Chevy Bolt EV Forum banner
  • Hey Guest, welcome to ChevyBolt.org. We encourage you to register to engage in conversations about your Bolt.

Charging cable with 50' cord? + charging %

762 Views 13 Replies 12 Participants Last post by  martinknutson
Hi there! Brand new owner of my Bolt EUV (picked up this weekend 馃コ) and sorting through charger installation details. I live in a townhouse without a driveway, but with an essentially private back alley, so my vision for the charging station is to come out of my basement back wall and through the backyard to the alley. I spoke with the electrical folks that Qmerit put me in touch with-- sounds like they're going to stick the charger directly on the back wall of the basement and then I need a long charging cord. I asked where I could get that and they suggested calling the dealership... called the dealership and they said no one had ever asked them that and to just see what I could find online. Wondering if anyone here has dealt with a similar situation? I think I would need about 50' for the cord.

I suppose the silver lining is that this approach to the installation means that it counts as a standard install, so no added cost for me there... just hoping I can sort out what charger to buy. The dealership couldn't even recommend a brand to look at.

And while I'm here posting 馃槀 I am totally lost about how high I'm supposed to charge the battery (80% where do I set that setting?), but also how low do I allow the battery to run before charging? Today I was picking a book up at the library and they have a free level 3 charger, but I'm still at like 210 miles left in my charge... wasn't sure if it's bad to charge before you get really low?

SO GRATEFUL THIS FORUM EXISTS!
1 - 14 of 14 Posts
Apparently they make them. Google Primecom EVSE. Cost was higher, but not ridiculous. The cord is gonna be heavy.馃槄
Gosh, try to get them to put a weatherproof outlet box outside. You can get a charger extension cord but it has huge connectors on both ends, costs about $300. So to use it you鈥檇 need a huge hole in your basement wall to pass it through, plus 240v wires in both the basement and exterior.
Congratulations!!

And while I'm here posting 馃槀 I am totally lost about how high I'm supposed to charge the battery (80% where do I set that setting?), but also how low do I allow the battery to run before charging? Today I was picking a book up at the library and they have a free level 3 charger, but I'm still at like 210 miles left in my charge... wasn't sure if it's bad to charge before you get really low?
It's best to keep it between 20-80%, but charging to 100% at the start of a big road trip won't hurt anything. Disregard the numbers on the GOM when charging at home. It's just guessing and will fluctuate wildly depending on weather, driving style, etc.

There are some on this forum who always charge to 100% regardless of what the people who actually research this stuff say. Here's some reading material.
Do I Need to Charge My Car to 100%?

It's also better to keep the car plugged in so it can use shore power to maintain the battery temperature and keep the 12V charged up better. The common saying is "ABC, always be charging."

Set the charge limit on the charging screen. Each big line on the scale is 10%. Spend some quality time with the owner's manual. You'll be a much happier owner.
Font Material property Parallel Number Rectangle
See less See more
  • Helpful
Reactions: 1
They do make J1772 extension cords. They have a female J1772 input socket on one end and a regular male J1772 handle plug on the other. I have a 25' one that has come in handy a few times with my portable L2 EVSE (always seems to be just a couple feet shy just when I need it most). It's not generally recommended to use ANY extension with an EVSE, but people do it all the time with generally acceptable results. It helps if you keep the amperage low - 24 amps or even 16 amps. My extension is purportedly rated for up to 40 amps (the tag says so, so it MUST be true, right?) but my L2 EVSE is only 16 amps so I feel comfortable with the combo. And it has worked perfectly every time I've needed it with no overheating or other signs of trouble. I think 50' may be pushing it too far though, and I'd be VERY leery of pushing high amperage that far (say for example a 32 amp L2 EVSE). Proceed at your own risk.

The general consensus is to keep the battery between 20% and 80% for general daily use. Fully charge when going on a long trip where you need full range. So, run the battery down to about 20% and then charge it up to 80% using Target Charge setting as detailed above. Nota Bene: the battery thermal management won't run at a State of Charge (SOC) below 40%. If you live in a climate where the battery may get overly hot (above about 80-85 F ambient) then you'll probably want to keep your SOC above 40% so that the battery can cool itself as needed. I typically go down to about 50% and then charge up to 90%, but that's MY particular choice based on my climate (hot) and mileage needs (sudden surprise trips requiring at least 50% of my available battery capacity). Your situation may vary so you may do something different. A lot of folks just charge up to 80% as a daily routine and they do just fine.
See less See more
  • Like
Reactions: 1
Unsafe to use extension cords. Doubt you can get J-1722 extension to work beyond a single 25 foot.
Must be some way to get power closer in a code approved way.
  • Like
Reactions: 1
I purchased a 25 foot, UL approved, 50 amp NEMA 14-50 extension cord from Amazon which works great. I believe it is also available as a 50 foot long version.

It permits me to charge my EUV when it's parked at the far end of my driveway with the 50 amp garage outlet located on the far wall of the garage. The extension cord is quite heavy because it uses a 7/8 inch diameter flexible cable with four 6 AWG copper wires inside! I use it in conjunction with a Clipper Creek portable EVSE (Amazing-Fast) which I highly recommend. Operating at 32 amps continuously the extension cord and its terminations do not exhibit a perceptible temperature rise after charging the car for over 4 hours.

These things are not inexpensive, however ...
  • Like
Reactions: 2
No company wants to take responsibility for you using the wrong extension cord. Look in the manual for your toaster: don't use an extension cord. Your TV: don't use an extension cord. Your car charger: don't use an extension cord.

Your electricity comes through miles of wiring to your street. Then it goes through dozens of feet of wire to your house. Then it goes through anything up to hundreds of feet of wiring to your outlet. Yes you can add 25 to 50 feet or more of extension cord so long as it is good quality and properly rated. I have a NEMA 14-50 (the outlet that QMerit is going to install for you) extension cord that is about as thick as a baby's arm. I have no problem using that... or in fact something that is easier to handle. Many RVs use the same plug and come with a 50 foot cord and it is not uncommon to get a 50-100 foot extension to be able to reach the power post at a campground. These extensions have the same gauge of wire inside as the wiring from your breaker box to the outlet.
See less See more
  • Like
Reactions: 4
Call an independent electrician and request a quote for an outdoor installation to your rear fence.
  • Like
Reactions: 1
No company wants to take responsibility for you using the wrong extension cord. Look in the manual for your toaster: don't use an extension cord. Your TV: don't use an extension cord. Your car charger: don't use an extension cord.

Your electricity comes through miles of wiring to your street. Then it goes through dozens of feet of wire to your house. Then it goes through anything up to hundreds of feet of wiring to your outlet. Yes you can add 25 to 50 feet or more of extension cord so long as it is good quality and properly rated. I have a NEMA 14-50 (the outlet that QMerit is going to install for you) extension cord that is about as thick as a baby's arm. I have no problem using that... or in fact something that is easier to handle. Many RVs use the same plug and come with a 50 foot cord and it is not uncommon to get a 50-100 foot extension to be able to reach the power post at a campground. These extensions have the same gauge of wire inside as the wiring from your breaker box to the outlet.
Perhaps there too many lawyers?
I'd ask for a 6-20 outlet outside. Then use a 50' 6-20 UL extension, and a 6-20 UL EVSE like AmazingE.
Kinda depends on how much power you need there. A low current 240VAC point for an adjustable evse can still provide a lot of power. 16A on 240VAC is way better than any 120VAC choice. It can rely on smaller wires and smaller conduit. Usually easier to get it under a permit. Still an underground run could be an issue if you can't get deep easily. Some allow overhead.
I'd ask for a 6-20 outlet outside. Then use a 50' 6-20 UL extension, and a 6-20 UL EVSE like AmazingE.
I've been using the Conntek SB1430PR-025 NEMA 14-30P Heavy Duty Extension Cord from Amazon with the Amazing-E for four years now. It's a great combination, however, I have it on a 25 ft extension not 50 ft.
Unsafe to use extension cords. Doubt you can get J-1722 extension to work beyond a single 25 foot.
Must be some way to get power closer in a code approved way.
Lectron makes a 40' model.


I used a 20' when I was charging outside (for a total of 45'), and it worked fine. No discernible heating of cable or connectors.
1 - 14 of 14 Posts
Top