I am building a tricycle around two 175-200 watt (Output Power) wheel chair motors. I don't know the exact output power because they were salvaged from an old wheel chair and the motors themselves have no identifying information. I've found other places online that claim they are in that range.
I would like to use them to push about 1,000 lbs of steel and human around at Burning Man. The contraption also has pedals that are geared mostly for very low speeds... like going up hill or getting un-stuck.
Right now it has the 24-60v motor control kit from ElectricScooterParts and two (probably faulty) 68Ah, 200CCA deep cycle batteries. They are fully charged (25.5v) but seem to drop down to about 23v when I let the motors go full on.
Now, the bulk of the question: What battery should I get to replace the two defective batteries? What information do you need from me to determine what it takes to make these things operate at full power load for 4 or 5 hours? What can I do to determine the actual power output of my electric motors? (Like I said, I'm only guessing at the power output)
Large Deep Cycle Marine Battery