What type of power supply do I need to run my power chair with a gas generator?

I have tried a 24v 25a and a 24v 31.3a but they both have failed to work well. Once the chair hits a bump or has to jump any small obstacle it turns o

I have tried a 24v 25a and a 24v 31.3a but they both have failed to work well. Once the chair hits a bump or has to jump any small obstacle it turns off and the lights on the joystick start blinking. Any ideas of what to do??

or:I have tried a 24v 25a and a 24v 31.3a but they both have failed to work well. Once the chair hits a bump or has to jump any small obstacle it turns off and the lights on the joystick start blinking. Any ideas of what to do??

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