If I bought a rechargeable 4R25 Battery, How many solar cells would I need to keep it charged? ?
I'm building a dog house which the base will be 9-10inches underground, which helps with the build up cool dead air at the base to help keep the house cool. I want to use four(4) computer fans to help ventilate the house from the base where the dead air resides. Near the roof of the dog house will be ventilation holes for the dog, in fact I may use another fan to vent out the hot air. I was hoping that I could use some silicone cells to keep the battery charged, but not sure how many I would need to keep it charged. if it requires too many I may stick with recharging the battery in the house or using a 9v battery for each fan and swapping it out here and there.