24 Volt

[Jay Darst]

The calc for amps at 110 volts to amps at 12 volts-

say 15 amps at 110V = 15 x 110 = 1,650 watts

1,650 watts divied by 12volts = 137.5 amps(at 12V)

because inverters are, at best, about 92% efficient, ya need to
divide the 137.5amps by 92% efficiency, you'll get 149.5 amps (at
12V) to run a 15 amp/110V load.

Fortunately, the roof tops only draw about 12.5 amps at 110V, so-
12.5 x 110 = 1,375watts divided by 12V = 114.6amps divied by 92%
efficiency = 124.5 amps at 12V

Throw in a bit of curve now.

My alternator is actually 14 volts, so the equation looks like this:
12.5 x 110 = 1,375watts divided by 14V = 98.2amps divided by 92%
efficientcy = 106.75 amps at 14V to run my front A/C. Pretty easy
for the 14volt/320amp alternator. Plus the inverter likes to have
plenty of voltage/amperage to convert to 110V, makes it work not so
hard ;~}

Jay Darst
85PT40
Springfield, IL





--- In WanderlodgeForum@yahoogroups.com, "Chuck Wheeler"
wrote:
>
> Just remember that to provide 15amps at 24 volts will require your
generator
> to provide about 83 amps at 24 volts or about 170 amps at 12 volts
in
> addition to the load it is currently carrying.
>
> - Chuck Wheeler -
> 82 FC 31 SB
> Fort Worth, TX
>
> -----Original Message-----
> From: WanderlodgeForum@yahoogroups.com
> [mailto:WanderlodgeForum@yahoogroups.com] On Behalf Of
putneyflash@...
> Sent: Sunday, April 16, 2006 7:52 PM
> To: WanderlodgeForum@yahoogroups.com
> Subject: Re: [WanderlodgeForum] 24 Volt
>
>
> Blair: could you run the fron ta/c off the inverter by tapping
into the
> correct leg? seems that would work better than having the dash a/c
repaired
> and converted from 12 to 134
>
> re brake FC-35SB albany, ga. "sagecoach"
>
> -------------- Original message from Blair :
> --------------
>
>
> Lee, the Outback's are the best in the business and I sell all
types.
> Blair in Oregon
>
>
>
> At 05:57 PM 4/15/2006, you wrote:
> >Hi electricians, My iota charger had an unfortunate encounter
with a
> >welding outlet and I am in the market for a new one. One thing
leads
> >to another and I am now looking at running the front A/C off an
> >inverter for those minor cooling days without the generator.
Then I
> >looked at the currents and now am considering going to and LN 24v
> >alternator(maybe 130A at 24V) and an outback VFX3524M inverter.
It
> >looks to me like I could hook the inverter to one of the 30 amp
legs
> >and put the inverter loads there and that way the existing
selector
> >switch would still work as isolation for the 50 amp and gen use?
> >
> >I have read through the writeup by
> ><http://ourodyssey.blogspot.com/>http://ourodyssey.blogspot.com/
but
> >I don't want THAT much automation. I think the 24v bus would be
an
> >asset for a future solar addition also.
> >
> >Any thoughts on 24V?
> >
> >Lee Benson, 85FC35, Carthage, IN
> >
> >
> >
> >
> >
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