[aprssig] Tesla Field Day mode (or any EV/Hybrid) FD load

[spam8mybrain]

I don't know if they go all the way up to 10kW in a portable size, but there's a 3.5kW unit in my RV. They have larger ones for bigger RVs. The plus of this unit is that it's also a MPPT bulk charger for the coach battery bank, so it works both ways through the 4/0 cables linking it to the 2x2 series-parallel array of Trojan T105 golf cart batteries. The inverter brand name in my RV is Maxxum (sp?). Note that the low-DC side wire size needed for kilowatt-level AC loads is significant.
Do you actually need 10kW for your house in an emergency situation?
Andrew, KA2DDOauthor of YAAC long-term "dry" camper roughing it in comfort

-------- Original message --------
From: Rick Green <rtg at aapsc.com> 
Date: 2/28/19  16:43  (GMT-05:00) 
To: Robert Bruninga <bruninga at usna.edu> 
Cc: aprssig at lists.tapr.org 
Subject: Re: [aprssig] Tesla Field Day mode (or any EV/Hybrid) FD load 

On Thu, 28 Feb 2019, Robert Bruninga wrote:

> At the FD site I powered with the Prius, each tent had a 12v battery for
> local power and then the battery was charged from the central power system
> with a 13.8V supply.
>
> And since all of these 13.8V power supplies were modern DC switching
> supplies, that ran directly on the 220 VDC from the Prius just fine.  At
> that voltage it only took under 3 amps to provide the entire FD average
> power and that could be run through hundreds and hundreds of feet of
> standard #18 zip cord with no notable voltage drop.
>
   .. Just so I understand, you were running 220VDC on 18ga zip cord indivudually 
to the separate tents, where it was down-converted to 13.8VDC and buffered by a 
local 12V battery to run the station?  Each station also  had its own 1Kw 120V 
inverter for any equipment that couldn't run directly off the battery?

   That sounds like a workable arrangement.  The only thing that scares me is the 
thought of 220VDC running 'hundreds of feet' in zip cord on the ground with kids 
and tourists playing in the area.  I'd be using something heavier like SJO 
cable, and/or protecting it with flexible conduit of some sort.

But that doesn't answer my specific question.  I would like to have a single 
10Kw 240V split-phase inverter on hand for potential use as a household power 
failure backup in addition to the annual FD deployment.  Such availability is 
mandatory in order to get the expenditure approved thru the budgeting process 
;-)
   Is such an inverter currently available on the market?

-- 
Rick Green, N8BJX

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