[RE-wrenches] Charging a Bolt with an SW
Ray
ray at solarray.com
Mon Jun 8 13:04:55 EDT 2020
Also have a customer with a Leaf that can charge from a dual GVFX
system. He uses the 120 vac charger. Lower charge rates are more
efficient both for the car's battery and the solar/ battery system, so I
recommend sticking to the 120 vac chargers if possible.
Ray Walters
Remote Solar
303 505-8760
On 6/7/20 6:04 PM, Darryl Thayer wrote:
> I was trying to charge a Nissan Leaf with a ? Iam not sure but two VFX
> i think old age.. i mostly rember having the problem. I think the
> car harger had a max of 2kw
>
> On Sun, Jun 7, 2020, 3:41 PM Jay <jay.peltz at gmail.com
> <mailto:jay.peltz at gmail.com>> wrote:
>
> I’ve got offgrid 2 clients and they have no issues.
>
> They each have a Bolt and can choose the charging rate. They can
> run it at either power. But only use higher power when they have
> lots of sun.
> Older Stacked vfx and Schneider xw, no issues.
>
> I would expect the SW to work, however it’s an odd beast as it’s
> waveform steps change with load. More load, more steps, therefor
> cleaner so maybe at lower charge rate it’s not clean enough.
>
> As to your issue it could be power factor Being really poor.
> Can you tell us what inverter, yea 5 years ago is a long time.
>
>
>
> Jay
>
> Peltz power.
>
>
>
>
>
>> On Jun 7, 2020, at 11:53 AM, Darryl Thayer <darylsolar1 at gmail.com
>> <mailto:darylsolar1 at gmail.com>> wrote:
>>
>>
>> I think you said it well, about 5 years ago I tried to charge a
>> car from an off-grid system. I did not record my events but the
>> inverter had twice the power of the level two charger, yet the
>> inverter would get hot and trip out. I was told a ferroresonant
>> transformer may help, and it might be different with different
>> cars. However, I was warned the ferroresonant was to stop input
>> wave problems from arriving at the output not to prevent the
>> output wave problems showing up on the input. The off-grid
>> customer gave up.
>>
>> On Sun, Jun 7, 2020 at 6:36 AM Hilton Dier III
>> <hiltondier at gmail.com <mailto:hiltondier at gmail.com>> wrote:
>>
>> The issue with EV chargers is that they create a lot of
>> reactive power. Think of it as "slosh" in the waveform. That
>> means that charging at 2,000 watts sloshes a lot more than
>> 2kW through the cable, plug, outlet, and from the inverter.
>> If you've got a reasonably good sinewave inverter the charger
>> will like it fine. However, the inverter might not like the
>> charger if you cut things too close. Make sure to have a lot
>> of top end left in your inverter. Always use a transformer
>> based inverter. The SW series has a big chunk of metal in it,
>> so that's good. At 120V the Bolt will only draw 1440 watts max.
>>
>> An aftermarket Bolt 240V charger can draw up to 32 amps.
>> That's 7.7 kW, so too big for an SW. Treat it more like 40
>> amps. The OEM 120/240 EVSE (smart charging cord) that comes
>> with the car can draw 8 or 12 amps at 120V or 12 at 240V.
>> Assume that the 8 amps is really 12 and the 12 is really 15
>> or a bit more. I have seen 15 amp plugs and outlets with the
>> hot prong melting plastic around it. The plug on the OEM EVSE
>> is 20A rated but make sure your outlet is as well.
>>
>> --
>> Hilton Dier III
>> Missisquoi River Hydro
>> Renewable Energy Design
>>
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