The 1 gen Voltec battery consists of 288 LiOn cells grouped into 96 "blades" of 3 pouches each "welded" together for a 360V 16kWh (45Ah) full pack weighing 435lb. 96s3p .
I haven't broken it down from it's full format yet, but from what I see (and have read), the "natural" breaks (mechanically and electrically) are the 7x48V (12s3p) and 2x24V (6s3p) modules.
It appears that many have further broken the subpacks electrically (but not mechanically) to operate as, for example, 12V or 24V solar battery backup systems.
Mechanically, each 3p module is probably the smallest you can break down to reasonably, the reason I plan to stop at 12s3p and 6s3p is that is the level at which further breakdown would be mechanically fragile, though if i had a specific configuration to put them in as I took them apart.
Here is a pretty good video of someone doing the teardown:
Indications are they weigh about 45 lbs per 48V sub-pack. I'm looking around for more precise numbers but best I can estimate, a 48V sub-pack is about 12"Wx12"Hx9"D. I'm assuming the right fit for an Insight would be 3x48V.
FWIW they are generally advertised for about $500/48V sub-pack on e-bay but I would do better for the right person/project. These batteries are known for their good thermal and electrical management (e.g.using only the middle 10kWh of the capacity and having liquid heating/cooling). I will test each 3p "blade" and won't offer any sub-packs that are not within a narrow range. I expect to find only one (or very few) bad 3p blades.