THANK YOU, for bringing this thread back on track.
The original question was (and exactly what I was looking for)
toypusher wrote:If I put a box on the tongue of my tear that is big enough for a battery charger/power supply and the battery, how much and what kind of ventilation would I need. Might want to try to get some extra storage in the box also, if possible. I would of course, also put a battery box inside the other box to put the battery itself in. That way, I could connect shore power to the front of the tear, and hopefully keep the power cord out of the way a little more. That would also save some space in the galley area by moving the charger up to the tongue.
Don't nobody get upset with me, but it got de-railed on Optima batteries.
I have the same situation I'm working on. I'm using the HF $70 tongue box and trying to get as much stacked in it as I can. I installed a battery tray (not a box, but the tray's with the strap/buckle to hold the battery down) centered in the front of the tongue box. My shore power connector will be through the lower left side, my 110V to the galley is comming in the lower left side in the back along with the 12V. I have enough room between the back of my battery and the tongue box to mount an inv/conv (whichever you call it: 12V - 110V with cooling fan) inside with an inch or so to spare. That leaves me with enough room on each side for my al stab jacks (which my neighbor gave me by the way
) and my 12ga 50ft ext cord (another donation).
My intentions were to put some kind of louvered & screened vents in the back side of the tongue box, the question is (and I think originally was) how much venting do I need to be relatively "safe". 4) 1" vents, 4) 2" vents, maybe a long vent on each side say 2" x 4" or 2" x 6", not sure what's available? My lid will be up so I can turn on the inv/conv, so it will have some "fresh air".
And Yes, I do understand that one of the elements for fire/explosion is oxygen. lol
I'm not going to hold anyone liable for anything, just looking for thoughts and suggestions in honest / layman's terms and not the theritical physics of an undetermined thermal/humidity/barametric/altitude/geometric/global warming effects that I couldn't even figure out with a slide rule folks.