-hours/mile to travel, compared with 250 for a Tesla Model 3 and more for others. That's a big deal.


Gig-drive companies win fight to not make drivers employees -- what does that mean?

While we've all been obsessed with the big elections, some notable news in California, where a corporate sponsored bill to reverse California AB5 on gig-drivers passed. AB5 would have required drivers for companies like Uber to be employees and not contractors.

What would Uber have done if it had not passed, or what can they do if an employee rule passes somewhere else? I discuss these issues in a new story on


Uber and Lyft will go all electric, but a lot has to change first

Uber, following Lyft, announced a big push towards electric rides, declaring all rides will be electric by 2030. That's a good goal, but as I outlined earlier, there are reasons your Uber is not usually electric today. They need to find ways for lower-income drivers to own electric cars and a place to charge them overnight, and also briefly during the day, and we have to wait for the cars to get cheap. I outline the issues in this new article on


The Ambulance of the future will fly, but will it use hydrogen?

I'm fairly convinced that soon we'll see ambulances switch to e-VTOL flying machines. So many advantages, hard to see downsides. Nobody is going to complain about noise and privacy issues of an ambulance. This announcement by an e-VTOL company and an air-ambulance company of a collaborative project is thus interesting, if preliminary. However, it's also interesting that they view hydrogen as the fuel. H2 has lost in cars, but has some positive attributes for planes, particularly an ambulance.


Slower chargers (2KW and 50KW) might be better for EVs than 7KW and 250KW

In EV charging, there's a big contest to see who can be the fastest, with 250KW and 350KW chargers competing with Tesla's superchargers. But charge-really-fast is "gasoline" thinking and it's much more expensive. For the same money, for example, a corporate parking lot would be better served with 40 Level 1 (2KW) chargers and 4 Level 2 (7KW) than 15 Level 2. And a new generation of cheaper 50KW chargers in places we stop for an hour could make more sense than 250kw ones.


Car Companies Are Making Ventilators, But Ventilator Companies, Hackers And CPAP Companies Are Working Harder

If you read my earlier report on efforts to convert CPAP machines into ventilators with new firmwware the good news is that the feared massive ventilator shortage seems (for now) to have been avoided.


Home delivery when shopping stops in a virus shutdown

If we shut down public areas, we're going to need a lot of online shopping and home delivery. How can we do that in a virus-infected world? Here's some plans for how to make it happen even with gig workers (who aren't driving Uber and Lyft much any more.)

I outline some of the ways to make it work in this article.


In car navigation needs to learn to shut up

I think driving navigation is a great thing, but the UI is all wrong. It needs to work to understand me, to see the routes I have driven with it 100 times, and only tell me when there is something unusual I need to know, not where to turn to get to my house (or telling me "You have arrived at your destination" at my driveway.) The ideal navigation system, on a commute, won't even say a word to me unless there is traffic that means I should not take my standard route. How do we make it smarter?


A solar panel on an electric car is probably false green

Hyundai has put a solar panel on an electric car. Turns out that's "false green" and may end up using a lot of the solar energy to cool down the car after you park it in the sun. What do the economics on solar panels in cars look like?

See Hyundai puts a solar panel on an EV but it's probably false green


Tesla and NHTSA fight over what safety scores mean

Tesla advertised that the Model 3 is the safest car ever based on NHTSA's tests. NHTSA wrote them a letter saying, "stop saying that, you can't compare these scores across different weight classes."

Here's some analysis of who is right and why Tesla wins in the end at NHTSA and Tesla spar over safety claims


How RV Parks can exploit a new market of EV road trippers

RV parks already have the infrastructure for charging electric vehicles on road trips. They just need somewhere decent for the road trippers to sleep and they can exploit a whole new market. Some already rent little cabins. If they add glamping tents they can serve customers at a low cost and could quickly fill out the many gaps in the EV trip network. In my new Forbes site article, I outline the things they could do, and give some advice to drivers too.


Carpool lanes don't work, and carpool cheaters might be helping your lane go faster

Ever watched solo "cheaters" go by in the carpool lane and been angry? Turns out carpool lanes don't really work and often make congestion and throughput worse, which is why they are converting them to "HOT" (carpool+toll) lanes where they can, to let enough solo drivers in to properly use capacity.

Turns out carpool cheaters create a similar result, and if the fines and enforcement are tuned, they can pay a similar amount.


Would a rental battery pack be a better choice than a super-long-range electric car?

When you buy an electric car, you can often choose among various battery sizes. The larger your battery, the more range you have -- and you may get some extra performance -- and the longer your pack lasts, but the extra capacity is very expensive and adds weight to the car. The truth is, most people only need the extra capacity of a long range car when doing road trips. A modest 150 to 200 mile range car is sufficient for driving around a town, depending on the town.