I have salvaged a motor from a treadmill to make a stationary bike generator.
Motor Specs: 180 VDC -4500 Rpm 1.3 Hp 6 amp
I mocked up a bike trainer and using the rollers from treadmill and was able to output 100-160 VDC unloaded, and using a 50 cm piece of Nichrome wire I was measuring 20-30 VDC @ 2-3 amps. But the current fluctuates.
I am trying to work out what I would need to safely charge a deep cycle battery which I understand I will need a controller or circuit to reduce voltage and manage battery charging, but not sure what that would look like.
The generator will be placed in a communal space for people to help power the campsite, so it would need to be idiot proof.
Edit: 1: Battery hasn't been finalized most probably a 120 Ah 12v AGM Deepcycle Marine battery
2: Disregard what load will be coming off the battery as it should not interfere with what can be put into the battery