Mark,

So indeed you have a microwave :-)

The aux battery will have no problem supporting the 300W amp. Unless you
plan to listen to test tones any musical material will only draws well
under 6-7 amps average current at most even if you play it at an ungodly
loud level. Most audio amplifiers are class AB and a 300W amp will
probably draws 500mA to 750mA tops unless it is very poorly made. Most
of this current is used by the internal DC/DC inverter which steps up
the voltage.

My Alpine 200W bridged amp and head unit draws around 1.5A average
combined at low volume setting.

- Vince

http://gipsyflies.home.comcast.net
1989 Vanagon GL Camper
1996 Land Rover Discovery
2005 Mini Cooper S

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Mark Cumnock
Sent: Wednesday, August 11, 2004 8:20 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Aux. Battery-Stereo Amp question

The Aux Battery will be directly wired to the inverter,mounted behind
the driver seat on the cabinet .

 The cig lighters , will be wired into aux battery so a solar charger
can back feed the aux battery and charge it while camping.I have made a
fuse panel to feed the extra circuits that will be powered off the aux
battery.

The inverter use will be for a microwave, that will have short use(5
mins or less)...1200 watt is recommended. I am going 1800 watt for an
upper margin.

So my question . Is a 300 watt stereo amp to much to ask of the aux.
deep cycle battery going down the road , with the radio and xm unit tied
into the aux battery and a small fan to help blow cool air up front.

The aux battery gets its power from a 10 awg wire from the relay under
the driver's seat. Since the battery stores electrical energy ...that is
why I am asking this , if it were just a straight feed off the 10 awg
wire the standard answer would be no....

Has anyone else tried this??