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Twin or Single Chargers

Probably addressed but curious as to the choice most of you have made Thanks.

Single. Can always add later (for a little more) if the need arises. With Supercharger network rolling out.. I can't imagine needing the second charger, personally.

Thank you

Double. I think adding later costs $3800 vs $1500 originally.

After 10,000 miles on our Model S, I can not see any reason for twin chargers. Just more dead weight.

One point people miss is they are only of use with the HPWC. However I have both and have on several occasions used them. The unexpected long range charge scenario where topping up to max range was needed quickly and the long day followed by dinner trip both have happened and the HPWC and dual chargers 60mph versus the 30mph of NEMA-50 plus singles has helped relieve any anxiety over taking the MS as opposed to my ICE. That being said planning can always get you around any of this.

Only have single and have not yet run into a situation where the double would have been useful. I don't think it is worth $1,500 but it depends on how much $1,500 means to you

My understanding is that they're good for any electrical service offering more than 50A--you just need the appropriate adapter. In this period of low supercharger saturation, finding a 70 or 80 amp charger along the way will speed up the journey.

twin charger is good for any electrical outlet/charging station which offer 20kW power supply, so not only HPWC. I don't know how about the US, but here in EU it's quite common to find 3-phase 22kW, so if you live in EU I'd reccomend double, but if you live in the US single is probably ok...

I looked at it this way: the only time I would ever want twin chargers are when on the road and super chargers aren't available. However, outside of your own home where you can set up a circuit larger than 14-50, there are NO public charging systems that take advantage of the twin charger abilities. Therefore, it seemed somewhat pointless.

This would obviously change if you do a lot of driving longer than 2/3 of your battery capacity in a single day. At that point you might want to come home, charge more quickly to be able to get out on the road again with a full charge.

Twinchargers are useful for any compatible AC charging that's between 10 and 20 kW. There are some J1772 public charging stations that charge at 70 amps where twinchargers would be beneficial. Hopefully as time goes on more J1772 installs will have this capability.

"NO public charging stations" offering >50A service?

Too many people have referenced using 70-90 amp public chargers, including J1772, for me to believe that, not to mention Tesla showroom HPWCs and the Roadster HPCs. They are also widely available in Canada whereas superchargers may not be.

This question comes up every couple of weeks. I should put the answer on speed dial.

1. If you buy the twin charger option with the car, the cost is $1,500. If you buy it afterwards, the cost is $3,600. In Washington, you don't pay any tax when you buy the option, whereas the after market cost adds about $400 in sales tax.

2. There are MANY 70+ amp stations out there that will let you take advantage of the twin chargers, but it does depend on where you live and travel. All up and down the west coast is the "Tesla Highway," including Roadster HPCs, Model S HPWCs, and high amp J1772 stations. Take a look at the following map:

Last winter I drove from Seattle to the SF Bay Area and back using ONLY 70+ amp stations, all free. The trip was two days each way, but would have take three or four days each way with a single charger.

Across the southern tier of Canada is the Sun Country Highway:

Virtually all of these stations are 70+ amp J1772.

Many Tesla stores and service centers offer free charging at their HPWCs.

3. It is true that superchargers will eventually be built along some of these routes. However, they are not built yet. In addition, there are many popular areas that will not be served by superchargers. For this reason, high amp chargers are being added all the time. I know of two projects in Washington, one in north central Washington with many stations, and the other on the Olympic Peninsula. Another project with several stations is being added in New York. As new public stations are added, and with the popularity of the Model S, many will be high amp.

Twin chargers will give you greater charging flexibility and let you take advantage of future additions. They are not for everybody, but can be very helpful, depending on where you live and drive.

I think you should take into consideration that charging stations including High Ampere ones are sprouting across the country very fast....only about 2,000 public charging stations in 2011...but by 2,013 in 2 short years they have mushroomed by 10 fold to 20,000 stations!!

@DouglasR +1 Thanks for filling in the details!

The HPWC will charge at 80A; it is currently temporarily defaulted to 60 because some fuse issues had occurred to some people. You can change the setting (each time) to 80 from the screen if you want, until the fix comes through.

I have dual chargers and the HPWC. Also, I've used a 70 amp charger (J1772, but, oddly, it was a Tesla branded device) on the easy coast. So it's helped me on a road trip. Yeah, there aren't a tone of them (well, outside of California?), but here's the thing--there will only get to be more and more of them over time. Maybe not quickly. But for me, getting the dual chargers was partially for now and partially future-proofing. It's not for everyone, but I do not regret getting the dual chargers. (grin&shrug)

I'm glad I got the twin chargers. I've been able to charge at HPWC from time to time. Other than the Superchargers, it is very satisfying to charge at nearly twice the rate of a 14-50 (most of the chargers I have used have been 208V, at 70 or 80 amps).

I think it's only a matter of time before the infrastructure catches up with the number of Tesla's out there.

Superchargers will predominantly be outside the cities and so imagine arriving at a destination, say a high end hotel, and being able to fully charge your battery back in about 4.5 hours and being able to use your car shortly thereafter instead of charging at 6 kw per hour as with the typical 30 amp public stations and therefore taking >12 hours to get your full battery charged.

Future proofing I think is a big argument for twin chargers also. Imagine if Tesla unveils a 125 kW battery in a few years. And, now that battery swapping is a reality, you're able to upgrade your 60 or 85 kW battery to 125 kW. Having twin chargers to fill that bigger battery will come in very handy.... of course, this is all speculation so it really depends on whether you have an extra $1500 to spare. There's really no right or wrong answer, just whatever your gut tells you.

Another part of future-proofing (for us): My other half may get a Model X, or some other Tesla car, at some point. With twin chargers and the HPWC, we could share the HPWC (just move the charger from one car to the other) since we work different schedules and it'd be easy for one of us to move it when the first car's done charging. :-) With slower charging, depending on our various commutes, it might be more of a hassle. (Again, this is just for us.)

I think it also depends on whether or not you're getting a 60kw or 85 kw battery. The larger battery car's cost is so much more money especially if you get a Perf version. Hence, the marginal cost of the $1500 is much smaller. Personally, I wouldn't spend that kind of cash on a car without the peace of mind that comes with the future proofing of a twin charger.

If your not too price-sensitive, definitely get it.

We ordered it on both of ours, and use it with our HWPC every day.

It's very satisfying to see it fill fast, and the essential benefit is flexibility. Whenever your day has unexpected turns, it gives you the power to adapt.

Although it can help at certain public charge points, right now that's a rare benefit.

98% of the time, most folks charge at home, and it does come in handy there.

I got it, but I am thinking that was a mistake.

An HPWC is completely unnecessary so far in my experience.

The only scenario in which you would need it is if you need to exceed your 180/220 miles in a single day locally.

It depends on your needs.

I live in LA area so once I arrive to San Diego, it's faster to charge with twin chargers than single charger at San Diego Tesla University Towne Center HPWC because there's no Supercharger there.

Yes I was simplifying and being US myopic. Anything 50A or smaller doesn't need the twin chargers. In the US J1772 > 30A is rare where I am (Texas) and NEMA doesn't make a plug or Tesla an adapter > 50A thus my statement that the HPWC is my only way to access > 50A. The reason I mention it is twins plus HPWC is 3k not 1.5k so the cost to use 20kw can be more. However I stand corrected. I do use the fast charge rate and as I mentioned the two scenarios where it comes to play are quick topping off and a change in plans requiring max charge last min. All non-essential with planning.

I am only going to need a single charger. I highly doubt there will be any times where I NEED to be able to regain 62 mph rather than 31.

I live very close to work, so any high mileage that I need to regain, will be from joyriding rather than necessity, so with the single charger, I will really only need to charge maybe 1-3 hours max daily, if that. So dual chargers would be overkill, and a waste of money for me.

I may even be able to get buy with 110 if I really needed to, but I would want to HAVE to.

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