DD Hub Motor 9C 2810 in 26" wheel $150.00 USD methtek.com
Controller C7225 (72v 25A shunt to 40A) $125.00 USD methtek.com
Cycle Analyst CADP $120.00 USD methtek.com
Battery Headway 38120HP 8AH 28S1P DIY designed 0.25" thick T6 6061 nickle plated Aluminum busbars, no BMS, HX-JST's $700.00 USD
I sent Methods an email with items for purchase. Methods sent me a price breakdown and paypal email. Shipped to Up State NY in 5 days
Methods is amazing at answering questions. Communication is topnotch!
Hub motor in 26" wheel was in Double Cardboard. Extra items inside were bubble wrapped and taped securely.
This is build #4. I like to build, fix, design things. First electric propulsion project was made from off the shelf products
not designed for ebike propulsion. lol see: Electric pusher trailer in signature block. I was Comms/Electronics in Military for 22 years.
VE7TAC Amateur Radio Op. I can wire a house from Meter base/panel/outlets complete.
I been using this new build for 2 weeks. Although the FS Mountain bike was my son's 10 birthday present 9 years ago, he didn't use is much and it is in mint condition. (I've been eyeing it up for a while now.....lol)
I didn't weigh the 9C2810. First voltage was 12s1p 38.4v nominal Pack (41v off charger) and 24kph (had to start somewhere).
Second voltage was 24s1p 76.8v nominal (82v off charger) and 45kph. (now we are getting somewhere)
Third voltage was 28s1p 89.6v nominal (95v off charger) and 55kph (hold on... nice torque)
What's nice about high voltage is that my speed increased, but my Watt Hours per Kilometer remained very close. (same course/near same conditions)
38.4v 19wh/km @ WOT 24kph 600-1000 watts (battery pack 10lbs)
76.8v 24wh/km @ WOT 45kph 1000-1500 watts (battery pack 20lbs)
89.6v 24wh/km @ WOT 55kph 1000-1600 watts (battery pack 23lbs)
Rear tire is Bell Beach at 60psi
Front tire is stock mountain knob at 60psi
3.6ah used over 13km
0.5kw/h to recharge entire pack [Pack split into 3 (2x 12s1p on 2 x 37v/2a chargers) and (1x 4s1p on 12v/2a Venom charger)]
@ 80% DOD to expect 23km distance at WOT with moderate pedaling.
CA-DP IMHO is a must! I have it set to 28amps max. So @ 28amps and 95v 2660 watts with peaks around 3000 watts
The Cycle Analyst keep track of wh/km or wh/miles, amp hours used, distance traveled etc... It's your FUEL GAUGE! ... never run on empty!
The 38120HP 8ah Headway do not drop below 3.1v with a 2C load (1500 watts) In my case... 17amps at 87volts.
And.... 3.07v 4.375C (3,000 watts) 35amps at 86 volts. I'm liking high voltage set ups