Even though an inverter off the Leaf pack would be the ideal way for
it is likely also a very costly way for a one-time event, unless you are
buying it to be
prepared with your own home's power backup.
I own SURT UPS that accept 2x 192V batteries to create an output that
needs to go through a transformer to give 2x 120V as most USA systems
so I plan on using a Leaf battery that I have sitting around as
"powerwall" in conjunction with this UPS and a transformer to achieve
backup for my home
but for your 1-2 kW mobile setup, I would suggest following:
- find a robust 3-5 kVA UPS that has no problem running the "inflate"
and which works off of low voltage batteries, typically you will find
it needs 24V.
- find two EVs such as the Leaf that can be parked close enough to the
UPS to run 2 sets of jump cables,
from one EV to one 12V battery and from the second EV to the second 12V
battery to give up to 24V, 80Amp of charging for the UPS.
Make sure you use beefy cables with clean clamps, preferably even attach
Anderson connectors so the jump cables can't slip off the UPS batteries.
-place both EVs in "Ready - park" mode and lock them with the physical
key that is hidden in the FOB, so you can leave them behind while they
continue to power the UPS, drawing about 1kW which adds up to 5% of
charge loss per hour of powering the UPS.
- make sure you start with the UPS batteries full for the first minutes
when you have to deliver the 2kVA to the inflation cycle, after that the
EVs should have no problem maintaining the UPS batteries to deliver
- make sure the UPS is at a safe spot, away from heat or have a blower
pointed at it (with cover off?) to cool internals for extended time use,
since many UPS'es are only designed for intermittent use. Preferably use
a double-conversion unit which *is* designed for continuous duty.
This suggestion requires nothing more than finding a (used) UPS and some
creativity and scheduling of 2 EVs.
Make sure that the 2 EVs never touch, as their chassis are at 12V
difference, you would short one battery if they did touch.
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Bill Dube via
Sent: Thursday, February 01, 2018 5:46 PM
To: Dan Kegel via EV
Cc: Bill Dube
Subject: Re: [EVDL] Question: EV with a 110v outlet with 2KW power
You can only _continuously_ draw 80% of the maximum amperage out of any
household circuit. (The wiring over heats.) Since a large fraction of
115 volt outlets have a 15 amp breaker, (some have a 20 amp) you can
only draw 15 x 115 x 0.8 = 1380 watts.
On a 20 amp, 20 x 115 x 0.8 = 1840 watts.
For a limited duty cycle (short time) you can draw the full amperage,
but only for a very limited time.
That is why every 115v heater that you can buy in the store is rated at
1600 watts, at the very most.
Doesn't matter how big or how fancy or how much they cost, they all are
limited to 1600 watt output.
On 2/1/2018 1:59 PM, Dan Kegel via EV wrote:
> Hi all.
> question for the EV connoiseurs out there:
> I have a 2013 Nissan Leaf with a ChaDeMo port. Are there any portable
> V2G units that can plug in and provide 2KW of power?
> Alternately, are there any other EVs that support such a thing?
> I saw such a thing at a Nissan booth at a recent event.
> but it didn't look like it was aimed at mobile use.
> And evidently they have a new system which would meet my needs:
> but it's only available in Japan for now.
> The application is a bounce house at a green fair; evidently those
> need 2KW during inflation, and 1KW during operation ( see
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> Please discuss EV drag racing at NEDRA
Please discuss EV drag racing at NEDRA
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)