Thank you very much for your answers! I understand that I don’t need such a large panel, but that one is already in the field an I could plug into it.
Would this transformer from 12v to 6v work? or do you recommend a different one? https://www.amazon.com/SMAKN-Converter-Power-Supply-Module/dp/B00CXKCRME/ref=sr_1_4?ie=UTF8&qid=1508029619&sr=8-4&keywords=voltage+reducer+12v+to+6v