Power problem

[Steve Perry]

Hi, I have built an ebike from a kit.
My display has 5 settings ie. Eco, 2, 3, 4, and boost.
When I set it to setting 4 or boost I loose power of the throttle.
Is this normal ?
Thank you for your help in advance.
Steve

 

[Deleted member 4845]

On some kits, yes.

RTFM

 

[Anton]

I haven't heard that one before! It stands for "Read The Field Manual".

Did your kit come with a manual @Steve Perry ?

 

[Steve Perry]

Hi, no it did not come with a manual.
I’m running a 52v battery to a 1500w rear motor, the kit came with a display but I have no idea how to set it up.

 

[Steve Perry]

Picture of the display

 

[Deleted member 4845]

Picture is not helpful at all. Does look like a fairly common display.

There will be a button or combination of buttons that will give you a menu, which should have more menus and several options. Go through them slowly and carefully.

There are lots and LOTS of variations. Combination of controller and display options. Best to try source of kit for more info, or just creatively engage with it till you find the relevant options.

What you have is fairly standard for many jurisdictional requirements. You might be able to get "off-road" mode.

 

[Steve Perry]

Thank you for replying, I can get to the menu by holding down both outside buttons and can click through them using the middle button.
There was no manual so I used the information on the sw900 display to set it up but not sure these settings are correct.

 

[Deleted member 4845]

I'm not sure either, I can't see them from here.

Some are self-explanatory, max speed, etc., but likely a lot of p=5 type crap. Google with model of controller and sw900 display. This can get complex, and speed settings are often hidden to conform to legal requirements. Off-road mode most common. On some, there is no bypass.

One simple trick is to find the wheel size, likely in mm, and then set it for a very small wheel, so it thinks you are going slower than you really are. Speedo won't be right, but ground speed will likely be faster.

It would be useful for you to describe your kit.

 

[Steve Perry]

Great , I will try reducing the wheel size.
I have a 52v 20a battery, the rear motor is 1500 w 48v.

 

[Steve Perry]

MorNon 48v 1500w Bicycle Conversion Kit Electric Bike Conversion Kit with E-bike LCD Display 26 Inches Rear Electric Wheel Hub Assembly Motor Kit : Amazon.co.uk: Sports & Outdoors

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www.amazon.co.uk

 

[Steve Perry]

*Ship from Germany wharehouse, Duty Free, usually takes 5-7 days to arrive. *2 month Free Return, One Year Quality Support(Repair/Replacement) and Lifetime Technical support. *Fit for: E-scooters, Ebike, Golf car, Electric wheelchairs, Electric boats, etc. *Our battery can fit most motor kits, for example: Bafang, Voilamart, but exclude these four : Bosch, SHIMANO, Yamaha, Panasonic . 36V 20Ah with20A BMS fit motor power：36V 50W 250W 500W 48V 20Ah with 30A BMS fit motor power：48V 500W 750W 1000W 48V 20Ah with 50A BMS fit motor power：48V 500W 750W 1000W 1200W 1400W 1500W 1800W 52V 20Ah with 30A BMS fit motor power：52V 500W 750W 1000W 52V 20Ah with 40A BMS fit motor power：52V 500W 750W 1000W 1200W 1400W 1500W Product Features: 1. LED power Indicator 2. With USB port can charge phone 3. Each cell has its own fuse for ultimate in safety 4. Waterproof anti-extrusion endure high temperatures Product Specifications: 48V 20AH 30A/50A BMS Watt Hours : 960Wh（48*20） Configuration : 13S 8P (13*8=104 18650 cells for this battery pack) Cell Specification: 18650 3.7V 2500mAh 8A 3C Power Cells Battery Net Weight : ≈6.1kg Cycle life(time)：1000+ Battery Dimensions: 364mm*232mm*64mm*343mm*85mm Way of charge: CC/CV. Standard charge Current: 2A Maximum continuous charge current: 5A Max Continuous Discharge Current（BMS）: 30amp / 50amp Charger : 54.6V 2.5A Discharge Cut-off Voltage: 39V Charger input: AC 100-240V Charge Temperature Range: 0 - 45°C Discharge Temperature Range: -20 - 60°C ------------------------------------------------------------------ 52V 20AH 30A/40A BMS Watt Hours : 1040Wh（52*20） Configuration : 14S 8P (14*8=112 18650 cells for this battery pack) Cell Specification: 18650 3.7V 2500mAh 8A 3C Power Cells Battery Net Weight : ≈6.5kg Cycle life(time)：1000+ Battery Dimensions: 364mm*232mm*64mm*343mm*85mm Way of charge: CC/CV Maximum continuous charge current: 5A Max Continuous Discharge Current（BMS）: 30amp / 40amp Charger : 58.8V 2.5A Discharge Cut-off Voltage: 39V Charger input: AC 100-240V Charge Temperature Range: 0 - 45°C Discharge Temperature Range: -20 - 6

 

[Capt Kirk]

Great , I will try reducing the wheel size.
I have a 52v 20a battery, the rear motor is 1500 w 48v.

When asking for drive specs, the model number,manufacturer, and such truely helps in getting accurate information