$2000 Electric Motorcycle - Fuel Economy, Hypermiling, EcoModding News and Forum

woodsrat · 07-24-2018, 10:05 AM

https://electrek.co/2018/07/23/elect...-for-2000-usd/

ldjessee00 · 07-24-2018, 10:35 AM

Very interesting! My son needs a replacement for his scooter...

Hersbird · 07-24-2018, 02:56 PM

72volt 32ah battery is worth over 1/2 the total price. They need a trail version.

Stubby79 · 07-24-2018, 03:02 PM

Nice! Not sure I like the style, but guess I shouldn't complain for that price.

Daschicken · 09-20-2018, 07:05 PM

Only 30 amp hours? My car battery holds more than that! Not that it's deep cycle or anything, but still. Also, I wish they would have the frame more open, don't be ashamed to show off the battery or motor! Covering it up makes it look like a toy.

vskid3 · 09-23-2018, 12:27 AM

Quote:

Originally Posted by Daschicken

Only 30 amp hours? My car battery holds more than that! Not that it's deep cycle or anything, but still.

30Ah in a 72v battery is a lot more than 30Ah in a 12v that is rated at a 1/20 C rate.

Seconded on wanting a trail model.

teoman · 09-23-2018, 09:09 AM

Looks very much like the electric msx 125 (homda grom) chinese clone.

The ones over here have lead acid batteries though.

Daschicken · 09-23-2018, 10:32 AM

Quote:

Originally Posted by vskid3

30Ah in a 72v battery is a lot more than 30Ah in a 12v that is rated at a 1/20 C rate.

Shows how much I know about electricity!

Hersbird · 09-23-2018, 12:29 PM

30Ah at 72v is exactly 6 times the energy of 30Ah at 12v. Many normal 12v lead acid deep cycle batteries are rated at 100Ah, but that's misleading when compared to a Li-ion 72v battery. For one, you can't use all of that 100Ah on the lead acid or it will only last a few cycles, so more realistically you have about 50Ah if you want it to last say 300 cycles. The Li-ion is probably good for 3000 cycles using all of that 30Ah. Also the lead acid is only rated that high if it is drained slowly over 20 hours, or 5 amps an hour. Drain it at the rate of an electric motorcycle and that 100Ah becomes 60Ah, then take 1/2 of that which means you really only have 30Ah but at 12v. So that battery costs about $100 and is 1/6th the usable energy and 1/10the the usable life of the battery in this scooter. That's why the battery alone is probably $1000.

oldtamiyaphile · 09-23-2018, 10:09 PM

Silent motorcycles, what could possibly go wrong?