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And one last thing, if I were shopping for an inverter right now I'd seriously
try to find a 'true sinewave', I think Statpower is making one. Even though I
haven't run into something that balked at the Heart modified-sinewave output,
true sinewave is more friendly to electronics (I can hear my cell phone
charger from 4 ft when on inverter) and electric motors start easier, run
cooler, and will consequently have longer life.
Rob
R Hepler wrote:
> I believe a motor can draw 2 to 3 times its 'normal' load
> while starting. What you might be running into, though, is
> that by applying a sudden, large load your batteries might
> drop below the threshold voltage of the inverter, causing
> it to shut off. Do you have a multimeter that will retain
> min/max readings? If so, hook it up and plug in the 'frige
> and see what happens.
>
> I *think* you might be able to hook a large capacitor in
> line with the load to absorb some of the startup load, but
> really wouldn't hazard a guess as to how to size it, or
> even how to hook it up.
>
> -Rob
>
> --- "Rich, Michael" <> wrote:
> > I like the idea of multiple small inverters and that
> > might be my problem. I
> > wanted to run the small (4.2cubic feet) fridge off the
> > inverter. We figured
> > earlier the fridge draws about 4.5 amps. However this
> > fridge over powers my
> > 500/800 peak watt and 600/1000 peak watt inverter when it
> > is plugged in. So
> > do I assume it draws far more when it is powered on. Is
> > there a number for
> > minimum watt inverter I need to power this fridge or is
> > there a way to hook
> > both inverters up to get more capacity? Mike
> >
> > -----Original Message-----
> > From: R Hepler [mailto:]
> > Sent: Thursday, March 01, 2001 5:20 PM
> > To: Live Aboard
> > Subject: Re: lv-ab: inverters
> >
> >
> > I *think* the small (<300w) inverters are actually in the
> > 90's, efficiency-wise. If it is the difference between a
> > $300 printer (was that a canon that was mentioned at that
> > price?) at 12v and a $40 printer and $40 inverter at 120v
> > (and $30 blender and $190 in rum), I know which way I'd
> > spend my $300 >;-P (hic)
> >
> > -Rob
> >
> > --- Jim Lynch <> wrote:
> > > Assuming you've got the opion of running the printer
> > from
> > > either 12 VDC
> > > or 110VAC and the efficiency of the device is the same
> > in
> > > either mode,
> > > then the quick answer is yes. The practical answer is
> > > that it depends
> > > on the inverter. Many of the inverters today are
> > better
> > > than 80%
> > > efficient so the answer remains yes, but not a lot.
> > >
> > > Jim.
> > >
> > > > Roger Crawford wrote:
> > > >
> > > > Rob tcbH mentioned using an ac printer and hooking it
> > > up to a small
> > > > inverter to change the dc to AC. Does this method
> > suck
> > > the batteries
> > > > down faster than a 12 volt appliance?
> > > >
> > > > Roger
> >
> >
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