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IssacZachary
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Re: Use of Portable Generator to Charge the Battery in an Emergency

Thu May 04, 2017 1:36 pm

JohnKuthe wrote:
IssacZachary wrote:
JohnKuthe wrote:
Yes, basically. It's JUST electricity, electrical energy.

John Kuthe...

I've only seen where pure sine wave inverter generators work (after the grounding issue is resolved). With construction type generators this is the only test that I know of and it didn't work:


A "pure" sine wave? How does whatever knows the difference won't work if it's NOT a "pure" sine wave? And what's the metric and allowable level of impurities from a "pure" sine wave?

John Kuthe...

I don't know. All I know is that there seems to be a lot of pessimism that it won't work, and the few tests that have been done seem to confirm this.

Maybe the Leaf's charger ramps up faster than a normal generator can and that for some reason stops the charging process immediately. I really don't know why it doesn't work.

But the day I see someone on here go get a construction grade generator and charge their Leaf off of it just fine I'd be getting one myself right away. But until then I'm keeping my eyes out for a good used pure sine wave generator.
2013 SL, 40,000 miles, 12 bars.

BrockWI
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Re: Use of Portable Generator to Charge the Battery in an Emergency

Thu May 04, 2017 2:35 pm

I believe the stock EVSE has a pretty tight range for allowable variances, just guessing here, but maybe 59 to 61 hz and 115 to 125 vac? Maybe someone has already found the range?

It amazes me that when the car starts charging it is a sudden "hit", it could so easily ramp up the draw and then most gensets wouldn't have a problem, but when you drop an inductive load of 1300 watts all at once, all but the largest gensets will bog a bit, thus dropping out of range for a split second on the EVSE.

With the stock EVSE I personally have used a Hondau EU2000i and it works fine, once charging you can switch in to "eco" mode to slow the genset a bit, but you can't be in eco mode to start. I have also used the stock EVSE with a xantrex prowatt 2000 and it works from that as well. I have tried a "well used" generic 2500w genset and the EVSE would just never start, kept going in to fault when it tried to start charging.
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IssacZachary
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Re: Use of Portable Generator to Charge the Battery in an Emergency

Tue May 09, 2017 10:40 am

BrockWI wrote:With the stock EVSE I personally have used a Hondau EU2000i and it works fine, once charging you can switch in to "eco" mode to slow the genset a bit, but you can't be in eco mode to start. I have also used the stock EVSE with a xantrex prowatt 2000 and it works from that as well. I have tried a "well used" generic 2500w genset and the EVSE would just never start, kept going in to fault when it tried to start charging.

That sounds typical. Both the Honda EU2000i and the Xantrex Prowatt are high quality true/pure sine wave inverters. Frequency, voltage and wave form won't hardly change on those (unless it's in eco mode). And the wave form is not a modified sine wave on either.

Personally I've been contemplating either getting a Honda or Yamaha sine wave inverter generator or install a stand alone sine wave inverter and then running a 12, 24 or 48V DC generator.

The latter option would allow me to expand to using solar energy to charge the Leaf some time in the future. It would also allow me to possibly build a larger +6kW generator that would be lighter for a small hitch basket (perhaps as light as 100lbs vs +200lbs for a 240V inverter generator set.) since the weight of the inverter would be placed somewhere on the Leaf itself. Also if I didn't go that powerful I could make it run off of a 12V system and then charge my Leaf off of another ICE car in an emergency.
2013 SL, 40,000 miles, 12 bars.

rmay635703
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Re: Use of Portable Generator to Charge the Battery in an Emergency

Tue May 09, 2017 3:02 pm

Cheap generators are nothing but pure sign wave
Where they fail is in unsteady HZ and startup voltage.

Cheap inverters are not pure sign wave.

LeftieBiker
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Re: Use of Portable Generator to Charge the Battery in an Emergency

Tue May 09, 2017 3:16 pm

rmay635703 wrote:Cheap generators are nothing but pure sign wave
Where they fail is in unsteady HZ and startup voltage.

Cheap inverters are not pure sign wave.


Interesting. I'm guessing that the pure sine wave is because they use rotating coil/stator setups? I've been reluctant to use electronics with my Champion (Honda) clone, but it's never caused a problem when I have.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

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IssacZachary
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Re: Use of Portable Generator to Charge the Battery in an Emergency

Tue May 09, 2017 6:03 pm

rmay635703 wrote:Cheap generators are nothing but pure sign wave
Where they fail is in unsteady HZ and startup voltage.

Cheap inverters are not pure sign wave.

True. Don't cheap/construction grade generators also have voltage spikes when loads are dropped?
2013 SL, 40,000 miles, 12 bars.

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