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 Post subject: Max amperage of on-board charger?
PostPosted: Sun Mar 18, 2018 7:05 pm 
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Joined: Tue Feb 13, 2018 12:56 pm
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I know the wattage of the on-board charger is 7.2kW which means 30A at 240V but could it pull e.g. ~35A on a 208V circuit (assuming the EVSE is rated for it)? Or would it still be limited to 30A (and therefore ~6.2kW at 208V)?


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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Sun Mar 18, 2018 8:24 pm 
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Joined: Mon Oct 05, 2015 2:01 pm
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owo wrote:
I know the wattage of the on-board charger is 7.2kW which means 30A at 240V but could it pull e.g. ~35A on a 208V circuit (assuming the EVSE is rated for it)? Or would it still be limited to 30A (and therefore ~6.2kW at 208V)?


Design is limited by current. 30 amps, max. 240V at home, will charge at 7.2 kW. 208V, if really 208 and not sagged down to 200V by long wire run, close to 6.0 Kw charge rate. You can see this by the estimated completed charge time, quite easily. Most commercial buildings and EVSE that are level 2 will be 200 to 208V and 17 -20% slower to fully recharge.

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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Sun Mar 18, 2018 9:18 pm 
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Joined: Tue Feb 13, 2018 12:56 pm
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So future-proofing aside, the e-Golf won't benefit from an EVSE rated for more than 30A? Good to know.


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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Mon Mar 19, 2018 7:57 am 
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Joined: Sat Jul 25, 2015 2:24 am
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Location: SoCal
owo wrote:
So future-proofing aside, the e-Golf won't benefit from an EVSE rated for more than 30A?


Nope.

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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Tue Mar 20, 2018 6:07 pm 
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Joined: Mon Sep 19, 2016 10:12 am
Posts: 102
I have a 40A OpenEVSE and it charged my eGolf at 30A. The car takes what it needs and it ignores the rest. The same EVSE charges my B250e at 40A. As long as there is enough current the car takes what needs. In my eGolf I had a 10A reserve that was not used.

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Mfg 5/2016 The WV was great but
the Mercedes fits my aging body better
Back to a B250E 2017 cirrus white.
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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Tue Mar 27, 2018 12:17 am 
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Joined: Fri Dec 22, 2017 4:42 pm
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Location: San Jose, CA
Remember: The charger is in the vehicle. All the EVSE does is tell the charger the maximum amount of current that can be drawn from the circuit. It's the charger's job to respect that and pull the appropriate amount of current.

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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Tue Apr 03, 2018 10:33 am 
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Joined: Mon Sep 19, 2016 10:12 am
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RonDawg wrote:
owo wrote:
So future-proofing aside, the e-Golf won't benefit from an EVSE rated for more than 30A?


Nope.


With the exception of Tesla based cars the max charge is 32A on a 40A circuit. A 30A EVSE will handle most cars just fine. A 40A car will charge at 30A just slower. J1772 cars set the internal charger to match the available current

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2016 eGolf SEL/ w drive assist. Urano gray with a black interior.
Mfg 5/2016 The WV was great but
the Mercedes fits my aging body better
Back to a B250E 2017 cirrus white.
2019 white IoniQ. It fits fine


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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Fri Jun 07, 2019 4:07 pm 
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Joined: Tue May 07, 2019 8:00 am
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Location: Southern California
I've got a 2015 SE with the 3.6kWh charger. Is there a way to upgrade that to the 7.2?

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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Fri Jun 07, 2019 4:59 pm 
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Joined: Sat Jul 25, 2015 2:24 am
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Location: SoCal
rcworship wrote:
I've got a 2015 SE with the 3.6kWh charger. Is there a way to upgrade that to the 7.2?


You likely don't have a 2015 model. All US 2015 models had the 7.2 kW charger with CCS port. SE didn't come out until the 2016 model year.

And no there is no easy way to upgrade a 3.6 kW model to a 7.2 kW model. It's easier to trade in the car for a 2016 SE+QC, and probably cheaper too.

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2015 eGolf SEL (originally leased, bought out lease)
former EV: 2012 Nissan Leaf SV (lease returned)
Range Extender: 2017 VW Golf Alltrack S 4Motion


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 Post subject: Re: Max amperage of on-board charger?
PostPosted: Sat Jun 08, 2019 3:34 am 
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Joined: Tue Mar 12, 2019 5:23 pm
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Location: VT
owo wrote:
So future-proofing aside, the e-Golf won't benefit from an EVSE rated for more than 30A? Good to know.


However the MEB for the ID will be. So if you are pulling a new 8-3 for a new circuit in the garage, plan on a 50Amp. Foresee people needing to upgrade their 100amp service to 200 or even adding a separate 100 amp service for that detached garage.

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