90 Amps is about 1100 watts but that's total, full output, reached at somewhere over 2000 RPM. You need to know what the rest of your system loads are to see what's left if you want to run straight off the alternator.

A better solution is to figure out what loads you want to run and install  a second house battery that's topped off before you leave the house and charged when you are running.

Thanks, Tom Hargrave
www.kegkits.com
www.stir-plate.com
www.towercooler.com
www.grow-sun.com
www.raspberryproject.com
http://goo.gl/niRzVw

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of David Bjorkman
Sent: Tuesday, December 16, 2014 5:39 PM
To: vanagon@GERRY.VANAGON.COM
Subject: power inverters

Hi All;

I'm looking into power inverters.  About how many watts can I safely get out of an inverter with a 90 amp alternator in an '87 Westy running an inline Golf engine?

Dave B.
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