lithium battery count

[carpinteyrorsb]

probably a stupid question here, because I suspect either way would be fine. just want to make sure there's not something I'm missing.

when planning a 120v nominal lithium pack, how strict do I need to adhere to stated limits on components?

I ask because with thunderskys (3.2v per cell nominal), 120v divided by 3.2 is 37.5

that said, I could go with 37 (118.4v) or 38 cells (121.6v)

I guess my question is - I'm not experienced enough to know if I should err on the more conservative side or more aggressive in terms of how other components will see the voltage.

I assume it doesn't matter, since lead has quite a bit of headroom. Most of my lead cells sat over 13v per when new and gradually work their way down... and actually a fully charged 12v reading is a relatively low battery!

But this is such a big investment, I just thought I'd ask. Things like an older dc-dc convertor rated for 120v won't really care if it's seeing 118v or 121v, will it?

thanks for the sanity check.