Level 1 vs Level 2 Charging

Discussion in 'Cooper SE' started by TripleD, Apr 30, 2021.

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  1. Recoil45

    Recoil45 Active Member

    There is no excuse for that. Speaking up face to face (calling out) goes a long way on that aspect.

    I worked in Manhattan and lived in an affluent zip code so I am familiar with the concept. Left that mess for rural country life a few years ago, .


    Sent from my iPhone using Tapatalk
     
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  3. Lainey

    Lainey Well-Known Member

    It stinks. When I remodled my kitchen I started going for quotes using the major city and not my small suburban city on the addresses. We had 2 come to our house and do 2-3x more for same brands. If I took a drawing in person we got reasonable quotes. One of the contractors asked why we went elsewhere and I told him. He was surprised to hear I think.
     
  4. polyphonic

    polyphonic Well-Known Member

    I think L1 would work fine, but IMHO go for UL Listed charging stations only if you go the L2 route. Also, at least 3 quotes for the work. It's crazy how different the pricing can be.

    Finally, if you use L1 make sure that the circuit has nothing else running on it. An electrician can help with this, and they can also help to ensure that the outlet is safe to use (e.g. the wiring to the receptacle is properly torqued. I had an issue with this a while back).
     
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  5. Chicago

    Chicago Member

    >>UL Listed charging stations only<<

    or CE, remember, the car's batteries and electronics are CE compliant, not UL compliant. I would rather have a CE charging station designed in Germany for my German designed onboard electricals, regardless of where they are actually built/assembled.
     
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  6. polyphonic

    polyphonic Well-Known Member

    Yup, just as long as it has a recognized certification for your country. Some of the Amazon knockoffs have no certifications whatsoever but will say "made to UL spec." Insurance would decline a claim if they found that was being used.
     
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  8. Puppethead

    Puppethead Well-Known Member

    With the potential (remote, but not unheard of) of a BEV battery fire burning down the garage, I was keen to have my charging completely up to code and use a certified EVSE. Saving a few hundred bucks is nothing compared to the loss if your homeowner's insurance finds an excuse not to pay out.
     
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  9. bldxyz

    bldxyz Well-Known Member

    I'll chime in and be the voice of convenience. I had my first weekend with our SE this past weekend, and I will say that I had two experiences that made me glad I have L2.

    1. Saturday, after driving down to about 60% SOC, I plugged in the car to my L2 charger since my wife was planning a big drive the next day. Well, I thought I had plugged it in, but it turns out I didn't plug it in securely enough. Discovered in the morning that it hadn't charged and got it charging just 2 hours before my wife needed to leave. It reached 100% before she left.
    2. Sunday, my wife brought the car back at 18%. My EVSE is a "smart" one so I set it to charge from 12:30am until morning. Woke up this morning to a full charge. No muss no fuss.
    During the week, I don't feel the need to plug it in every night. It's just convenient to know that you can charge fast(er) whenever you want.
     
  10. Puppethead

    Puppethead Well-Known Member

    I found getting into the habit of plugging in when I get home has been great, I never forgot. It's become automatic. And MINI encourages it.

    Or, to put it more simply: ABC – always be charging
     
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  11. TripleD

    TripleD Active Member

    Well, I could have done it myself easily, about $100 to do 6/3 wire, 40AMP CB and 14-50 outlet, but wife preferred an electrician do it. So on Thursday, it will be done for $300. At least I won't fall off the ladder!
    :)

    Thinking maybe a Grizzl-e - made in Canada but UL compliant. Appears all the cheap ones on amazon have a very similar look and are not UL compliant.
     
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  13. TripleD

    TripleD Active Member

    For any newbie researching this, I am posting following, comments I retrieved from these forums.
    And I do lose sleep over thinking this.

    Research -
    Insightman - 7400 W/240 V = 30.83 A so 32 Amps will be more than enough. I'd choose a 25-foot cord for maximum flexibility.

    Ericy - To some extent you can future proof - in 5 years you might get a different car, for example, and the cost of a 40A EVSE isn't really much more than a 32A EVSE.

    IDRW - No harm future proofing the electricals with a 50 amp. The car decides what power it needs and wont draw more than 32A.

    TOI - (recognizing there may be a gap in knowledge, so clarification may be required[​IMG] having a 50A circuit available doesn't mean it's going to force 50A upon the charger... nay nay... think of amperage as the amount of power that can be safely pulled by the device attached... voltage is the force at which it is able to be applied... so, plugging a 16A or 32A device into a 50A plug/service, is perfectly acceptable... so long as the device in question or local regulations don't require a more closely matched circuit protection level. (always over-size your wiring whenever possible, e.g. run wires expecting the worst that circuit will ever see for a constant load, and life is good)

    F14Scott -
    Because car chargers draw continuously, code requires EVSE loads to be a maximum of 80% of the circuit's breaker, e.g. a 50 Amp breaker may only use a 40 Amp connector (the "charger" is actually built into the car; the box with a cable you hang in your garage is properly called a "connector" because all it does is allow the 240V, whatever Amperage, AC electricity to flow into the car, whose internal charger then converts the juice to DC and directs it into the big battery). As others have said, just because you have a 40 amp connector doesn't mean your car can or will pull that much; it pulls what its internal charger is able to pull or, in some cars with the feature, what the user sets the draw to be.

    If your house supports it, I recommend a 60 Amp breaker, which could then supply up to 48 Amps. That is the draw of most Teslas, so it is, IMO, the de facto standard for high performance home charging. Plus, if your car's charger pulls less than 48 Amps (like the SE's, which pulls up to 32A), you've got even more headroom before wires get hot, etc.

    Assuming your house wiring can support a 60A breaker, the material cost difference between installing and wiring for a 60A circuit and, say, a 30A circuit would probably be $100.

    ingightman - I'm sure you've already read the Owner's Manual, but make sure your electrician installs at least a 40-Amp breaker if you want to use your EVSE at the 32-Amp level that will fully satisfy your SE's 7.4 kW thirst.

    GvilleGuy- I am slowly coming up to speed on what it will take to become a Mini Cooper SE owner. I am grateful to this forum for assisting my armchair research. It sounds like if I -

    A) Get a 50 amp circuit installed in my garage with a NEMA 14-50 outlet, then I can...

    B) Purchase a 40 or 50 amp level 2 pluggable wall mount charger, which, using the PLUG and not hard-wired, would provide up to 40 amps. And the Mini needs 32 amps of that capacity. (To future proof for a Tesla down the road, I would instead install a 60-amp circuit)

    C) I also need to question the electrician about whether a GFCI will be required on the circuit, which could potentially cause issues with the charging unit GFCI.

    GetOffYourGass - My JuiceBox reports the Mini pulls 30.9A when charging. The EVSE can supply up to 32A. This lines up nicely with the sticker which claims a 7.4kW on-board charger.

    At 240V / 30.9A (7.4kW), assuming an efficiency of 90% (anyone have a better number?), it takes 4h20m to charge that 28.9kWh (usable) battery from empty to full.
    At 240V / 30A (7.2kW), it takes 4h28m to charge to full.

    That's only an 8 minute difference. Only charging from 50% to full? It's only 4 minutes.

    I wouldn't think twice about a 30A EVSE for this car.


    Puppethead - I had wiring for 60 amp done, but currently have a 40 amp breaker for my Grizzl-E set to provide 32 amps which is the maximum my car takes. But I only wanted to pay once for the wiring, so I had the heavier gauge wiring used. Replacing a breaker is pretty easy when it comes time to upgrade.

    From Amazon review:

    ran a 6-3 wire through my attic, punch a hole in my main breaker box. But before snapping my 220v 50amp breaker, I connected the my ground wire to the ground bus bar, the White wire to the Neutral bus bar, then, hot wires red and black to either side of the actual breaker, snap it and ...VOILA!
     
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  14. TripleD

    TripleD Active Member

    Ok, just saw the following posted on FB:
    "If you have solar, get a charger that can be adjusted remotely so you can charge at the rate your panels are producing. Juicebox does that"

    We do have solar, so what does that mean for me to make my decision on an EVSE. I had just assumed I would be charging at night. We have net metering, so if we produce more than what we are using, we get a credit for it. So does having solar matter?
     
  15. chrunck

    chrunck Well-Known Member

    I don't think it matters. We have solar panels with no battery and net metering, too. I assume with a battery system like the Tesla powerwall, you'd want to charge at a rate that doesn't deplete your battery.
     
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  16. Chicago

    Chicago Member

    Not one bit. In fact, in many jurisdictions, manual remote adjustment violates local electrical codes. The Grizzl-e sounds perfect for your application. Once you have it in hand, please tell us if the DIP switch in the upper left portion is labeled / defined on the circuit board, or does one need the manual to set it? (Can't find a high resolution photo to see for myself.) I imagine I would lose the manual shortly after it was installed.
    G.jpg
     
    Last edited: May 3, 2021
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  17. MichaelC

    MichaelC Well-Known Member

    When you order the GRIZZLE-E, you can select which maximum current level to have the DIP switches pre-set to.

    If you want to change the setting, you must refer to the manual for a table showing the DIP switch settings, as this is not marked on the circuit board nor intuitive.

    All GRIZZLE-E manuals are available as PDF downloads, so you never have to worry about losing them: https://grizzl-e.com/manuals/
     
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  18. insightman

    insightman Well-Known Member Subscriber

    Man! I'm certain you never came to school claiming the dog ate your homework! You've been been paying close attention at the school of InsideEVs' MINI Cooper SE forum.

    However, you must have missed my story of kilowatt over-exuberance. I had a 60-Amp 240-Volt panel installed in my garage. I was limping along with just a 40-Amp Bosch EVSE for our Honda Clarity Plug-In Hybrid (which maxes out at less than 30 Amps) until I read in mid-2019 that the MINI Cooper SE I craved would be able to charge at 11 kW.

    Out with the measly 40-Amp Bosch and in with an industrial-strength 48-Amp ClipperCreek CS-60 EVSE. I was ready for my MINI! Not long afterwards I discovered the 11 kW charging was only for UK and European wallboxes that were connected to 3-phase AC power, not the single-phase AC homeowners in the US have. So I'm maxed out on the future-proofing, but my SE charges at 7.4 kW just like others with 32-Amp EVSEs.

    One benefit of my industrial-strength 48-Amp ClipperCreek CS-60 EVSE is that it has very large relay inside and when I plug in my SE, I hear an enormous and satisfying, THUNK! There is no doubt that the connection has been made.
     
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  19. GvilleGuy

    GvilleGuy Well-Known Member

    My 40-amp Chargepoint is more of a modest "click", but I still find it satisfying!
     
  20. GetOffYourGas

    GetOffYourGas Well-Known Member

    This is true. Moreover, 48A seems to be the new standard for upcoming models from other makes as well - Ford, VW, GM all seem to be going to 48A.

    However, I believe NEC limits circuits above 50A to be hard-wired only. I personally like having a 14-50 outlet that I can plug into for a couple of reasons. And it will provide up to 40A, which is close enough to 48 (83%) that I probably would never notice the difference. For a new install, a compromise would be to install wire that can handle 60A (6 AWG) and then put in a 50A breaker and a 14-50 outlet. To upgrade from there only requires a new breaker and the outlet box to be hardwired to the EVSE. This is what I did.
     
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  21. Puppethead

    Puppethead Well-Known Member

    NEC now requires all 240V outlets to be on GFCI. I ran into this because my jurisdiction uses the latest NEC, and I had to hardwire my Grizzl-E. To be honest it's so trivial to do I don't see it as a big issue. But I would like to find an EVSE that didn't have its own GFCI.
     
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  22. Carsten Haase

    Carsten Haase Well-Known Member

    Just info for anyone else, the wire gauge required by code for a EV charger is larger than for a welder. Anything defined as continuous duty can only use 80% of the rated circuit capacity so a 50A breaker and 50A rated wire (typically 6/3) is required for a 40A charger.

    Definitely likely that an EV charger install will be quoted higher but saying it's for a welder could get you the wrong gauge wire installed.
     
  23. bldxyz

    bldxyz Well-Known Member

    The physical connection does have a reasonably satisfying click to it, but what threw me off was the JuiceBox reported it was connected, despite not ultimately charging it. I did what any tech does: unplugged it and plugged it back in.
     
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