We are getting ready to finalize our coop . We live in a heavy rainfall area/tropics. Due to all the humidity on a continuous basis ,we are at a standstill as to weather we need to do a solar attic fan in coop or the dreaded electric, due to high electric costs including self install and monthly bill. We have contacted Northern Tools , Home Depot ,Lowes, various rv supply stores as well as solar company. The rv stores online ,we thought could provide a lighter weight solar unit. No one and I mean no one can give us a definite straight to the point answer on : will we ,with a battery be able to provide 24/7 ventilation in the coop? Iti s increasingly becoming closer to the time to move the chicks in to the coop and we are STILL without resolution..Surely someone can shed some light on this ........... Please advise!