Setting up a Printer with my Car?

Hi All, I recently bought 2 products http://www.newegg.com/Product/Product.aspx?Item=N82E16828113660[1][1] and http://www.amazon.com/Tripp-Lite-PV375-Portable-Inverter/dp/B0000AI0OF[2][2] to use in my 2009 Nissan Sentra. I print large packages of documents (100+ pages) regularly throughout the day for work. I... show more Hi All,
I recently bought 2 products
http://www.newegg.com/Product/Product.aspx?Item=N82E16828113660[1][1]
and
http://www.amazon.com/Tripp-Lite-PV375-Portable-Inverter/dp/B0000AI0OF[2][2]
to use in my 2009 Nissan Sentra. I print large packages of documents (100+ pages) regularly throughout the day for work. I would like to print them straight out of my trunk and thought I had a decent set-up to achieve this, but the printer dies trying to start up attached to the inverter.
I think I just need a more powerful inverter, I know the copying power draw is 445W, but I don't really plan on using that. I am thinking that going through the initial self-test (firing up the scanner) is what causes the printer to shut-down.
Am I right? I would love to have some more information before I go and make any more purchases.
Thanks!
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