Question on granny charging

[Fluffykins]

Mines a standard range 5. Bumbling around Norfolk I'm getting up to 4.8m/kWh and a total range (miles done + GOM predicted) of 248. I normally run in Eco and KERS#3 when I remember to switch, with a/c off, ram air (no recirc), wipers and lights on auto and a boot full of 2 deckchairs, windbreak and parasol. (Just in case the weather is good enough for an impromptu tootle to the beach with a flask if tea, although that's now more and more turning out to be a trip to the beach cafe for two plates of filthy dirty fries instead)

Just plugged in for a recharge overnight at a total distance on the latest charge of 204 miles, with 45 remaining, according to Mr GOM.

 

[peter]

My LR is new just a month old but I can only balance charge up to 404v. Should I worry? It will also only show 245miles of range at 100% and accumulated trip reset. I used to have a ZS EV which had the bad bms software so a little paranoid about this.

 

[Fluffykins]

Is that in Eco mode and no heating on?

 

[smokie]

Best mine has showed at 100% was about 200 miles in Economy mode. But I'm not driving that economically really - cruised at 70 - 75 there and back round the M25 earlier to see family, overall trip mpg was 2.9.

 

[Ian MG5]

Hi
When I balance charge I get anything between 403 to 406 volts
The best range I had with nothing turned on was 258 miles but I get nothing like that as my trip to work is only 1.5 miles (3 mile round trip)
So I get around 1.5 miles per kWh but it soon jumps up to 3+ when I go for a decent drive so don’t worry too much
???????

 

[peter]

404v Reading is with 100% charge and balanced and everything turned off.
My 245miles is also the GOM reading, not actual range, which I know can change based on whether and driving etc. But the GOM I Think should always show 250 after a trip reset and 100% charge if battery is 100% SOH.
Still worried this means my 'new' battery is not 100% soh.

 

[smokie]

But the GOM I Think should always show 250 after a trip reset and 100% charge if battery is 100% SOH.

What makes you think that? I don't recall it in the book.

 

[5teep]

Forget the GoM.

As far as I'm concerned it's a placebo or at very best more guess than meter, it will tell you xx miles range and fall normally till you get below 25% and then drop like a stone. It also drops 10 to 30 miles if you turn the AC on (regardless of what the AC is set to) even though using it will not burn up anything like 30 miles of range.

You should know fairly accurately how far you can get in what weather after a short time driving the car so, calculate how far you've gone versus how much battery is used and that will give you how much further you can reasonably go.
For my own SR model measuring performance is easy enough, I multiply battery % used by two and match it to how far I've gone, if it's the same or close I'm getting about 200 miles.

 

[Gomev]

What makes you think that? I don't recall it in the book.

It's how it works on the ZS, not sure about the 5, it isn't in the ZS handbook either.

 

[Kithmo]

Interestingly, I noticed just before I put SWMBO's 5 on charge, it was at 19% and 401V, which I thought was quite high for 19% charged. My ZS starts at 456V and drops down to 390 something if I let it get down to 20% ish.

 

[Gomev]

Interestingly, I noticed just before I put SWMBO's 5 on charge, it was at 19% and 401V, which I thought was quite high for 19% charged. My ZS starts at 456V and drops down to 390 something if I let it get down to 20% ish.

That is high, mine is somewhere around 380/390 when at approx 70%. Not really made any notes but way lower than your figures and at higher SOC.

 

[biffo]

Not sure if AC and DC are comparable, but on a rapid the other day, I'm sure I saw 365V and 121.1A at around 50% - equating to 44kW charge rate on a 50kW unit. I thought the voltage increased until it hit around the 400V mark when fully charged?