E bike battery capacity?

[sanook 1]

Looking to buy a 3 wheel ebike for the old mil and looking at different battery choices, 600 w 12 a,600 w 20 a,800 w 20 a or 1000 w and 12 or 23 a,is it really a big difference in the power/torque of the bike or moore the size of the battery/usage before charge?

[KhunLA]

36 minutes ago, sanook 1 said:

Looking to buy a 3 wheel ebike for the old mil and looking at different battery choices, 600 w 12 a,600 w 20 a,800 w 20 a or 1000 w and 12 or 23 a,is it really a big difference in the power/torque of the bike or moore the size of the battery/usage before charge?

I would go with a lithium battery only.  I'd also probably only go with DECO brand.  Little pricy, but with the others, you get or don't get what you pay for.

 

I have  DECO motorcycle, and quite happy with it after shy of 2.5 yrs.   Battery still under (3 yr) warranty till Oct 2024.

DECO offers two 3 wheelers:

Family 2

Family 3 

Spec'd about the same, except for motor size & price:

650w ฿39.9k   vs   500w ฿35.9k  Battery 60v20Ah

Not sure if they qualify for govt incentive.

Edited February 4 by KhunLA

[Crossy]

Somewhat simplistically.

 

The W (Watts) of the motor are effectively horsepower (1hp = 750W). More watts = more oomph (but greater battery consumption).

 

The A (really Ah or Amp-hours) is the capacity of the battery. You really need to consider it as watt-hours, you get watt-hours by multiplying Ah by the battery voltage.

 

Very simply, dividing watt-hours by motor power gives you operating time.

 

So, say a 60V 20Ah pack (about 1,200Wh) would run a 600W motor for about 2 hours.

 

There are masses of variables that will affect actual operating time / range. But generally, more watts are more performance, more Ah is more range.

[sanook 1]

1 hour ago, Crossy said:

Somewhat simplistically.

 

The W (Watts) of the motor are effectively horsepower (1hp = 750W). More watts = more oomph (but greater battery consumption).

 

The A (really Ah or Amp-hours) is the capacity of the battery. You really need to consider it as watt-hours, you get watt-hours by multiplying Ah by the battery voltage.

 

Very simply, dividing watt-hours by motor power gives you operating time.

 

So, say a 60V 20Ah pack (about 1,200Wh) would run a 600W motor for about 2 hours.

 

There are masses of variables that will affect actual operating time / range. But generally, more watts are more performance, more Ah is more range.

Thank you,very good description!