Sup ya'll...

A buddy of mine gave me his 400W AC/DC inverter ('cause he upgraded his to an 800W)...
My question is this... Since I've got TWO 400W AC/DC inverters now, would they
be able to run both simultaniously? I've got one running in the back already and now
I'm considering placing the one my friend gave me in the front of the X... Something in
the lines of installing it within the bottom half of the dashboard (side panel near the
passengers leg area). I've seen this done before from a previous post... But can't
seem to locate it witht he search function...

But my main concern would be if both were running "things" at the same time, would
my alternator fry or make my battery explode or something else (whether or not my
engine is running)... Any advice, comments, and concerns would be appreciated...
Thanks fellas...

- Air B