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Old 01-18-2017, 12:16 PM   #4
Don M
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Join Date: Jun 2016
Location: Ocean Springs MS
Posts: 242
5 yr Member
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Quote:
Originally Posted by Fastskis View Post
Only way to really test it would be to ride 25kms and see if it does that on a charge.
Even that wouldn't prove anything and you would likely be pretty upset with the results. *If* a 25km 'range' was actually ever physically accomplished, it was done under optimal conditions of temperature, load, speed, tire pressure, road surface, elevation change and any acceleration or deceleration, so you personally riding yours would almost certainly give you a lower number than 25km - The manufacturers claim of 25km may never have actually been done . . . . it could be just a theoretical, computer generated, very optimistic number based on average amp draw of the motors at their most efficient speed. The power spent in maintaining balance (which subtracts from range) was likely never figured into the equation

We have two fully electric cars (one for 5 years now) and I can tell you that range varies greatly depending on changes in any of the above factors. At least with a car, the EPA has a set of standards for testing, so the claimed range isn't a 'pie in the sky' theoretical number like you usually find with many other battery powered devices

The good news with the cars is that after 5 years and about 40,000 miles, the battery capacity is relatively unchanged - The cars still go just about as far as they did when they were new, but they have a very sophisticated BMS and charging regimen with the aim of maximum battery life as the #1 goal. The batteries came with a 10 year, 100,000 mile warranty

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