Two Wheelchair Battery

Two Wheelchair Battery
Electric Power question?

An electric wheelchair is powered by TWO 12 V lead acid batteries and an electric motor rated at a maximum output power of 1 hp. Each battery has an energy capacity of 600 W-hrs. The motor has an efficiency rating of 85%. Assuming that the batteries are fully charged, for how many minutes can the motor deliver the rated output power before the batteries must be recharged?

Output = 1 hp = 746 watts

Energy from source = 2 * 600 = 1200 watt-hours

Since efficiency = 85%, then

Input = 746/0.85 = 877.65 watts

Time = 1200/877.65

Time = 1.37 hours = 82 minutes

Hope this helps.

Infinitum Battery Desulfator ~ Optimize Battery Life Span 2-3X

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