that is so great to hear that someone has concerns about corrosion.
Right on !
good thinking on your part.
It can't hang by just the two upper bolts ?
I wouldn't want to mount through that wall into the wheel well area.

I don't like spray undercoating very much - eventually moisture gets under
it.
I like special high quality paints instead.
I suppose I would seal with a very good silicone sealant ..
but I would be more inclined not to make any holes or screw holes from the
interior into the wheel well.

besides, maybe you do know this inverter is 'the one' that will be perfect
for years to come..
but if you do not actually know that yet, ...
then wait and see if this is for sure 'the one' you'll be using for a long
time. You might not even end up using it, so smarter to not drill those two
lower holes ( if ever ) yet.

Scott
www.turbovans.com

----- Original Message -----
From: "DW" <dcwilton@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, August 22, 2010 5:14 PM
Subject: Mounting an inverter.

>I have a '91 Multivan with a secondary battery kit under the driver's side
> seat. I want to mount an inverter behind the battery compartment (i.e.,
> behind the driver's side jump seat). Due to the geometry of the inverter,
> two of the mounting bolts can be installed inside the battery compartment,
> but the other two need to be mounted below the depth of the battery
> compartment. I assume that this would require the bolts to protrude into
> the
> wheel well. Is this a crazy thing to do? I was thinking that caulking
> would
> be a necessity, but how many other considerations are there? Stainless
> nuts,
> bolts & washers? Should I spray the area in undercoating after
> installation?
> I have a great love for this van and am hesitant doing things that might
> introduce corrosion. If you need pictures I can send you an idea of my
> proposed installation location.
>
> Thanks in advance for any ideas,
>
> DW