Project Avalon: E-bike build

[razor02097]

So why am I building an ebike instead of buying one?

I checked around to see what options the OEM offers. Well looking around at options I found that there are many... expensive options... There seemed to be a large price gap. Currie enterprises offers a 24v 500W bike in the $600 range. After researching in to it I found many people say it's pretty slow and anemic. I checked one out in person which I found the SLA packs are pretty heavy which makes the bike bulky. I kept searching around and found some pretty nice bikes but they were $1500 on up to $3500! I decided I am going to build one instead.

My goals is a full suspension 26" bike with front and rear brakes capable of going 50+ miles on a charge and capable of ascending large hills... Pretty tall order. I found that I will need at least a 1000w kit.


Searching at several stores and reading reviews of several bikes I ended up choosing a NEXT Avalon as a base for my project. Here is a photo (mine is black). It was $127 after tax from Walmart


Next is to find some power. After reading a few reviews I decided to give a wuxing kit a shot. The kit was $328.20 after shipping from Amazon



Battery decision is pending... Bad experience with vendor... DO NOT BUY FROM VELO VERDE!


To mount it to the bike I'm going to use a voyager seat post rack $22.29 after tax and shipping from Amazon.



Well.... I hope this project goes smooth. I have a budget of $1,500... so far I am a little over $1,400 which leaves about $100 to buy flashy lights, helmet, bike lock, bags and other goodies.

[MTXA]

What a fun project! What kind of range do you expect?

I'd like to do one myself but an upcoming home remodeling project is absorbing my cash reserves. There's a like new Giant Twist being sold locally for $750. I'm tempted, but the war dept. (AKA my wife) would pop a gasket if I dipped into the remodeling money. When/if I build my own, I would use a Workman Cycles bike for the base. They're industrial bikes, made in the USA since 1898, and almost bombproof. Pretty affordable to boot. Industrial Bicycles and Industrial Tricycles from Worksman Cycles Factory Direct Store

Keep us posted on the build.

[razor02097]

Range... well I know it's ambitious especially without regen or solar. I am hoping for 50+ miles on a charge with pedal assist.

In theory 1000W means the motor would draw 20.8 amps... which if I have a 21aH battery I should get 1 hour of full power. I did install this kit on a bike with SLA batteries so I know this kit will propel me at least 30mph on a flat surface, 20mph up a grade and 6mph up a steep hill with no assist. 90% of the places I would travel would be flat. 1% is steep so 28.66 miles at full power without assist (in theory). This doesn't count any down hill...

[Ryland]

I have a Ping brand lithium battery that a friend bought about 4 years ago that has been holding up really well and everyone that I've heard of who has used them has liked them, it also has a BMS built in to the pack.
48 Volt LiFePO4 Battery Packs with BMS (Battery Management System)

going with a 48V system is a good idea, I have a crystalite motor and ran it at 33v and it worked ok, but it's designed to work up to 72v with the correct controller, I kind of wish I had spent extra on a higher voltage controller but I didn't, 48v tho should give you plenty of speed and is a common voltage for everything else.

the $1,500 price range is why I choose that price point for my electric motorcycle, people are willing to spend that much on an electric bicycle, so why not a motorcycle?

On my E-bike, I found that I was drawing around 300 to 400 watts on flat to go 20mph without pedaling, or about 20 watt hours per mile, I'm 250lb's and had a lower voltage pack so I had a bit more line loss then you should see, but 15-20 watt hours per mile at 20mph seems pretty common and with your battery that would give you ~50 miles.

[razor02097]

There 2 very good reasons I chose an E-bike over a E-motorcycle.

#1 I don't have to insure or pay registration for my E-bike
#2 I already own a motorcycle that gets 60+ MPG.

Get ready... this is going to be a massive post.

Installing the wheel I noted the retaining wheel washer wouldn't work for my application so one was made from a large washer. The washer bolts to the spline and bolts to the fork.


The rack came in. It was smaller than I thought but it is super light weight!


Installed.... the controller is just sitting on it for now.


A schwinn bike computer was installed on the right side so I can access functions without taking my hand off the grip.


The throttle went on the left side grip so it is accessible all the time.


A sunlight double kickstand was installed. Neat thing is the bike came with an axle kick stand so I can leave both on there


Installed a metroflash Danger zone light on the rear of the rack. A little modding had to be done to get it to mount the way I wanted it.


Got to keep the tire pressures in check so....


Here is a picture of the tires that came with the bike.


Also have a kill a watt to monitor energy consumption during charging.


Other things I've added include a forward light and more comfortable seat. Here it sits now... in my bedroom lol


Battery should be in Wednesday. The battery is a little smaller in size than the 20ah ping battery and will include a 2A charger as well. It also has a BMS built in the pack. I'll get some pictures once I get it in. I have a bag I found that will fit the rack that should be in tomorrow or tuesday.

I weighed the entire bike. Without the battery, helmet or bike lock the bike weighs 53.4lbs

[razor02097]

The bags are in and installed!

Trunk bag will hold battery, kill a watt, charger, extra tube, tools and a water bottle...






front bag will hold the bike lock and any cargo I need to take with me. It is detachable with 2 snaps.







The controller was also mounted. I wanted to mount it out of the way and outside so it can keep cool.




The battery should be in on Friday.

[baldlobo]

you might need a torque arm for your front hub motor; hub motor's have a tendancy to ruin front forks

[razor02097]

Originally Posted by baldlobo

you might need a torque arm for your front hub motor; hub motor's have a tendancy to ruin front forks

Interesting...I've never seen that until I specifically searched for it. I might take a shot at making one.

[razor02097]

Originally Posted by razor02097

The battery should be in on Friday.

Due to a few icicles hanging off of their tail pipes for 2 hours in the morning FedEx decided not to bother trying to deliver anything that day. As in zero deliveries from that location. They pushed it off until today. They have officially had the package since the 14th of February. eff you FedEx...

[razor02097]

Well all I can say is please for the love of Christ do not buy from Ross Randrup (Velo Verde).

I ordered my battery and what I received... well you decide.

The battery came in a E bike kit box.... packaging included pieces of broken up Styrofoam, bubble wrap and blue painters tape... No original boxes, no instructions, no original packaging.



The battery itself had scuffs on the side and bottom. The only sticker on it had adhesive residue all around it.


The battery was taped up with black tape to hide where the shrink wrap split. There were several scuffs on the side and bottom.


There was no OEM sticker on it, nothing to tell me brand, age, or any other information. All it had was homemade labels...


The connector contacts looked heavily used. There is pitting, burn marks and scuffing from plugging and unplugging a load. It is not evident of one single test but prolonged use.


The charger I received also had wear and no original packaging.



When I emailed the guy he told me the batteries were "tested" on ebikes prior to sale...I have an issue with this... new should mean not used. It is one thing to test the battery under load. I do that at my job. It is another thing to install the new battery on an ebike and use it until you deem testing done. How do I know how much "testing" was done? How do I know how old this battery is? He also admits to removing the original stickers and taping over the packaging splits. He said the scuffs were because he buys batteries in bulk and the adhesive residue is because it's a Chinese sticker.

I was told I had to return the battery at my own expense. Shipping would not be paid for. I believe I am a victim of bait and switch. Do not buy from this guy. I have been fighting this all week and ended up disputing the charge on my card.

I was stupid and should have just purchased a Ping battery... Obviously project BEV has ground to a halt until I can get everything sorted out. Hope this information helps someone out.