You just need more power.  My Xantrex 1000W about $80 on sale works very
well with power tools.

>From: Loren Busch <starwagen@GMAIL.COM>
>Reply-To: Loren Busch <starwagen@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Installing a 1000W converter
>Date: Mon, 26 Jun 2006 13:19:31 -0700
>
>RE: I can use a power drill off of it, my rotozip for cutting rusted
>exhaust
>bolts, a small 110 vacuum cleaner,
>
>Don't count on it.  Unless you have purchased one of the very expensive
>inverters that provide a near perfect sine wave output you are going to
>find
>the power/effectivness of your power tools down noticably.  BTDT with my
>700
>watt inverter.  The tools will work, but not the same as from shore power.