Next message: Letsgosailing: "Re: lv-ab: Good day all. New to the list."
Have the new inverter models reduced the radio frequency interference to the point where they don't mess up other electronics on board? It's been a few years since I checked, but the word I had in 2002 (?) was that none of the manufacturers took the trouble to provide effective shielding.
Rufus
> ----- Original Message -----
> From: "Norm of Bandersnatch" <>
> To: "john Christensen" <>, Liveaboard <live-aboard at crux dot astro dot utoronto dot ca>
> Subject: RE: lv-ab: Charger
> Date: Mon, 26 Mar 2007 10:05:15 -0500
>
>
>
> I just measured my Trace 2.5 KW sine wave inverter idle current and it was
> 1.6 amps.
>
> The efficiency curve is very poor at low loads because of the "overhead"
> load, the power needed just to operate the unit without regard to the load,
> but jumps up quickly to about to about 90% at 200 watts. The highest
> efficiency is about 92% at around 500 watts and then is sags in a straight
> line to 80% at full load of 2.5KW.
>
> Their bigger units (3, 4, and 5.5 KW) running on higher DC voltages (24 and
> 48) have somewhat better curves running from about 95% max efficiency and
> sagging to 85% at full load probably due to less IsquareR (heat) losses at
> higher voltages (and less amps).
>
> Maybe someone else could fill us in on the stats on smaller units.
>
> Norm
> S/V Bandersnatch
> Lying 30 07.715N 081 38.394W
> Julington Creek Estuary FL
>
>
>
> > [Original Message]
> > From: john Christensen <>
> > To: Liveaboard <>
> > Date: 3/23/2007 5:39:42 PM
> > Subject: lv-ab: Charger
> >
> > Thanks for the reply. I have wondered about this. I have a friend here who
> > is a marine electrician and he says that it will only use what is actually
> > drawn no matter whether it is 1000 or 2000 the guy in the shop also said
> the
> > same. I was not convinced but remembered reading somewhere that it will
> draw
> > way more to crank up a 2000 inverter rather than a small one. How about
> you
> > Norm what is your take on this. I have 2 electricians saying this is not
> the
> > case and 2 saying it is the case?.
> >
> >
> >
> > Are we having fun yet?
> >
> >
> >
> > Thanks to you all
> >
> >
> >
> > John Miami
> >
> >
> >
> >
> >
>
>
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