Join The Community

Range extender for Tesla S

Range extender for Tesla

I know Tesla will never have a range extender in their cars.
Till now, the best range externder was announced for Audi A1 E-Tron. Small Wankel engine below the back seats as secondary engine.
Or this one from 1979 :
Even better solution would be super powerful RSE Rotary Stirling Engine, which would work on any kind of fuels, solar heat, or both at the same time. Of course it would work in silence at high RPM, only to recharge the batteries. Range of these cars would be 2000 miles.


I don't think so, if you care about distance driving.
A small engine used as a generator is a much better solution than charging stations of any kind.
Do it right and you can drive almost forever. When Tesla decides to build a truly mass market car (way in the future) I'll bet they'll go this way unless they have a 2000 mile battery.

A 100 gallon fuel tank in a 25 mpg ICE would give be equivalent to a 2000 miles battery. Technically it is no problem to put a 100 gallon tank in an ICE - but nobody offers that solution because nobody needs it.
The equivalent to all of todays ICEs would be a 120 - 160 kWh battery (~500 miles) - that is the sweet spot for personal transportation ( after 100 years development the ICE industry came to that conclusion). The beauty is we are only one or two steps away from that perfect battery.

@JaneW - What's the point of having that kind of range when you have to stop for a pee and a snack every few hours anywa? Or are you one of those travelers that keeps 2 bottles on hand, one to drink from and one to pee in?


Do you really want a motorcycle engine with 9 liters of gas 'helping you charge almost indefinitely'? That's how the i3 turns 90 into 180. TBNT.

As for the Stirling using solar, you need God to hover a magnifying glass over you while you drive. Total solar energy falling on a car is enough to keep a cart with 4 bicycle wheels in motion. In the Australian desert, at noon.

Never say never ... i3 has range extending engine, here is how I see range extending rotary Stirling engine RSE : on the car roof is solar collector, which brings hot liquid to RSE, which can also works on any kind of fuel at the same time. Benefits of this small engine which works only on high RPM are : uses also solar power, any kind of fuels and it works quietly.

Heh, and a ton of insulation so that solar actually manages to heat something with all the air going past it and quite bad aerodynamics with the collector I'm pretty sure you end up losing power with that. A lot of power.

You also need collector size of Hindenburg to collect enough solar radiation for it to be any use for a car. Or God to hover a magnifying glass over you while you drive.

Don't need it, in a couple of years we will be having 120kWh batteries, and then 150kWh, which will be plenty for any car, so prices will start dropping as production rises.

The Model S has a range extender option. You can get the 85kwh battery instead of the 60.

Yes I know this, but average driver goes to a long trip longer than 1000 miles at least once a year, in this case range extender could looks like this :

I know it is funny to have electric generator in a trailer behind the car, maybe there is also a better solution, but we do not know for it right now ... aha, maybe you could rent a trailer once a year ?

I think you are missing one "if" in there. Average driver definitely doesn't do over 1000 mile trips once a year.

@ttoomm1 - in first place the trailer is a range reducer because it increases drag and roll resistance. If you want go that direction then Volt and I3 are much smarter solutions.

Tesla already comes in many areas with a "range extender". It is called a "supercharger".

+1 generubin

The only range extender I would ever want is a bigger battery.

And if battery swapping ever becomes a real option, then I would probably be fine with sticking to with my 85kWh battery and only swapping temporarily to some huge 1000 mile battery for a trip, and then getting my 85 kWh one back later.

I like the idea of a range extender. It seems to me that another option would be a triple A like fleet of response vehicles that provide essentially a mobile supercharge. If you need a charge you arrange to meet a mobile charger at a specific locale. Obviously, this option could also be useful for the owner that inadvertently runs out of juice (the equivalent of running out of gas).

Really there will be no excuse to run out of charge on the road. The computer knows where your are and where the chargers are and can make increasingly strident suggestions about what you had better do.

Why not use solar panels to relieve the battery and to extend the range of the EV? How far is that technology? Like in the movie Looper.

You might get one mile more if you cover entire roof with solar panels. In a good day. With imaginary perfect solar panels you could get whopping four miles.

Based on what information?

see other thread:

Of course it is not a realistic car but it must be possible to get more then four miles.

For real car, not really. Safety (crumble zones), rolling resistance with real tires, capability to actually go uphill and a bit rougher terrain (gravel), able to have some cargo besides people be able to go during winter and nighttime and you have a car that is quite different than that "car".

"that kind of range when you have to stop for a pee and a snack every few hours anyway"

On long trips we often go 500 to 600 miles in a day, sometimes more. You go 300, pee, get gas and lunch, go another 300 get gas and find a motel and restaurant for the evening.

Go from Denver to San Francisco, or Chicago in two days.

For the next few years it will be more practical to have a small generator in an electric car than try to find superchargers every 200 miles, especially in the middle of Nevada or Iowa.

Small generator = gasoline 'range extender'. Not the Tesla Way.

I'm still trying to figure out how many charging stations are in Texas. The next major city from Dfw is more than 200 miles away. It sounds like the p85 may make it to Austin.
Most of the ICE cars I have owned made it around 350 miles per tank. We aren't very far from that with Tesla's current technology.

Practical but not probable. If you're driving a Tesla, you'll just have to wait until the Superchargers cover your favorite routes. Until then, keep you favorite ICE.


I think the best way to tackle this would be to add an optional solar pack feature. It would be something inlaid into the car solving the issue of losing range while the car is parked and possibly extending driving range a few miles. It' not a game changer but I think it would sell and reduce the chance of bricking the battery.

Horribly expensive per Wh.

There are weight penalties for carrying too much "just in case" items with you, whether it is an oversized fuel tank or the kitchen sink (and other such, in mobile homes).

It would seem that battery swap would be the answer for trying to cover 600 miles per day.

Hum? 80% in 45 minutes out of approx 265 miles is 212 miles. Two of those takes only one and half hours. That's 600 miles right there (initial 200+ and two SC stops). For 8-10 hour trip it only adds 1.5 hours.

X Deutschland Site Besuchen