Looking for a way to turn on the Zephyr vent fan during charging of AGM batteries in an insulated battery box that is in a cold weather location. Charging can come from solar or generator.
Thanks,
Jeremy
asked
Turn on Battery Box Fan with Multiplus-II 48, MPPT-258, Cerbo GX
You could use a fan control module that's triggered by ambient temperature. Something like:
https://amazon.com/Diymore-Temperature-Manumotive-Controller-High-Temperature/dp/B0752GMMPJ
Thanks for the suggestion, but I am more looking to vent any hydrogen that may accumulate while charging, so I don't believe temperature controls alone would help that
Hydrogen is lighter than air so it rises. A small vent tube to the outside world from the top of the box, and a place at the bottom to let air in might be enough.
I haven't looked but you might be able to program the relay on a BMV to close when battery current exceeds a preset value.
