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Do-It-Yourself (DIY) Question & Answer Forum
Help with additional lights on a Mobility Scooter.
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<blockquote data-quote="Doc Hudson" data-source="post: 473674" data-attributes="member: 1607"><p>Not sure how correct my theoretical calculations are but here is what I was thinking:</p><p></p><p>If the original spec can do 25miles off a 50ampHour full charged battery that would suggest it is consuming 2ah per mile? (50ah / 25mile = 2ah per mile)</p><p></p><p>Don't know what the average speed is but guessing at 5mph, if it can do 25miles fully charged at 5mph that suggests 5hours of usage? (25miles / 5mph = 5hours duration)</p><p></p><p>5 hours to consume 50ah suggests 10amps per hour? ( 50ah / 5hours = 10amps per hour )</p><p></p><p>Your proposed lights rated at 36watts (for the pair) will draw 1.5amps. (36watts / 24volts = 1.5amps)</p><p></p><p>So if your lights are switched on for 1 hour, that will take 1.5ah, which is a bit less than the 2ah per mile.</p><p></p><p>That implies for every hour your lights are on you will lose about 1 mile of total range.</p><p></p><p>Or, assuming you have the lights permanently on, every hour you wil use 11.5ah (10+1.5),</p><p></p><p>which gives 4hrs 20mins battery life, at 5mph that's approx. 21.5miles range, if you are out in the dark with lights full on for the whole journey.</p><p></p><p>That all made sense as I was thinking it though, but I may have missed something obvious? Perhaps some of our other members double check my logic?</p><p></p><p>Doc H.</p></blockquote><p></p>
[QUOTE="Doc Hudson, post: 473674, member: 1607"] Not sure how correct my theoretical calculations are but here is what I was thinking: If the original spec can do 25miles off a 50ampHour full charged battery that would suggest it is consuming 2ah per mile? (50ah / 25mile = 2ah per mile) Don't know what the average speed is but guessing at 5mph, if it can do 25miles fully charged at 5mph that suggests 5hours of usage? (25miles / 5mph = 5hours duration) 5 hours to consume 50ah suggests 10amps per hour? ( 50ah / 5hours = 10amps per hour ) Your proposed lights rated at 36watts (for the pair) will draw 1.5amps. (36watts / 24volts = 1.5amps) So if your lights are switched on for 1 hour, that will take 1.5ah, which is a bit less than the 2ah per mile. That implies for every hour your lights are on you will lose about 1 mile of total range. Or, assuming you have the lights permanently on, every hour you wil use 11.5ah (10+1.5), which gives 4hrs 20mins battery life, at 5mph that's approx. 21.5miles range, if you are out in the dark with lights full on for the whole journey. That all made sense as I was thinking it though, but I may have missed something obvious? Perhaps some of our other members double check my logic? Doc H. [/QUOTE]
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Help with additional lights on a Mobility Scooter.
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