Battery status info

All Honda E related discussions
Luca88
Posts: 5
Joined: Wed May 15, 2024 9:08 am

Post by Luca88 »

Hello everyone!

Glad to be here with this beautiful Honda E family 😁

I'm about to buy my first Honda E, I've had a Smart EQ for 5 years so far and I've had a great time with it.

However, I wanted to change with the Honda E because I like the design and its technology too much.

However, I have a question for anyone who can kindly answer me:

I would have found a 2022 Honda E for sale at 18.9k euros with 20k kilometers.
Do you think I can ask the seller for some sort of test of the condition of the HV battery? Is there such a thing? Also to be done by an Official Honda dealer so as to know the condition and wear of the battery and whether it has been used/stored correctly.
The car is under warranty until 2025. Do you know if it is possible to extend the Honda Official Warranty?

Thanks so much in advance to anyone who can answer me!

Good day!

User avatar
Verone
Posts: 174
Joined: Thu Mar 24, 2022 6:52 pm

Post by Verone »

I'm sure that a dealer would be able to check the state of the battery for you, but I'm not sure what the cost would be for it in Italy.

Bear in mind that there are people who have put 60-80,000km on the e without issue, and haven't seen any problems with traction battery capacity at all yet, so I'd imagine you're safe. 20,000km is very little for these cars.

Honda do usually offer extended warranties after your initial three years are up, and given that there's been a few small teething issues with the car for some people (door handles not retracting and suchlike) then it might make sense to extend the warranty.

I bought my e brand new a year ago, and haven't had any issues with it thus far (I've done just under 10,000km), but I'll be looking to extend mine when it runs out in 2026, just for peace of mind :)
Icelandic Advance Limited Edition in Premium Crystal Red on 17" rims
Registered May 2023
Home Type 2 Charging & Free Work Type 2 Charging! Woo!
ODO - 9350km
green1
Posts: 34
Joined: Tue Mar 26, 2024 1:18 am

Post by green1 »

When I was buying my E I also enquired about this. I think it would depend on the dealer, but the first one I asked (general used car dealer) would not do anything - acted as if plugging something into the OBD port might damage the car :lol:. That said I don't think there's any harm in asking and you should ask.

After my experience I didn't ask, but I did try to select the car carefully where I felt it was fine not to ask, i.e. low mileage, but not too low as this would mean the EV might have been left to discharge and sit discharged, and looking at the trip computer miles/kWh across the full mileage of the car on the dash, and the miles/kWh obtained from a recent trip or test drives under different types of condition/driving. The car should also store its average speed through it's full mileage on the dash unless that has been cleared, mine was about 11 mph for 3000 miles, indicating normal stop/start city driving.

There are several ways to get some sort of check of the battery state of health if the dealer agrees:

1. They can use their own diagnostic readers
2. There is an app called Power Check Control on Android/iOS which together with a compatible OBD reader can read it.
3. Car Scanner app also does the same.

But the problem with all this is that you don't know what the state of health was when the car was new, it's not necessarily 100% at new. And even if you do, you don't know how the car's black box BMS generates this number, or whether it's reliable, or what it really means in practice until you start observing measurable differences in your own driven range/efficiency. Maybe the SoH was 92% new, but now after 18,000 miles it's 90%. Maybe a car that has been cycled in the most optimal way has 93% after all that mileage. Who knows.

Secondly, I also don't think the SoH would tell you much about how the car was charged, how often it was fully discharged, or whether it was rapid charged all the time (more wear on the battery, and more likely with higher mileage but not quantifiable) or slow charged, and I don't think the car keeps a history of this, at least not in any way that is accessible to the user.

I suppose my point is that you're probably better off not worrying too much about this, and if you are worried, then choose a car with low-decent mileage, I think 18,000 is in that range but maybe under 10,000 would be better so it doesn't bother you. That's what I did, that said I also believe the batteries in modern EVs are really robust, and it should take really abnormal usage over long periods of time to have any detectable impact on their ability to retain a charge, conditions that you're unlikely to see on a small range/slow charge predominantly city car like the E.

Lastly, make sure the car has full service history, it sound stupid but in the 0.00001% chance the car becomes a brick it's not clear to me whether Honda will honour the separate 8 year warranty on the HV battery if it does not.
User avatar
EEEE
Posts: 569
Joined: Mon Aug 16, 2021 10:33 am

Post by EEEE »

I don't think we have seen a single reported HV battery issue on the forum yet. It seems to be the most commonly asked about however.

In my mind, you are far more likely to experience faults in other parts of the car, which are not covered under some warranties. (12v battery, door handles etc).

I think if you are the type of person to worry about issues with a car, maybe the 'e' is not for you - in my view it is somewhat 'fragile'.
'21 e Advance - Charge Yellow - E1702RR alloys
'17 Civic Sport CVT
'00 Prelude 2.2VTi
green1
Posts: 34
Joined: Tue Mar 26, 2024 1:18 am

Post by green1 »

I think EEEE just summed up in a much small number of words what I tried to say :lol:, although the general anxiety about the state/health/longevity of the battery is perhaps a bit more understandable for the E than perhaps any other modern EV.
happyV
Posts: 35
Joined: Fri Aug 14, 2020 10:07 am

Post by happyV »

Those apps only report what the BMS says. And if the inspection was just done, the SoH is resetted to something around 90%.
I saw that myself on my e and I talked to the technician that confirmed my observation.
The e needs to drive - in my case - around 5000km after n inspection before the SoH reported by the BMS over OBD2 is somewhat reliable.
User avatar
FDAD
Posts: 512
Joined: Mon Aug 10, 2020 1:55 pm
Location: Porto, Portugal

Post by FDAD »

happyV wrote: ↑Wed May 15, 2024 10:07 pm Those apps only report what the BMS says. And if the inspection was just done, the SoH is resetted to something around 90%.
I saw that myself on my e and I talked to the technician that confirmed my observation.
The e needs to drive - in my case - around 5000km after n inspection before the SoH reported by the BMS over OBD2 is somewhat reliable.
What do you mean by inspection?
Honda E advance [Modern Steel Metallic] 8-) [DELIVERED JULY 2020] - 85 000Kms + βœŒοΈπŸŽ‚
happyV
Posts: 35
Joined: Fri Aug 14, 2020 10:07 am

Post by happyV »

User avatar
EEEE
Posts: 569
Joined: Mon Aug 16, 2021 10:33 am

Post by EEEE »

My e is going for a Honda Dealer service (part of the 5 years free) tomorrow, I will try and grab the SOH from the ODB2 port before and after.

In the UK, an MOT test (yearly check for safety of vehicle), they would not plug anything into ODB port at all.

I would say that it doesn't make much sense. If the SOH is variable (less important) or can be reset (important), then that surely defeats the point of a SOH variable you can interrogate the car for? I doubt that Honda dealer service resets this unless it is called for specifically by some service (HV battery replace/repair/changes).

Of all the things in the 'e' that worries me, the HV battery isn't one of them. The car is too small to be used for mega miles , so it does not use the full battery capacity regularly at all (for me), and is rarely discharged or stay at 100% for long times either. Even if the available range dropped a chunk (10-20%) it wouldn't really make much difference to me at all, because all the heavy lifting car jobs are left to other vehicles.
'21 e Advance - Charge Yellow - E1702RR alloys
'17 Civic Sport CVT
'00 Prelude 2.2VTi
User avatar
FDAD
Posts: 512
Joined: Mon Aug 10, 2020 1:55 pm
Location: Porto, Portugal

Post by FDAD »

I don't know what kind inspections you're doing but my SOH never reset back to 90% SOH :lol:
Honda E advance [Modern Steel Metallic] 8-) [DELIVERED JULY 2020] - 85 000Kms + βœŒοΈπŸŽ‚
Post Reply

  • You may also be interested in...
    Replies
    Views
    Last post