EV (electric vehicle) News & Discussion

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976 posts

Ultimate Geek

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#3331857 15-Jan-2025 16:45

@kotuku4 Our 30kWh Leaf returns 6.3 - 6.6km/kWh so based on that your calcs seem pretty realistic. Worth keeping in mind that the biggest threat to Leaf SoH is DC charging so if you're planning on that being a regular practice allow for more rapid SoH decline than if you usually home charge on AC.

Can't comment on the other EVs you've mentioned.

https://www.harmlesssolutions.co.nz/

BlargHonk

149 posts

Master Geek

#3331858 15-Jan-2025 16:53

I'm also looking at getting a second hand EV for an 80km round trip to work (open roads). I am not a fan of Leafs but the 38kwh Ioniqs look like a pretty good deal at around $22k for a 2021 with less than 20,000km. Anyone have an idea of a realistic open road range on these? Over 250km or is that overly optimistic?

I know the fast charging on these isn't that fast, but we have a big petrol car for longer trips. Is there any reason to avoid the original Ioniq these days?

Jase2985

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#3331916 15-Jan-2025 19:11

BlargHonk: I'm also looking at getting a second hand EV for an 80km round trip to work (open roads). I am not a fan of Leafs but the 38kwh Ioniqs look like a pretty good deal at around $22k for a 2021 with less than 20,000km. Anyone have an idea of a realistic open road range on these? Over 250km or is that overly optimistic?

I know the fast charging on these isn't that fast, but we have a big petrol car for longer trips. Is there any reason to avoid the original Ioniq these days?

From all accounts, the ioniq will be better if you are regularly fast charging for doing long distance travels.

kotuku4:

Hi I have been interested in getting a second hand EV for a long time.

Have only ever had a brief test drive in an early Leaf, no other EV experience.

Interested in Leaf 40, Leaf 62, Atto 3, MG4, Kia Niro EV Light. Don't really want to spend too much on a car, and currently don't drive a lot of km. New battery tech and vehicles seem to be on the way this year.

My questions is about usable range. I have made a spreadsheet and looked at various vehicle options.

For example Leaf 40 (39 kWh usable battery) WLTP 270km, Rule of Thumb real world range 85% of WLTP according to some EV reviewers? So range 230km, If SOH 85% range 196km, home charge 100% to 10% in reserve so range 176km. If quick charging to 80% down to 10% (using only 70% of battery) range now only 137km?

By the same calcs a Niro EV with 460km WLTP, 100 SOH, would have full charge range 352km and quick charge 274km.

Do my calcs seem realistic or too pessimistic? Ie keeping some reserve, allowance for loading, adverse conditions/cold wet weather.

In my 2018 40kw leaf 87% SOH, with 4 people in the car and luggage, travelling Auckland to Cambridge on the Waikato expressway, 99% motorway driving, so 100 in the hundred zones and 105 in the 110 zones i got 137km on 85% charge. The higher average speed kills the range.

In contrast, my usual commute, just me in the car, is 67km round trip and, which is 25% suburban streets (50kph), 40% 80kph on the motorway and the rest 100kph on the motorway i use 32-33% battery. So just shy of 200km on 100% charge.

Stated dash guess-o-meter is usually about 235km for 100%

prob

225 posts

Master Geek

#3331921 15-Jan-2025 19:55

What new car run off deals are available out there?

Jase2985

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#3331922 15-Jan-2025 19:56

Polestar has some good deals on their MY23 models

Dingbatt

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#3331927 15-Jan-2025 20:28

“Run Out” deals tend to be when there is a new model about to arrive. So at the moment, that is something like the Tesla Model Y, which has just had the “Juniper” update come available. So they have excess inventory that they will try and sell. In the case of the MY the “launch edition” is quite a bit more expensive than the outgoing model but has about $5500 of extras included.

There are lots of “demonstrator” electric vehicles around, some even 2023 models. Most have relatively low kms on them. Some are tens of thousands of dollars cheaper than their original RRPs. Those include EVs like the Mustang Mach-E and Cupra Born.

The best discount I have been offered was on a brand new Lexus RZ450e. Essentially a 50% discount on the original RRP. (Didn’t want it).

“We’ve arranged a society based on science and technology, in which nobody understands anything about science technology. Carl Sagan 1996

kotuku4

484 posts

Ultimate Geek

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#3331928 15-Jan-2025 20:30

Thanks to for replies about range. I could buy cheap for short range majority of use, as a first EV. But would like to do some weekends away, and don't want to be just finding the nearest charger. Must be disappointing to buy a 400-500km range car and find that your range between chargers on a trip is more like 250-300.

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#3331935 15-Jan-2025 20:40

I doubt I ever got the guesstimated range out of a petrol car after filling it at the petrol station. Was never disappointed. Why would an EV be different?

People often mistake me for an adult because of my age.

Keep calm, and carry on posting.

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Dingbatt

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#3331939 15-Jan-2025 20:44

As Jase pointed out above, higher speeds have an impact on range.

On the Waikato expressway my Model 3rwd was using about 11kW to sustain a speed of 100km/h. When the speed was increased to 110km/h the power required increased to about 15kW. The sweet spot for the M3 seems to be about 80km/h.

“We’ve arranged a society based on science and technology, in which nobody understands anything about science technology. Carl Sagan 1996

driller2000

935 posts

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#3331951 15-Jan-2025 21:19

Dingbatt:

As Jase pointed out above, higher speeds have an impact on range.

On the Waikato expressway my Model 3rwd was using about 11kW to sustain a speed of 100km/h. When the speed was increased to 110km/h the power required increased to about 15kW. The sweet spot for the M3 seems to be about 80km/h.

the v2 component of the drag equation means that 80km/h vs 110 km/h is nearly double.

so yeah 80 km/h would use a lot less energy(fuel) for an ev (and ice).

k1w1k1d

1528 posts

Uber Geek

#3332752 17-Jan-2025 13:38

Slightly off topic, but interesting video from the UK

REVEALED: Why They're "FORCING" Electric Cars On Us

HarmLessSolutions

976 posts

Ultimate Geek

Subscriber

#3332759 17-Jan-2025 14:10

k1w1k1d:

Slightly off topic, but interesting video from the UK

REVEALED: Why They're "FORCING" Electric Cars On Us

Interesting in that Rory didn't see taxation of ICEs as a de facto incentive for EV makers to wear a loss on the EV price as a way to cross subsidise their ICE sales penalties. That's pretty much how NZ's CCD functioned (and the Clean Car Standard should do) but in the UK's case the government is taking a more manufacturer focused approach but gaining the same result. Legacy car makers must realise that if they stimulate EV sales by discounting they will gain advantage by being allowed to sell more ICEs without being fined because it's only going to become necessary to increasingly change their fuel mix in favour of EVs in the coming decade, not only in the UK but increasingly in other markets.

https://www.harmlesssolutions.co.nz/

Maccy

1 post

Wannabe Geek

#3337454 30-Jan-2025 16:03

Hello,
This is my first post so hopefully putting it in the right place?? I have just bought a 2022 MG ZS ev (essence) and have used the granny charger on my ordinary house power socket (10a?). I have been looking for advice on using an extension cable with the granny charger if I go somewhere where the lead won't reach. EV forums have said never use an extension lead, others anyone will do, others make sure its uncoiled, check it for getting warm and make sure it is at least 2.5mm squared core wire. So all the usual outlets Bunnnings, Mitre 10 don't go up to 2.5mm, except one at Toolshed.co.nz. This is 10metres 15amp heavy duty with 2.5mm Squared wire. $69.90. Sorry can't do a link as i'm new.

Has anyone used an extension with their granny home charger and does anyone know where to get one from if it works? Also can you put an ordinary 10a plug into a 15a plug socket or are they different sizes? As you can tell i'm not an electrician!!!

Cheers

HarmLessSolutions

976 posts

Ultimate Geek

Subscriber

#3337456 30-Jan-2025 16:10

Maccy:

Hello,
This is my first post so hopefully putting it in the right place?? I have just bought a 2022 MG ZS ev (essence) and have used the granny charger on my ordinary house power socket (10a?). I have been looking for advice on using an extension cable with the granny charger if I go somewhere where the lead won't reach. EV forums have said never use an extension lead, others anyone will do, others make sure its uncoiled, check it for getting warm and make sure it is at least 2.5mm squared core wire. So all the usual outlets Bunnnings, Mitre 10 don't go up to 2.5mm, except one at Toolshed.co.nz. This is 10metres 15amp heavy duty with 2.5mm Squared wire. $69.90. Sorry can't do a link as i'm new.

Has anyone used an extension with their granny home charger and does anyone know where to get one from if it works? Also can you put an ordinary 10a plug into a 15a plug socket or are they different sizes? As you can tell i'm not an electrician!!!

Cheers

Heavy duty extension lead recommended for sure. Potentially you'll be drawing up to 3.5kW for extended periods.

The pins on a 15A have a larger earth pin to stop them being used in a 10A socket so if away from home you'll need to have access to a 15A socket for a 15A lead. 10A plug will fit into a 15A socket.

https://www.harmlesssolutions.co.nz/

Scott3

3977 posts

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#3337517 30-Jan-2025 17:32

Maccy:

Hello,
This is my first post so hopefully putting it in the right place?? I have just bought a 2022 MG ZS ev (essence) and have used the granny charger on my ordinary house power socket (10a?). I have been looking for advice on using an extension cable with the granny charger if I go somewhere where the lead won't reach. EV forums have said never use an extension lead, others anyone will do, others make sure its uncoiled, check it for getting warm and make sure it is at least 2.5mm squared core wire. So all the usual outlets Bunnnings, Mitre 10 don't go up to 2.5mm, except one at Toolshed.co.nz. This is 10metres 15amp heavy duty with 2.5mm Squared wire. $69.90. Sorry can't do a link as i'm new.

Has anyone used an extension with their granny home charger and does anyone know where to get one from if it works? Also can you put an ordinary 10a plug into a 15a plug socket or are they different sizes? As you can tell i'm not an electrician!!!

Cheers

As per the other comment, 15A plugs have larger earth pins, to prevent them being plugged into a standard 10A outlets. Unless you are willing to have one of your domestic socket swapped out for a 15A unit (typically a fairly easy job, and 10A plugs stull fit fine), this is not an option for you.

Best practice is not to use extension cords for EV charging, as it adds an additional failure point. But i have on occasion used extension cord's.

I am not aware of 2.5mm^2 10A extension cord's (other than the 40 meter ones).

Personally if you must use an extension cord I would just go for a 1.5mm^2 unit (i.e. Extra Heavy Duty Tradesman Extension Leads).

You want to ensure it is fully uncoiled, and not covered.

I would also check that the EVSE draws a maximum of 8A. Work safe guidelines for EV chargers only allow 8A to be drawn from a standard domestic plug unless the EVSE has plug temperature monitoring. As such most domestic socket EV chargers draw 8A Max, but some (like those that come with Hyundai & Kia cars) will draw 10A with temperature monitoring in the plug that will automatically slow the charging down if the plug gets too warm). Using a extension cord on a 10A charge cord will mean a plug that lacks temperature monitoring.

How much length do you need total. is under 10m another option is to buy a longer portable charging cord.

As a Sidenote I charged my EV with a cord out the window for 2+ years. Obviously it cost a bit of money, but I got a proper wall mounted 32 Amp EVSE installed by an electrician last year. Should have done it years earlier. Much neater, Much faster & no more issue tripping a breaker when too much stuff gets plugged into the same circuit.

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