mj425
Posts: 1
Joined: Sat Aug 01, 2020 5:52 am

New owner long distance charging concerns

Sat Aug 01, 2020 10:33 am

i have a deposit on a 38 k millage 2017 94 ah rex iit's got all the bells and whistles so looks like we will have to pay luxory car road tax which is really annoying.

is 38k too much milage?

My other concern is the uk charging network if i'd bought a tesla I think i'd fel pretty at ease but using random public chargers I'm not sure about journeys over 200 miles there and back.

I do'n't have a drive way bur I will just so a slow charge with an extension cable and a ramp over it . Also can anyone recommend charging adapters I should get?


any advise would be really welcomed

jadnashuanh
Posts: 4997
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: New owner long distance charging concerns

Sat Aug 01, 2020 1:13 pm

From what I've read, many of the UK utility companies will subsidise installation of an EVSE, so you will want to look into that. If you're done taking a long trip, it will take many hours to recharge your batteries...better in the UK with 220vac than in the US with our 120 on the plug-in unit, though. In the USA, charging units all come with a tethered cable...that's not necessarily the case where you live, at least if you were trying a level 2 charge. I think all of the CCS units have a tethered cable, though. If you do not have a cable for level 2 charging, you may want to buy one. For the narrow back roads and commuting, I think the i3 is a great car. You should have fun with it. It's okay for longer trips, but not my ideal. I prefer to just get in, and stop when I feel like it, not be required to do it as regularly as the i3 does on a longer trip.

The CCS unit availability in the UK I've heard is pretty good. I know in the USA, there are apps that will show you where they are, and the built-in maps of the i3 will as well, but you do need to update the maps to have the latest information. There are probably apps for your phone or tablet that will show charging points. In some markets, map updates are free, but it's easy to do and you can buy a license for free updates if yours does not have it that doesn't cost much.

Keep in mind that while people do successfully take long trips with their i3 REx, that is not what the car was designed for, and you're going to be stopping about every 1-2 hours or so to either fill up the fuel tank, or charge the vehicle when on a motorway after the first bit running the battery down. The i3's batteries can charge at a maximum of 50Kw/hr on a CCS unit, but it slows down as the charge gets higher, and will also be slower when the batteries are warm and more if they're hot. To fully recharge you 94Kwhr battery will take closer to 2-hours. Some of them seem to charge for both the power used, and factor in time. While mine has that capability, I've never found the need to do a DC fast charge.

Keep in mind that if you let the batteries get depleted, when you turn on the REx, or it starts on its own, it will not try to fully recharge them, only try to maintain whatever level you had (or try to get to 6%, which is where it will automatically turn on). The REx is about a 34Hp motor...the i3's motor is 170Hp...if your batteries are low, the REx cannot keep up on the power demand, and your state of charge will drop. It's fine for maintaining about 70-mph on the level, but faster, or with a grade involved, it will be pulling more power from the batteries than the REx can replenish until you drop your load.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
Soon (hopefully!) A 2021 X5 45e will replace the above

JohnKelly
Posts: 93
Joined: Sat Oct 07, 2017 7:02 am

Re: New owner long distance charging concerns

Mon Aug 03, 2020 7:59 am

Have you got the plugshare app on your phone? If you set the filters for the plugs that work on your car, you will see what is available along routes you wish to take. Read the comments to see how reliable the stations are. With a REX you should have no worries.
2015 REX / Participating on plugshare w/level 2 Clipper Creek 32 amp, Moclips, Washington coast

richs
Posts: 45
Joined: Sat Apr 04, 2020 5:09 am

Re: New owner long distance charging concerns

Mon Aug 03, 2020 9:20 pm

jadnashuanh wrote:
Sat Aug 01, 2020 1:13 pm
The i3's batteries can charge at a maximum of 50Kw/hr on a CCS unit, but it slows down as the charge gets higher, and will also be slower when the batteries are warm and more if they're hot. To fully recharge you 94Kwhr battery will take closer to 2-hours. Some of them seem to charge for both the power used, and factor in time. While mine has that capability, I've never found the need to do a DC fast charge.
I have a 2017 REx with the 94 Ah (that's 33 kWh) battery, and it recharges far faster than 2 hours at a public DC fast charger. I recently started a trip at 100% SOC and drove 82 miles from Austin, Texas, to an Electrify America DC charger in San Antonio. The outside temperature was around 100 degrees F and I drove about 70 mph the whole way with the AC on, so the battery was definitely at least "warm" that day. I arrived with 27% SOC, plugged in, and the car almost immediately started charging at very close to 50 kW. After 30 minutes, I unplugged at 93% SOC. The charge rate didn't really ramp down much until the car was around 90% SOC, so these i3's do have very flat DC charging curves.

I'm not saying that the i3 is great for road trips, but it's more doable that most people imagine, at least with the 94 Ah and 120 Ah battery packs. And I live in Texas, where the distances are HUGE compared with Europe.

JohnKelly
Posts: 93
Joined: Sat Oct 07, 2017 7:02 am

Re: New owner long distance charging concerns

Tue Aug 04, 2020 6:37 am

I would drive anywhere at any time with my 2015 Rex. The most I have driven in one day was 515 miles and I could have gone longer.
2015 REX / Participating on plugshare w/level 2 Clipper Creek 32 amp, Moclips, Washington coast

jadnashuanh
Posts: 4997
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: New owner long distance charging concerns

Tue Aug 04, 2020 11:08 am

My bad...confusing amphr with Kwhr...still, I prefer to get in and drive until I'm ready, not being limited by the vehicle. Overall comfort is a personal thing, and while I don't have any issue running around in my i3, when I have driven to the point where I needed to recharge, I was ready for a stop...IOW, the seats are fine for me but after a bit more than an hour, I am getting uncomfortable.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
Soon (hopefully!) A 2021 X5 45e will replace the above

Return to “Buying the BMW i3”