I paid ~$3700 with credit card interface, and an option to unlock with a key fob for employees and clients. I want to support them as I was pretty vocal with them to get them to produce this unit!!
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Twin Chargers: Why?
- Thread starter smorgasbord
- Start date
ModelS1079
Member
Any chance you know how to assemble a similar map for the East Coast? That amp is awesome.
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Carl - Omni Hotel, New Haven, will be my J-1772 Haven.
you can use Open Charge Map : The open, global database of electric vehicle charging locations
you can set connector, chargerate and much more
free to use in apps and websites
Open Charge Map : The open, global database of electric vehicle charging locations
ModelS1079
Member
ModelS1079
Member
This is an old thread, but the question I still a good one now that we are starting to see a major roll-out of Superchargers.
If:
a. one anticipates their Model S to be 90% local driving with overnight 14-50 charging at home
b. 10% of longer drives that would almost always take advantage of superchargers
Then:
I am not sure why Twin Chargers is worth it as an option.
Would love to hear from some folks who've ordered their Model S's in the past few weeks/months. Did you get the Twin Chargers? No?
If:
a. one anticipates their Model S to be 90% local driving with overnight 14-50 charging at home
b. 10% of longer drives that would almost always take advantage of superchargers
Then:
I am not sure why Twin Chargers is worth it as an option.
Would love to hear from some folks who've ordered their Model S's in the past few weeks/months. Did you get the Twin Chargers? No?
bollar
Disgruntled Member
I will. It's going to be years before we have great SC coverage, and in any event, they won't cover all routes. I'm hopeful that I'll see 70 amp J1772 once in awhile, and think twin chargers is a small investment to be able to take advantage of the opportunity.
Reasons for twin chargers/HPWC:
1) Limited amount of low cost time on my PG&E (7 hours) E9 EV rate. To full charge a 85 kWh battery you need more than 7 hours with 10 kW.
2) Weekends I may take a long drive in the morning and want to take another long ride in the evening.
3) There are no Superchargers anywhere nearby.
4) In California and Canada there are 70 Amp J1772 EVSE.
5) I expect Tesla to offer an even larger battery pack in future which will take even longer to charge.
1) Limited amount of low cost time on my PG&E (7 hours) E9 EV rate. To full charge a 85 kWh battery you need more than 7 hours with 10 kW.
2) Weekends I may take a long drive in the morning and want to take another long ride in the evening.
3) There are no Superchargers anywhere nearby.
4) In California and Canada there are 70 Amp J1772 EVSE.
5) I expect Tesla to offer an even larger battery pack in future which will take even longer to charge.
You do realize that's spending $1500, plus tax, to save a few pennies per kWh, right?
How many miles total that day? Are you really going to drive 200 miles, end up at home, charge for some hours, and then drive 200 miles again. When was the last time you did that?
If you're driving 200 miles from San Jose, you are, or soon will, be passing Superchargers.
As a Roadster owner who's done road trips, I know you're not going to want to sit around charging at 70 amps. Really.
It's not battery size that matters, it's how far you've driven and when you will drive again.
With over 10,000 Model S's sold, I think it's time to hear from owners about all those times they needed the twin chargers.
Right, that's my issue in a nutshell. I am debating whether to order an option that's going to add $1620 to the cost of the car (estimated CA sales tax included).
I was planning all along to order the Twin Chargers, but since I have no plans to order the HPWC, and I expect to mainly use Super Chargers when driving long distances in California, I just don't see a compelling reason to order 'em now.
mitch672
Active Member
How about $3,600 later, versus $1,500 when you order the car?
Shop Tesla Gear Twin Charger with Installation
I have the twin chargers, and built my own 75A EVSE for about 1/2 the cost of the HPWC
Not that I've needed the ability to charge at 75A often, but what I do now is use the charge timer, and charge shortly before I leave for work, minimizes the time at higher SOC. I've also reduced my SOC to 170 miles (about %70), so I'm not keeping the pack at %90 full any longer since I've had the ability to lower it with 4.5
What the twin chargers give you the ability to do quickly, is to now bring it to %90 to %100 quickly, when you need it, and maintain a lower SOC for everyday use. Yes, this "babying" of the pack probably isn't required, but I'm sure long term it will result in slower pack degradation.
This is exactly what I'm doing since 4.5.
Plus, we have some nice 70 amps chargers (SunCountry Highway) in Canada so it's quite handy to have twin chargers on the road.
The main reason is future proofing. I know several Leaf drivers who didn't purchase the faster charging port for their car because when the Leaf first came out there weren't any chargers. Now two years later, there are plenty of fast chargers and they regret not getting the fast charging port.
The future is superchargers, not 70-80 amp Level II chargers. At least anywhere you'd want to drive to from Texas.
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I challenge the notion that the time difference to go from Standard Mode Full to Range Mode Full has ANY measurable effect on pack degradation. Heck, given that the car automatically reduces the amperage as the battery gets full means you're not taking advantage of the second charger anyway
Even with your larger than default 90% to 100% charge, you're only talking a 15 minute saving IF there wasn't any amperage reduction. But, there is, so you're probably not saving anything at all.
Finally, as for keeping the pack at 70%, Tesla has specifically stated that keeping SOC below 95% does not really help battery life (see http://www.teslamotors.com/blog/bit-about-batteries), which says:
That was for Roadster, and if anything, Model S battery chemistry is even more tolerant and less affected.
Matter of fact, I'd argue that a 70% max charge actually means you're degrading your battery more! Why? Because foot stomping performance, which pulls more current out more quickly, is harder on packs when the SOC is lower.
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mitch672
Active Member
Luckily I don't "stomp my foot " often, if ever. I'm 53, not 23, I don't feel the need to do that any longer.
You manage your pack how you want, I'll manage mine how I want. Until several years have gone by, and actual pack degradation can be measured, it's all conjecture. BTW, Using the "middle" SOC range is how GM & Toyota manage the Volt & Plug in Prius, and the Volt is also a thermally managed pack
Edit: GM & Toyota are on the hook for 10 year warranties on the Volt & PiP packs, because they are considered part of the drive train, for emissions purposes. Yes, they are being conservative and trying to minimize warranty claims for pack replacement before the 10 years is up. Exactly
You manage your pack how you want, I'll manage mine how I want. Until several years have gone by, and actual pack degradation can be measured, it's all conjecture. BTW, Using the "middle" SOC range is how GM & Toyota manage the Volt & Plug in Prius, and the Volt is also a thermally managed pack
Edit: GM & Toyota are on the hook for 10 year warranties on the Volt & PiP packs, because they are considered part of the drive train, for emissions purposes. Yes, they are being conservative and trying to minimize warranty claims for pack replacement before the 10 years is up. Exactly
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mnx
2018 M3P
You're right waiting around for 70A LII charging on a roadtrip would suck. What's even worse? Waiting around for 40A LII charging. LOL
I'm trying to get a 70A j1772 installed at the local track. There will never be a super charger there, at least not in my lifetime. It would be hugely beneficial, as last time I ran out of power after circling the track for 54km. Faster charging is better.
I'm trying to get a 70A j1772 installed at the local track. There will never be a super charger there, at least not in my lifetime. It would be hugely beneficial, as last time I ran out of power after circling the track for 54km. Faster charging is better.
I bought it primarily for situations where I would likely need to fast-turn around the car. Circumstances changing and needing to leave on a longer errand on shorter notice, etc...
I've had my car for a month, and used my twin chargers once because it was convenient (the Tesla showroom at the local mall has a HPWC @ 80 amps).
I don't yet have my home HPWC running @ 80 amps, but plan to soon. Not having it already caused a little bit of a tight schedule for me on one occasion...
I've had my car for a month, and used my twin chargers once because it was convenient (the Tesla showroom at the local mall has a HPWC @ 80 amps).
I don't yet have my home HPWC running @ 80 amps, but plan to soon. Not having it already caused a little bit of a tight schedule for me on one occasion...
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