Hi Tom, thanks for the response, as far as the meanness goes I just bristled at the comment 'if you want to go kill yourself' without any meaningful advice. Everything else was fine.
I am seeking honest advice. I absolutely appreciate all the input. I guess what I'm looking for here is an explanation of what is actually happening or could happen with my setup. Corrosive vapors sounds terrible, explosions terrible. Some hydrogen floating around my living room, not so bad. But of course, maybe that is so bad, which is why I decided to stop here for a sanity check.
Here's my logic at present,
an enclosed box with convection venting through vent pipe to the outdoor seems like a place for hydrogen to accumulate in much greater concentrations than a battery box with a perforated lid or lots of top of the box perimeter holes. The box in a large, open room.
I have 500 watts of PV at 24V feeding about 700ah of L16s @ 24V (8 L16s) through a C40 and then powering an outback FX2524
I've had this setup in a drafty little shed for about six months powering the construction of my house.
Again, my possibly faulty logic is that there are plenty of possible spark sources in that shed but I feel like the open soffits vent plenty of air so there isn't a gas buildup.
What I'm trying to figure out is how that is different than a well vented box in my living room where the wiring will be better, and conduited.
Again, and please, I swear I'm not trying to be a pain here, what is the danger I don't know about? I want to understand. If it's corrosive vapors, thats good enough for me, if there are problems with hydrogen buildup then thats good enough.
As an avid electrical tinkerer, I'd like to post here more, so I hope I'm not upsetting anyone. I'm not trying to be dismissive of the dangers, I just want to know what they are.