We recently bought a 2021 Kia e-nero with 56k on the clock. We haven't yet got close to the range figures given for the niro but have put that down to where we live and drive. It's hilly and almost never do long easy open roads
Yesterday I charged to 100% for the first time before a longer trip. Looking through the app I am a bit troubled by what I think the numbers are telling me. When new the niro should have 64kWh available Pictures below.
In a perfect world you'd get 125 mile range at the SOC. There will be 3 years battery wear plus air temp has a big impact. The range doesn't look too bad.
We see 3.2 miles per kWh at the moment. Also the guessometer and recent driving conditions can have a massive impact when combined at the charged end range display.
I recently charged in the city, finished and drove back to apartment. There is a steep hill which makes up half the journey. With regen on the journey we had an anticipated per kWh mileage of 999 miles. Sadly that didn't last.
15kW PV SE, VI, HM, EN
42kWh LFPO4 storage
73kWh V2H EV
7kW ASHP
200ltr HWT.
3G
Deep insulation, air leak ct'd home
WBSx2
Low energy bulbs
Veg patches & fruit
How did you charge to 100%, and are you confident it worked? It’s cold, so might be charging very slowly? If the batts were degraded, the car would state 100% charged but give shorter range.
We have an old 30kWh Nissan leaf, and have a variety of charging techniques - the most reliable way to get 100% is still with the supplied granny charger.
4kWp solar, EV
MVHR, 150mm EWI, 15kWh batt, 2.5kW GSHP, no gas, 7.5kW PV, TM3 + leaf ‘cos can’t insure kids for TM3
Charged with a Zappi at home. When we got in the car it said the battery was at 100%. Went down to 99% while we messed around getting loaded with the climate control on
Based on using 59% of SoC (100% - 41%), with that reported as 34.21 kWh, then 100% = around 58 kWh.
But that assumes the %SoC is a perfect straight line as energy is consumed. The type of batteries used in EVs have a very non-linear voltage curve, so it all depends on what method Kia use to calculate the current %SoC.
If you run it down to a lower %SoC and summate all the kWh consumptions for each journey then you are likely to get a more accurate total kWh capacity value.
Beau wrote: ↑Sat Feb 24, 2024 7:18 am
Yesterday I charged to 100% for the first time before a longer trip.
Have you been charging to 100% other times too? Maybe the cells are a bit unbalanced and it just needs leaving on the Zappi for a decent time to top balance the cells?
Beau wrote: ↑Sat Feb 24, 2024 7:18 am
Yesterday I charged to 100% for the first time before a longer trip.
Have you been charging to 100% other times too? Maybe the cells are a bit unbalanced and it just needs leaving on the Zappi for a decent time to top balance the cells?
We have only had it 5 weeks and that's the first time I have fully charged it.
So just leave it plugged in? It said it had stopped charging so presumed that was it done. I had better look in the car handbook about balancing cells
Last edited by Beau on Sat Feb 24, 2024 12:20 pm, edited 1 time in total.
Sim_C wrote: ↑Sat Feb 24, 2024 9:33 am
Based on using 59% of SoC (100% - 41%), with that reported as 34.21 kWh, then 100% = around 58 kWh.
But that assumes the %SoC is a perfect straight line as energy is consumed. The type of batteries used in EVs have a very non-linear voltage curve, so it all depends on what method Kia use to calculate the current %SoC.
If you run it down to a lower %SoC and summate all the kWh consumptions for each journey then you are likely to get a more accurate total kWh capacity value.
Ok that's an interesting hypothesis. I will try that when we have a 200mile run
Very fag-packet maths would suggest the battery has had about 9% degradation in its 3 years/60k miles of use so far. So even more fag-packet maths that averages out at 3% a year, and batteries degrade the fastest in their first couple of years of life. So even assuming 9%, I'd say you're within the realms of normal.
As mentioned in another thread, it is worth charging to 100% every now and then to give the BMS a chance to re-set what it knows of as the max cell voltage, but when you do charge to 100% make sure not to leave it stuck at full charge for extended periods of time.
Also available battery energy is lower in colder weather - electrochemistry is the science of witches and wizards - so you may well find you get more capacity in the warmer months anyway. .
Tesla Model 3 Performance
Oversees an 11kWp solar array at work
dan_b wrote: ↑Sat Feb 24, 2024 12:42 pm
Very fag-packet maths would suggest the battery has had about 9% degradation in its 3 years/60k miles of use so far. So even more fag-packet maths that averages out at 3% a year, and batteries degrade the fastest in their first couple of years of life. So even assuming 9%, I'd say you're within the realms of normal.
As mentioned in another thread, it is worth charging to 100% every now and then to give the BMS a chance to re-set what it knows of as the max cell voltage, but when you do charge to 100% make sure not to leave it stuck at full charge for extended periods of time.
Also available battery energy is lower in colder weather - electrochemistry is the science of witches and wizards - so you may well find you get more capacity in the warmer months anyway. .
And it was cold when I charged so that fits very well.
Many thanks all. It sounds like its pretty normal degradation and it covers the miles we need to do as it is.
