I am making a trailer to pull behind my 26" bike. I am wanting to run a bottle dynamo off of each of the trailer tires and charge 1-2 car batteries off of them which will power my light setup as well as phone charger, speakers and various other electronics that I may desire. The trailer, besides being my on the go power source, is all intended to be a mobile power station.
I play a location based game similar to Pokemon go and we have gatherings where we get together and play in a localized area and would like to be able to drop the trailer, with the batteries charged, and have everyone be able to plug in and charge their devices/battery packs then show up later and hook back up to ride off and recharge.
What I need to know is what I need to put between the dynamos and the battery and also what I need between the battery and the usb hub that will distribute the power to all the electronics.
Have also been considering adding a motor to power the wheel so that I can relax some over my longer distance rides(generally ride a minimum of 10-20 miles one way). Had considered finding a gas powered motor designed for a bike but have since come to consider an electric motor, which from my understanding should be able to be wired directly from the battery though if someone has a reason that won't work please feel free to say so.