EV general discussion

john_smith said:
I'm a Leaf with a Zappi. I have noticed they have been changing my charge % in their app based on historical usage.
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that is terrible. 1)we have multiple cars one with 1/3 the battery of the other so it really depends.
but 2) just because most of the time I only want 30%, if I am going on a road trip and manually assign a charge to get to 100% I don't expect octopus to over rule me. yes anything outside of my 6 hrs is pot luck but other than that octopus should not be messing with what I ask for.
also I don't take the .... either. if octopus wants the stop those who do, who constantly ask for a schedule for way more than they need, or who limit their car to trickle charge for more time.
.. over ride their schedules not people who use it in good faith. ( unless that is what they are doing)
 
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john_smith said:
I'm a Leaf with a Zappi. I have noticed they have been changing my charge % in their app based on historical usage.
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Thanks for that, I'll go and tell the neighbour.
We never let ours go below 60% and charge on average every two days.
Obviously it gets plugged in around 7pm and Mrs Sexy then looks at the schedule to get cheap electric to do the washing.
 
The types of chemistry used in EV batteries in theory doesn't suffer memory effects, in practise I've encountered it before, mostly older phone batteries. Though I suspect the issue is more a calibration issue with the charging module than the battery itself as such.

These types of batteries don't like sitting at too low a state or being held at 100% for long periods of time (float), intelligent charging modules should prevent that as much as possible though.
 
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Rroff said:
The types of chemistry used in EV batteries in theory doesn't suffer memory effects, in practise I've encountered it before, mostly older phone batteries. Though I suspect the issue is more a calibration issue with the charging module than the battery itself as such.
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It’s about the BMS and multiple cells. A phone is a single cell
 
john_smith said:
I'm a Leaf with a Zappi. I have noticed they have been changing my charge % in their app based on historical usage.
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This is not how I've understood nor witnessed Zappi and IOgo work. I can't find anything to support this, are you sure it's not a configuration issue? Or am I blind?
 
Mr Jack said:
I thought it was important to let the battery run most of the way down from time to time? Or is that outdated information?
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People overthink these things. Just keep it with plenty of charge. This time of year you also lose power below eg 30%.

100% is fine if you drive the car within half a day
 
Simon said:
It’s about the BMS and multiple cells. A phone is a single cell
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I'm trying to generalise, there is 3 separate factors in terms of chemistry memory effect, capacity calibration and cell balancing. Most of the time it should all be handled by the charging system but I have seen instances where it isn't as straight forward.
 
You should charge to %100 a few times a year with A/C as it balances the cells and equals out cell degradation. Charging to %100 is perfectly fine as long as you use it within 24hrs. Leaving it sat at %100 for long periods is bad as the BMS cannot perform cell maintenance as there is nowhere to move the charge around. Fast charging to %100 with DC fast charging too often will increase battery degradation best to stick to %80 when DC fast charging.
 
Oh, interesting about the MY26 Polestar 3.

It might have an 800v architecture now, but it's reduced the maximum charging on 400v chargers (most of the UK) from 250kW to 120kW!

Only 800v chargers can give the 350kW speed.
 
mercedes on 800v cla architecture, havent yet said what cost/charge rate of a 400V adapter will be, if the packs are 800V (versus more flexible/expensive 400v packs in series?)
can you charge those 800v packs efficiently at 400V, without using an inefficient invertor.
 
Yaayuh! said:
This is not how I've understood nor witnessed Zappi and IOgo work. I can't find anything to support this, are you sure it's not a configuration issue? Or am I blind?
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Its a recent change to the app and control, I've had it on my Hypervolt where as we have 2 cars and its setup for the one with the bigger battery, they are seeing errors at their end and adjusting the charge % to add as the smaller battery can't take the charge the bigger one can so is reporting back errors. They reduced my add 65% to add 45% a couple of times over the last week or so, just need to remember to check when wanting my P4 to go to 100%.

Just to say they don't change the % that you set if you adjusted it, its just adjusted based on historical data, if your going on a longer trip just make sure the Octopus app has the right % to add set and thats what it'll do.
 
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jpaul said:
mercedes on 800v cla architecture, havent yet said what cost/charge rate of a 400V adapter will be, if the packs are 800V (versus more flexible/expensive 400v packs in series?)
can you charge those 800v packs efficiently at 400V, without using an inefficient invertor.
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Apparently the Nav system only shows compatible chargers, so there is that. I know when I sat in one and did my usual routing test from London to Kilmarnock to Inverness it only showed me 4 chargers(not locations) on the entire route, yes it has a long range but that's not much contingency for broken, busy or blocked chargers any one of which could really ruin your day. At least with other cars you can go where you like.
 
Yaayuh! said:
This is not how I've understood nor witnessed Zappi and IOgo work. I can't find anything to support this, are you sure it's not a configuration issue? Or am I blind?
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Dunno.

YMMV but mine is changing. Historically it's been set at 80% and i've never changed it. The other day I was looking in the app and noticed the % was lower. Speaking to two other Zappi / IOG friends and they have noticed the same.

It's on 100% now and hasnt changed for a few days. If it does i'll let you know.
 
An adaptor for 400V charging sounds like a real sticking plaster, its a major mistake that they didn't include it in the charging circuitry. Who the hell gets out and determines whether a particular charger is 400V or 800V technology.

I think the new GLC EQ is going to be the one for me.
 
I tend to stick between 30-80% most of the time. The occasional 100% for a longer journey and into the 20s when I forget to charge it again. It’s a lease though that I won’t keep, so I’m not overly bothered. I only use about 10-12% a day, a 90% charge is a reasonable compromise for the winter I guess.

I always wonder why on my car the charging socket points upwards slightly and how well sealed it is I.e. when charging and it’s chucking it down with rain.
 
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tangey said:
An adaptor for 400V charging sounds like a real sticking plaster, its a major mistake that they didn't include it in the charging circuitry. Who the hell gets out and determines whether a particular charger is 400V or 800V technology.

I think the new GLC EQ is going to be the one for me.
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If the adapter plugs into the charge port and connects to the charger, guaranteed people will forget they are there and drive off without them
 
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tangey said:
An adaptor for 400V charging sounds like a real sticking plaster, its a major mistake that they didn't include it in the charging circuitry. Who the hell gets out and determines whether a particular charger is 400V or 800V technology.
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it's something inbuilt into the car, but nonetheless a delta cost ... but if the 400v charge rate is diminished maybe not worth it.
 
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