Just a small Update on this Ebike testing.
Specifications:
48v 1500 Watts Voilamart motor- wheel with internal controller. Motor 45 newton meters of torque, Personal tested maximum input voltage of 58.8v using a 52v UPS battery. I have had no problem at all running this motor – wheel with internal controller over the first 100 miles of use.
Max Speed : 43 mph (Fully Tested) This speed was tested at night going down a moderate decline, smooth surface, weather 5 degrees C, moderate wind breeze. Battery Voltage was at approx. 57.5v at time of the speed run.
Battery Specs : Nominal voltage: 52v 20Ah UPS battery pack.
BMS Specs : 52v 40A Max,
Minimum battery voltage cut out 42v
Personal tested max voltage of 58.8v
Battery Range: Approx. 20 miles
(Fully tested) on a 7 mile run. Battery voltage started at 58.3 to 53.8v after 7 miles. My estimation is this will easily accomplish 20 miles + range.
Calculated energy per mile
52v*20Ah = capacity of 1040 Watt hours, 1.04 kWh
Cost of this in the UK in 2022 is 28p per kWh
Charger& efficiency
This Ebike uses a switch mode power supply.
Therefore efficiency should be in the area of 80-90%
1.04 kWh charging with an efficiency of 80% would mean a power loss of 0.208 kWh
So the result in energy cost would be £0.336 pence per full charge. Full charge gives 20 miles + range but lets say 20 miles. £0.336 divided by 20 miles = 0.0168 or 1.68 pence per mile.
Fuel price in UK is £7 per gallon. Average car in UK does 30mpg = £0.23 per mile or 23 pence per mile.
Frame: 6061 Aluminum Tubing Mongoose Frame
Tires: Schwalbe Black Jack 26 x 2.25
Price - cost: £1000
Personal opinions:
Advantages:
This is my first (ebike) and personal opinion is this machine is just simply brilliant. Rough estimation of calculated cost of energy per mile is 1.68 pence per mile at worst. Whereas a car is 23 pence per mile.
Getting around the city on this bike is effortless and much faster than going in a car. No waiting in long cues of traffic with frustrated drivers.
This is simply a joy to ride in summer, getting the fresh air and taking in the scenery.
Everybody loves the bike and is outright shocked by the speed.
Down Sides : No rear suspension, would be nice on next project. Cannot take this ebike out in rain or bad weather as the battery is not rated for all weather. I do however plan on changing this in the near future. Obviously another down side is open to the elements and in cold weather.
Certainly, would not dare to leave this bike anywhere while out due to high risk of theft. Teenagers pay this bike a lot of attention!
