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Old 09-06-2015, 10:26 PM   #3 (permalink)
Spaghetti Man
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Join Date: Jan 2015
Location: Newcastle, Australia
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Sorry I asked as I have had difficulty finding information sorting through ebike 500 watt and other applications that are not quite what I am looking for.

If I want 10kw of power (my current 125cc motorcycle's power) and I use 4.5 litres of fuel to travel 160km (35km per litre). I would need at least 4.5 x 2.5kw 11.4kw of power in my batteries to make the example 160km trip.

If a Panasonic 18650 is 3.7 volts and 3.4 amp

3.7 volt x 3.4 amp x 1 = 12.58 watt hour.

I need 30 Panasonic 18650 batteries.

3.7 volt x 3.4 amp x 30

= 111 volt x 102 amp = 11,322 watt hour

Is this correct?

What percentage more power should I have to prevent full discharge?

At a weight of 46 grams each the total 30 batteries will weigh 1.380kg which is lighter than my current lead acid motorcycle battery.

If I buy 30 Panasonic NCR18650B batteries for AUD $12.42 each it'll cost AUD $372.60.

Only counting the cost of petrol at current available price I need to get 7303km from the 30 batteries before replacing them.

If they have 1000 power cycles that means I should get something like 160*1000 = 16000 km.

Providing these calculations are correct the electric vehicle is more economical.

Last edited by Spaghetti Man; 09-06-2015 at 11:19 PM..
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