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First Tesla v4 Superchargers in UK

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Discussion starter · #662 ·
tom66 said:
The only issue you may encounter is they are 400V max, so your car may need to use the boost converter. IIRC on the EV6/Ioniq5 platform this is limited to 100kW.
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They do actually have a 1000V capable, actual V4 cabinet now, but I'm not sure they've actually installed any yet. Elon has been quite busy of late 😂
 
#663 ·
simcity said:
They do actually have a 1000V capable, actual V4 cabinet now, but I'm not sure they've actually installed any yet. Elon has been quite busy of late 😂
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I imagine that Tesla will only start installing them when they build 800V/1000V cars. Cybertruck doesn't count because (a) no sane European would buy it, and (b) it's not going to be legal in Europe anyway without significant modifications. I expect 800V/1000V won't even come soon in the USA given the apparent flop that CT has been so far, and Model Y Juniper didn't use an 800V architecture, so ... not sure what Tesla's plans are there but all seems a bit up in the air right now.
 
#664 ·
tom66 said:
I imagine that Tesla will only start installing them when they build 800V/1000V cars. Cybertruck doesn't count because (a) no sane European would buy it, and (b) it's not going to be legal in Europe anyway without significant modifications. I expect 800V/1000V won't even come soon in the USA given the apparent flop that CT has been so far, and Model Y Juniper didn't use an 800V architecture, so ... not sure what Tesla's plans are there but all seems a bit up in the air right now.
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Do some other cars have relays within the battery to rewire it for 800v charging, before switching to 400v for use as a traction battery again?
If that's so, I wonder whether Tesla might be considering a mid life refresh for their packs to add such a feature, permitting 800v upgrades to their chargers?

Jeez. Typing that out made me realise just how much work it'd be. Perhaps it's in the pipeline for the robotaxi; every second it's charging it isn't earning..
 
Discussion starter · #665 · (Edited)
blueacid said:
Do some other cars have relays within the battery to rewire it for 800v charging, before switching to 400v for use as a traction battery again?
If that's so, I wonder whether Tesla might be considering a mid life refresh for their packs to add such a feature, permitting 800v upgrades to their chargers?

Jeez. Typing that out made me realise just how much work it'd be. Perhaps it's in the pipeline for the robotaxi; every second it's charging it isn't earning..
Click to expand...
New Porsche Macan (and Audi Q6 e-tron) does something along these lines.

From Porsche blurb...
"Bank charging comes into play if the selected station operates with 400-volt technology, with an intelligent software effectively splitting the 800-volt battery into two batteries with the same voltage thanks to built-in high-voltage separators. Both batteries can then be charged at the same time with up to 135 kW at a 400-volt charging station without additional HV booster, making the Macan compatible with charging stations around the world and supporting that it can be used as efficiently as possible by customers."

Image



The Taycan still uses an (optional) 150 kW buck boost converter for 400V charging.
 
#666 ·
blueacid said:
Do some other cars have relays within the battery to rewire it for 800v charging, before switching to 400v for use as a traction battery again?
If that's so, I wonder whether Tesla might be considering a mid life refresh for their packs to add such a feature, permitting 800v upgrades to their chargers?

Jeez. Typing that out made me realise just how much work it'd be. Perhaps it's in the pipeline for the robotaxi; every second it's charging it isn't earning..
Click to expand...
Along with the Audi mentioned by simcity, this is also used by GM on the Silverado EV pickup truck & Hummer EV, and the Tesla Cybertruck appears to be doing something similar. Incidentally, the GM vehicles are 400V normally, and switch to 800V for charging only, as it doesn't need the high drivetrain power than an 800V architecture would provide, but they do benefit from higher currents over CCS2.
 
#668 · (Edited)
Tight Git said:
Big change to the timings that are cheap rate on Tesla superchargers - varies a lot but expensive rates are now a lot longer eg 9am to 9pm.
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Some of this will have to do with demand, but my guess is a fair amount has to do with DNO charges, which will jump substantially for a lot of sites.

Edit: As a point of reference the Trafford Centre site if it we LV connected would be paying and addition 4.35p/kWh to ENW during the red period, 0.68p/kWh in the amber. The two periods cover 09:00-20:30 M-F and 16-19 S&S (red being 16:00-19:00 M-F). Plus an additional 4.15p/kVA/day just to exist. My guess is that the TC site is an HV site, for which the extra /kWh is only 0.929p/kWh in red, and 0.069/kWh in amber. However the capacity charge has gone up 6.16p/kVA/day. Given it is a a multi-MVA site (lets us 3MVA as a reference) the daily price just to be connected to the grid is ~£390/day for HV up from ~£337.
 
Discussion starter · #669 ·
Pmholling said:
Given it is a a multi-MVA site (lets us 3MVA as a reference) the daily price just to be connected to the grid is ~£390/day for HV up from ~£337.
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…and they're expanding it to a total of 65 x 250kW capable units. So it will be a very juicy grid connection if not already.
 
#670 ·
Tight Git said:
Big change to the timings that are cheap rate on Tesla superchargers - varies a lot but expensive rates are now a lot longer eg 9am to 9pm.
Click to expand...
Looking at the ones local to me - the peak price for the all day peak ones is about 56p and 48p overnight, vs 53/68 for the ones still with a 4-8 peak. So more like the super-peak price has come down to under 60p.
 
#671 ·
simcity said:
…and they're expanding it to a total of 65 x 250kW capable units. So it will be a very juicy grid connection if not already.
Click to expand...
The whole of the TC has a ton of 300 mm2 11kV lines running around. The current chargers are served by two 11kV links, via to 11Kv/415V transformers. The current cables have a capacity of ~4.3MVA and are only about 30% utilised. In fact the whole site is 'green' in ENWL's parlance. The whole site is fed by a nearby substation that does 132kV/33kV and then 33kV to 11kV. The three 132/33 transformers are each nominal 30MVA rated, variable to 60MVA. The two 33/11 transformers that then feed the Trafford centre links are 19MVA/38MVA nominal/variable rated. So lots of power to go around.
 
#672 ·
The ones I look at regularly have had the really cheap rate drop. e.g. locally the 12am to 4am is now 22p down from 26p. Some of the sites that were just 2 prices also look to of got the 12am to 4am price band now, not that after 12 is apealing whereas after 11pm I have aimed to use before. Overall I guess I will come out worse as I fairly often used the late morning to lunch time spot which is now peak. It will probably make me end up using real peak 4-8pm type times more though as there is not the differentual price any more.
 
Discussion starter · #673 ·
Pmholling said:
The whole of the TC has a ton of 300 mm2 11kV lines running around. The current chargers are served by two 11kV links, via to 11Kv/415V transformers. The current cables have a capacity of ~4.3MVA and are only about 30% utilised. In fact the whole site is 'green' in ENWL's parlance. The whole site is fed by a nearby substation that does 132kV/33kV and then 33kV to 11kV. The three 132/33 transformers are each nominal 30MVA rated, variable to 60MVA. The two 33/11 transformers that then feed the Trafford centre links are 19MVA/38MVA nominal/variable rated. So lots of power to go around.
Click to expand...
Yeah. That’s pretty juicy alright. Doubtless why they were quite happy to expand to ultimately be the largest ultra fast charging hub in the UK
 
#674 ·
Cant say i've seen much difference at the ones I use maybe 2p increase. Still way cheaper than any other network esp with membership pricing, just charged before 4pm at York 36p/kWh
 
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