vulcan33
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Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 4:41 am

We have a rustic cabin in Southern Ohio without power.
How big would a 240 Volt generator need to be to complete a 7 hour charge?

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LTLFTcomposite
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 5:53 am

If the charge rate is 3.3 KW, assuming you wouldn't want to push it with a sustained load beyond about 80%, I'd think you'd want a minimum of 4 KW. As a practical matter you'll find a lot of 5-6KW models on the market and that's probably where the better deals are.

If you think you're going to use it a lot you'll probably thank yourself to invest in a better quality unit like a Honda. Be sure to run the gas out and/or drain the carb if you're going to be letting it sit unused for extended periods between usages.
LTL
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gasmiser1
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 7:06 am

Price of a generator will be cheaper than an AV quote :lol:
2nd leased 2014 Nissan LEAF, 2500 miles, leased 5/4/14
(1st Leaf, 3/29/11, leased until 5/4/14, 45,000 miles)
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garygid
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 7:16 am

With the charger built into the LEAF, a "full" charging might take 8 hours or more.

However, since you would rarely start the charging truly empty, many times the charging would finish in less than 8 hours.

Assuming your generator can produce more continuous power than the LEAF can use (15, maybe 16 amps), a more powerful generator will not make the charging go any faster. However, it might be easier on the generator if it does not need to run "flat out" (at max. output) for a long time.

CAUTION: Often, a generator's "continuous" rating is substantially less than its "peak" rating.
See SOC/GID-Meter and CAN-Do Info
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smkettner
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 7:52 am

Since the LEAF charger is 3300w I would suggest a minimum of 5000va rated continuous power.
(don't look at surge rating)
Many uncorrected chargers have a power factor of ~.7 so 3300/.7 = 4714 required available power.

Correction... if the 3300 is output there will be a higher input requirement of 10 to 20%.

If someone knows that the charger is power factor corrected you might get by on 3500-4000 rating but that will not save much.
Last edited by smkettner on Thu Aug 26, 2010 7:59 am, edited 1 time in total.
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 7:56 am

Too bad you have to "bathe" the rustic cabin in smoke, smell and noise. :cry:
No way to get electric service ?
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garygid
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 8:11 am

How often, and at what time of the day, do you need to charge at the cabin?

Maybe solar panels, a few batteries, and an inveter would both power the cabin and provide a partial charge each day?
See SOC/GID-Meter and CAN-Do Info
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 8:24 am

Good points ... "how often ..." and "partial charge" (using solar).

But think carefully "how often" you'll be doing this. You might end up with a LEAF that gets 4 mpe, but also only 20 mpg :shock: It might be worth using the (cough!) gas car !

If you end up with solar ... and the utility has good rates ... when you're not at the cabin (if you can get the grid connected) you can MAKE money selling to the utility ...
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

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garygid
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 8:28 am

And, even a little electricity will increase the value of the cabin considerably, I suspect.
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, sold in 2015
2010 Prius, 2014 silver Tesla S
Nissan EVSE, mod to 240/120v 16A
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

mitch672
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Re: Generator requirement to charge the Leaf @240 in 7 hours

Thu Aug 26, 2010 8:37 am

This is a perfect use of the "Honeywell" panels that come with the Microinverters, you can add them 1 at a time, 240Watts each. of course they need AC power to "startup", but that could be done with a 12V battery and a very small inverter, just enough to get the microinverters going. As long as the load is pretty well matched, it would work fine...

http://honeywellsolarsystems.com/solar- ... tgrids.asp

http://honeywellsolarsystems.com/honeyw ... ations.asp

http://honeywellsolarsystems.com/solar- ... ules_z.asp

Edit: Never mind, probably won't work, without a way to store the power, you will only be able to charge during the day, and you may not have 7 hours of "peak" production (most places don't). A PV System with battery storage and an inverters is what you will need...
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