Bad Idea? I hope not! LOL!
That's exactly what I plan to do, for the reasons you stated. Seems like a pretty good idea to me.
I've already got the batteries ( 48 Nissan Leaf modules ) and the GigaVac contactors for that part of the job.
I especially like the aspect of NOT having over 400VDC live going from the back to the front with no control.
- E*clipse