nerys
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Re: charging on generator

Wed Oct 29, 2014 9:32 am

Actually 315 amps. 220v 20 amps to 12v is 315amps.

Generator is pointless at l1. Just find an outlet.

I have no idea what the native output of the genny is. Which is why i asked about the possibility.

The battery would "buffer" the load down as the charger kicked in.
2012 SV 4802miles. 1month 2400 miles. 9 weeks 5000 miles. 6 months 13,300 miles. 4/18 15,000 miles.

dsinned
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Re: charging on generator

Wed Oct 29, 2014 11:45 am

The battery charger "output" on my generator is rated for 12Vdc @ 10A and I believe it is circuit breaker protected accordingly. Thus, at most this output could power an DC to AC inverter rated for about 100 watts.

nerys
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Re: charging on generator

Wed Oct 29, 2014 1:09 pm

Interesting. I wonder what teh native output of the gennies are?

are there simpy multiple inverters? or is there ONLY the 110v/220v inverter and they added a 12v option to it?

for some reason (no idea why) I had just assumed gennies were 12v machines and the inverter upconverted the 12v to 110v or 220v.

honestly no idea why I thought that but there is it.

is there an affordable 12v 300+ amp option? maybe would be cheaper to buy a higher quality inverter to replace the one on the genny?

or would it be cheaper to simply buy a better genny?

I wonder if EVSE upgrades can program one of these to "ramp up"

will the car tolerate that? ie can the car say start at 1amp and slowly ramp up 2 3 4 5 all the way to its normal 20amps?

if must it negotiate directly to the desired or offered amperage?

I know you can program the upgrades evse's to do other amperages so wondering if they can "ramp it up" from 1amp to 20amp to give the genny time to adjust as the demand increases.
2012 SV 4802miles. 1month 2400 miles. 9 weeks 5000 miles. 6 months 13,300 miles. 4/18 15,000 miles.

GlennD
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Re: charging on generator

Wed Oct 29, 2014 1:34 pm

I have a Champion 120V 2000W inverter unit that works fine with the stock Nissan L1 unit at 12A and 120V. I did need ingineer's resistor mod.

My Chinese 3500W 240 generator was a complete waste of money for EVSE use.

Every generator that I have seen just provides limited 12V for charging a battery.
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fooljoe
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Re: charging on generator

Wed Oct 29, 2014 1:54 pm

I suppose you could get a high-power 12V battery charger to take the full AC power off the generator, pass it through a 12V battery (or bank of batteries, as an individual battery would probably not be able to handle all that current), then pass it through a high-power inverter to convert to "clean" AC power. People with off-grid solar probably have much of these systems in place.

But with all those high-power electronics you'd probably be much better off just getting a quality inverter generator in the first place. Plus if the Leaf and other EV chargers balk at the generator's output and won't start the charge, it's possible the 12V charger (which is essentially the same thing) will do the same.
RavCharge.com | 2012 Rav4-EV | 2011 Leaf SL w/QC batt replaced 11/20/15 | Clipper Creek CS-60 | EVSEupgraded 2013 Leaf EVSE | 3.84kw PV

nerys
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Re: charging on generator

Wed Oct 29, 2014 6:34 pm

Well a car battery can push 1000 cca for quite a few seconds. Long enough for the genny to kick in and stabilize before the battery cries uncle :-)

But if inverters like that are not common or cheap then its a non starter.
2012 SV 4802miles. 1month 2400 miles. 9 weeks 5000 miles. 6 months 13,300 miles. 4/18 15,000 miles.

camasleaf
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Re: charging on generator

Wed Oct 29, 2014 7:32 pm

Could one build a "soft start" EVSE? It would start at 2A(min?) and ramp up to 12 (16)A, by it self or manually. Is the Leaf going to get "stuck" at 2A, even if the pilot signal is increased?
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pchilds
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Re: charging on generator

Wed Oct 29, 2014 8:08 pm

camasleaf wrote:Could one build a "soft start" EVSE? It would start at 2A(min?) and ramp up to 12 (16)A, by it self or manually. Is the Leaf going to get "stuck" at 2A, even if the pilot signal is increased?

6 amps is the minimum that the J1772 specification supports. If the pilot changes the LEAF will follow.
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nerys
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Re: charging on generator

Wed Oct 29, 2014 8:46 pm

Ahh so maybe a mod to start at 6 amps and in 1 amp increments ramp up to 20amps or some other user settable amperage based on what the genny will tolerate?

I wonder if they can do that? Say spend 2 seconds at each amperage from 6 to max. Or however much time the genny needs.?
2012 SV 4802miles. 1month 2400 miles. 9 weeks 5000 miles. 6 months 13,300 miles. 4/18 15,000 miles.

fooljoe
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Re: charging on generator

Wed Oct 29, 2014 10:03 pm

I know that dsinned tried setting his JuiceBox all the way down to 6A to start the charge, but it still wasn't happening at 240V. Strangely enough, he reported that using the same generator at 12A and 120V (which in theory is the exact same amount of power as 6A and 240V) did work.
RavCharge.com | 2012 Rav4-EV | 2011 Leaf SL w/QC batt replaced 11/20/15 | Clipper Creek CS-60 | EVSEupgraded 2013 Leaf EVSE | 3.84kw PV

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