How to do Regenerative Braking on an electric bicycle Q&A#9

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18650 cells (Sanyo GA 3500mAh): goo.gl/J6ONJV
18650 cells (another Sanyo GA 3500mAh source): goo.gl/f10wHH
18650 cells (Samsung 26F 2600mAh): goo.gl/VhpP7T
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18650 cells (Another Panasonic 18650B): goo.gl/tVjREI
18650 positive insulating washer: goo.gl/HBVOuc
Ebike battery cases: goo.gl/W2DLmE
Nickel strip: goo.gl/VIrNQq
Spot welder: goo.gl/KN3Uaw
BMSs: goo.gl/S6gSQx
Silicone wire: goo.gl/xmpbKD
Black 18650 cell spacers: goo.gl/hQxWF6
Vruzend cell spacers: goo.gl/5ReLqA
Large heat shrink tubing: goo.gl/6v1ow9
Small heat shrink tubing: goo.gl/OU3Z6u
Foam sheet for protecting battery: goo.gl/5e71tE
Kapton tape: goo.gl/D6BT57
Chargers: goo.gl/js0T0V
350W hubmotor: goo.gl/K1mYvR
36V/48V controllers I used: goo.gl/nJBnJP
Throttle: goo.gl/UebsNC
Cycle Analyst: goo.gl/RsmE3N
350W Bafang BBS01: goo.gl/peyiYb
500W Bafang BBS02: goo.gl/EsqHu2
750W Bafang BBS02: goo.gl/k81aVH
1000W Bafang BBSHD: goo.gl/MU69oh
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[@hennomarais]

One thing not mentioned in this video is the fact that it saves brake discs. That is my favourite thing about regenerative braking.

[@finophile]

given the cost of a set of pads (like 5 bucks) and a new dis (like how often? at $16) its going to take a few years to make that worth the cost of just changing pads (not even factoring in all the time for fitting it) ... however in VERY RARE situations on super long down hills on super steep mountain roads it may help prevent brake over heating.

[@richardfewer9348]

Henno Marais Thanks Yes Amen

[@pascalkargut3237]

So your favourite thing is not the most useful thing witch is actually charging the battery

[@eastky1901]

I really need this. Iv got crazy hills and I'm burning thru pads and discs

[@elMoNtOwNaGe]

@@finophile why is cost a factor? He likes that it helps save them.... Pointless comment

[@liamstacey419]

Seattle, SanFrancisco: these are the cities for regenerative breaking! especially with cargo. I want it just to save my break pads.

[@estebengonzalez1703]

i subscribe because i love the way you explain ebikes before i buy them and you allways with a smile to explain things and to answer question thank you so much

[@randeb1974]

Ideal. Just as I was thinking I would ask you about the value of regen braking you answered the question. Good stuff. Thanks

[@nishadhussain1603]

Thanks for the info mate, I am desperately looking for this answer for my upcoming project work. This has really helped me to start my work. Need more videos from you.

[@krasispasov8519]

The best and clear explanation how is work regen brake. Thank you!

[@anilporwal2438]

This video is very helpful. I got to understand the Regenerative braking very easily and clearly. Thank you very much.

[@1974HondaCB350F]

The man walking by at 0:48 never knew he was walking directly behind greatness, haha! But seriously, thanks for all of this info Micah. You are the man!

[@deanfelten2951]

Hey, loved this video. I have been asking this question and never got a good answer until I watched your video. Great info and very well delivered. Thank You

[@sarcastrophe6992]

you know most controllers can be enabled its just making a small connection on the PCB

[@kennethgotsch1605]

Learned a lot from your regen breaking video. Thanks a million. Great benefit from subscribing to your information!

[@mtnerb]

excellent video mate. really explained all the aspect of regenerating. keep up the good work!

[@georgevass3669]

Great video, it explained exactly what I was looking for in plain, easy to understand language. Keep up the good job.

[@matthewmaniace817]

Absolutely amazing videos love them all everything is so well executed and explained keep up the amazing videos thanks for the awesome content

[@ebikenewb9713]

Big thank you Micah for this video! Even though this video is nearly 3 years old the info is still pertinent. I just bought a Wallke X3 Pro that has "W-PAS" regen braking and I live on top of a hill. I'm only a few hours from Pittsburgh so you know how the land is around here. It's been in the back of my mind since purchasing the bike about how it may not be safe to charge to 100% and use regen as I leave for a ride. You confirmed my suspicion in this video, Thank you!

[@matijakukec4731]

Maybe try to implement some type of fast charger for your phone on that e-bike, so you pump your phone and discharge your battery to around 95% before you leave the hill before you pump the battery any further. Also I'm pretty sure there could be a feature implemented in ESC that could sense when battery is full and then just short the motor wires so it uses its own backwards EMF.

[@rogeredrinn4592]

I was wondering about this, so a search yielded this video and the answer. My hub motor is the smaller geared type. So now I know to buy disk brake pads for downhill. Thanks Micah.

[@cls9474]

Great video. Apart from saving brake pads: It's great for heavy cargo in the mountains/hills. Then the return is much higher than just stop and go. It's rather: It would be stupid not making use of the hard gained potential energy. The overcharging note is a good reminder and could be prevented with some additional overcharge protection which disables regen when the battery voltage is to high.

[@pinq9973]

Hi Thks Mike, Enjoyed your many videos, very impressed with your good explanations n in-depth knowledge ! This one too, especially on the types of motor that can support regen. charging. One good point was that a restraining torque arm may be needed to prevent axile nuts working loose! With only a few % power recovery on av usage, agree that it is not worthwhile for the extra cost n complexity! In fact, as a frequent ebike user, I enjoy a little pedalling on the way, which might achieve much more than the regen braking, n give me some helpful exercise!

[@shahinladany1166]

Hi Micah, I'm loving your videos up to now and I'm just about to order both of your books on amazon! I'm curious about where you think the e-bike world is going from here. I'm seeing more and more cool companies rising up and coming out with amazing products. I know you must have a good scope on the evolution of e-bikes, curious about your take and where is started, where it is now and where it's going. Thanks for the great videos, keep them coming!

[@myroadtours6147]

Very informative, glad I watched, I'm in the market for an Ebike and I live on a hill.

[@petervavaroutsos1919]

Very well explain And you cover all aspects of regenerated breaking ....thank you sir.

[@zarbonida]

Not all. Why he didn't talk about braking pads? With regen braking you can save a lot of money on braking pads

[@BChristianHagen]

I think your videos are amazing. I love that your answers are entirely comprehensive and effectively cover every angle and color in all corners of whatever subject your discussing. I really enjoy watching you and I also have a questio on for you: I have been to been to tinkering and fixing my ebike for about the last 5 years or so. It's the first- but not only³7⁷ I've ever owned and I bought it used. it's a Motorino Xpr (discontinued) and I love it.ive recently taken a few deeper dives into repair and modification by switching out the whole back tire and motor (break assembly... etc ) with that of a Daymak Eagle's. That was fine. But now I am attempting to replace the controller with one that to has considerably more power because I have also added another 12v battery to the series last time I replaced them... making it a 72 v bike. In doing so I HAVE ENCOUNTERED THE WIERDEST THING... wierd because- as with every other new "thing" about ebike mechanics that I come across I consult KZbin videos (like those you make) for some clarification. but with this item I cannot find any single video, blog or even comment or question about it. here it is & I hope you know what I'm describing and can offer me some Info about an it and tell me if I need to connect it to something or what ( oh yeah I foolishly forgot to take a picture of where the wires that used to run to it came from and what wires they were-... I know!) **It's a small metal box that looks like a "mini- me" of my original controller and says "60v DC - 12vDC" OR or something basically like that and only a single set of 3 wires go into ( or are they coming out of?!?!...hmmmm) this little mystery box. my guess is something to do with lights but what is it and -whatever function it has: why wouldn't it just be done in the controller like everything else? any help would be so appreciated. Thanks All my best, & please keep up the great work! big fan!! Christian Hagen Toronto, Canada

[@swastik313]

Great video it helped me lot, explanation was very good.especially hill case and 100% battery scenario .

[@MasterIvo]

when using pulsed dc coils, you get inductive spikes, these carry a lot of energy that can be restored into the battery. to do so the esc needs to have fast switching mosfets.

[@TheChristianTaoist]

Funny, that odd situation you outlined exactly described MY situation. I live in San Francisco! Anyway, this video pretty much answered that question. Needless to say, if I am starting out on top of a long line of down hill trojectories it means whenever I return I have to climb all the way home. So I wanted to look into this topic as a possible way to help myself home. Thank you for answering that question, because what I wondered was how starting off fully charged, going downhill for a pretty good ways initially, would effect the the system. Imagine if you hadn't laid that one exception out like you did, I would still be ignorant in a bad way.

[@hvdhombe]

Thanks for this video, it helped me a lot to become more realistic about the pro's and con's Thanks!

[@wozzawarren]

I just discovered your channel. Awesome!

[@codyforeman153]

Love the video this month and it was very informative

[@arikfridman]

Love your videos, keep up the good work!

[@dalehall7139]

Another good informative video!

[@MrRasZee]

yes, i got a golden motor, magic pie 3, rear wheel drive, and im going to set me up some regen, thanks for this

[@BrunoPOWEEER]

Yeaahh.. FANTASTIC video!! You even mentioned that very specific scenario riding a fully charged battery downhill... haha... it's hard to pack all that information in one video, you managed to cover a LOT and I'm sure lots of people will ask even more questions and second video will be up soon haha Next video mention about the powerful direct drive mid drive with regen (I sent some links on your Facebook post) Maybe just quickly mention about bigger bikes like Stealth Bomber, LMX, custom DIY Raptor/Vector and maybe even mention Zero & Alta motorcycles (people can do a Google search on these names for more info). Well done mate... you're pumping some AWESOME content!!! Congrats =]

[@Nando85ec]

Very informative, I wondered about the efficiency of regenerative brakes on ebikes, 8 percent seems very little if you rely entirely on electricity to ride that bike. I guess the prices for that technology doesn't compensate the price (about twice as much). Thanks again, nice video.

[@martinjean5198]

I was waiting for the answer :D thank you very much !!! :D Awsome 👍👌Your videos help me a lot !

[@leekrenik7545]

Great info on Regan braking

[@victor440_]

thanks great info learning a lot from you also I bought your battery book I need to get the e bike book

[@Awsomeman328]

I was just wondering about this same topic on one of my commutes last week and as I live on top of a hill, I can see how I could sometimes run into the overcharging scenario.

[@matthewm9792]

Love your work! Keep it up!

[@shackman9566]

Thank you again. I live in an area north of Pittsburgh and its mostly up or down not to much level ground around here. Im planing on a tadpole recumbent build from scratch and would like to go electric. I will be buying your books soon. I have several plans for trike from atomic zombies. Ive built other gas powered bikes but engine vibration noise etc do make them less desirable. I would love to impliment some flexable solar panels onto a bob type trailer to carry trip gear as well as spare battery in charge.

[@stephenhartley77]

Great video, I'm sure with the growth of e bikes the regeneration options will improve. I just hate brakeing when cycling :D

[@wjf213]

Another great and VERY informative video. I really learn so much from your videos and getting a notification that you put one out, is like Christmas morning and getting presents. haha I didn't think regen braking would be too big a benefit unless you lived in the rocky mountains or maybe a cargo type ebike where you're hauling heavier loads, but like you said, every little bit adds up and a few % here and there starts to add up over time. It reminds me of one of the things that my father told me about managing money when I was a boy, he said "Mind your pennies and your dollars take care of themselves". I think if I were to use regen braking a lot, it might be nice to have a charge port or two for maybe a flashlight, cell phone, or even one of those portable battery banks to charge cell phones on the go, and then that would act like a load bank of sorts if you really could get THAT much out of braking. Keep up the great work.

[@mr.blackhawk142]

Hi Josh! I'm in the mountains of Kootenays, BC, and what I like about my Grin regen is the GMac geared rear hub motor gears down and helps a lot slowing me down on big hills. My bike has been NOT RUNNING for 3 mos and I have narrowed it down to the regen switch sticking, or somehow cutting off the motor until I power it OFF, then start again, but every time I BRAKE the same thing happens. It also OVER-BRAKES 'electronically' (I think) at times. I'm going to replace the levers and see if that fixes it. I already replaced the controller, and the battery. I'll check back after I fix it.

[@felicelamanna3654]

All batteries have a maximum C rating for charge and discharge, usually a lot longer to charge. All riders know breaking is almost always a faster change in speed than accelerating forward so all this energy if sent to the battery would damage said battery. The controller must limit the current causing large losses in efficiency, we must still rely on friction breaks. Also I cannot agree with the comparison to cars weight, or vehicle less than load, they are technically each a mass in motion, where the challenge is recovering and storing that energy. This video is well done and informative.

[@barrypybas8996]

Each year the Google Gravity Games have an Engineering Challenge class. In 2017 the challenge was to coast down the hill with an electric STEM Cycle whose batteries are initially depleted. Using regen braking, charge the batteries while coasting. The course was approximately 500 feet long. Once you got to the finish like, the driver could select electric drive and back up as far as the batteries would enable. Our high school STEM Cycle has a 48V 25A hub motor with regen controller. Our driver was able to back up 373 feet to win the event. I don't know the efficiency percentage here. Our battery pack consisted of 7 Nissan Leaf dual 4.2 volt cells in series. Thought you might enjoy this unique application of regenerative braking. Enjoyed the video, bought your E-book via Amazon so we could learn more in regard to applications of the smaller 18650 batteries in our STEM education. Best regards, Barry

[@ramjet4025]

A long winded video to explain that regenerative braking is impracticable and not worth the extra expense. It's mass time speed and around 50 stops in 20 miles might reach 5%. However, if you are going up and down long hills, that all changes, If you go up a mountain and down a mountain, 50% of the distance down, at 50% efficiency would add up to a 25% efficiency. The only way it could reach 50% is if it was all downhill, from the start. To look at it another way. For every mile downhill, you might gain 1/2 a mile in range. Correct me if this is incorrect.

[@audigex]

Efficiency of regenerative braking is an interesting question - it's certainly possible to make regenerative braking more efficient, but to do so you basically rely on reducing drag: since drag is (as I'm sure you're aware) proportionate to the square of speed, you can get much better efficiency by travelling very slowly. Going downhill at very low speed and basically converting your GPE directly to chemical energy in the battery, then slowly converting it back, will reduce drag a lot... but isn't much use in the real world since the point of an eBike is to travel at a decent speed

[@kresimirzezelj8530]

@Stephen Morton Well said! Not to mention having to replace disc brake pads much seldom! I was considering putting high capacity caps in parallel with the battery, to store power with much less resistance then with the full battery and enable quick boost when accelerating again. Worth a shot?

[@kresimirzezelj8530]

@Stephen Morton Thanks, makes sense. I was thinking of using Trinket for hooking up the brake switch and a transistor to charge the capacitors when braking. But looking at the bus system schematic would definitely come in handy. btw, I use my pas ebike for a 40mile round trip commute and definitely less lazy then taking the public transport or a car but still doable every day unlike normal cycles :) 1000 miles every month!

[@andresrincon6058]

thanks for you're information learn much from you !...have a little question...will the regenerative function will make the wheel rool Harder than it rools normally when you're going down hill ......??

[@geebonzo]

I ran into the BMS issue with a Golden DD. It had regen when I used a 36v Lifepo from China. I got a 48v Shark and no regen. The regen made for a nice amount of braking. On a basic build the brakes may be a weak point, so I'd say the regen is a big plus. Starting on a hill I guess it would help to know the amount of charge. Subtract that from a full charge and then stop the charging a bit below that amount. Can't do it on most chargers. I suppose a fully integrated DIY industry would look at different motors, BMS boards, chargers, etc and configure specific systems. Thanks for all the links. I noticed a couple of the links aren't working.

[@deimosphob]

You can regen with mid-drive, it just has to be directly connected to the drivetrain like a motorcycle, you can do that with one of the jackshaft kits for motorized bicycles and a swap from a freewheel hub to a fixed hub.

[@andrewhunt4777]

Hey Micah do you think you could make a video about the cycle analyst?Basically how to get the most power out of the cycle analyst along with your controller.How do you make them talk to each other and get everything your bike can output.

[@ThreePulleys]

If you don't have a regen controller it may still be possible to add resistive braking. It saves a lot of caliper brake pads on my old bike here in a very hilly place. I have 3x 1 ohm 50watt resistors in star connection across the motor leads via a big two pole pushbutton on the handlebars. Also included a 20w lightbulb to use some of that free power. Brake pads are not expensive but my time is valuable.

[@Dana5775]

Regen can really put a strain on the drop outs. (Given a hub motor ) Imagine doing 40 miles an our and suddenly you touch the brake just enough to activate regen the slow down is like going from third gear to first gear depending on settings. This reverse torque will eventually round out the rectangular dropout into a round drop out despite the crappy torque arms recommended. I have two torque arms on each side and still a problem!

[@OrganizedReactions]

I like using Regen. It saves wear and tear on my brake pads and also prevents brake lock up, kinda like (ABS)

[@todmaudlin8654]

I always prefer the option of whether to lock brakes or not. ABS in my first auto caused accident. ABSWill lock up and slide and you can’t control it. It doesn’t take in changing substrates you may encounter. I started sliding through intersection when tires touched painted lines iof sidewalk crossing. I would have let off brakes on first line and stopped before secound

[@todmaudlin8654]

Now I always disconnectABS systems!

[@Bizzybugproductions]

Exactly what I was looking for!

[@ReefHeater]

I can't decide between a DIY gas bike, or a DIY E-bike! I think I want to do an e-bike, for reliability, but I'm worried about range, and how they handle below 0 degrees F weather... also, I'm a novice, in batteries and electronics, but your channel is helping A LOT! Thanks!

[@quentinrufin4025]

I built two ebikes and i had no DIY experience. My desire to build it was high. For simplicity you can buy a battery at em3ev.com/. No soldering. Also, ebikes work down to -20 Celcius. HOWEVER, they need to be recharged above 0 celcius

[@ReefHeater]

thanks for your input! i guess i just cant afford an e bike build, ill have to start with a 4 stroke gas bike, i have more experience with that type, anyways. Thanks!

[@DeadlyDanDaMan]

Cold will drastically lower the charge you get out of a lithium ion battery, and NEVER charge a cold battery. You should always charge at room temperature if possible, but 100% for sure above 0 Celcius (32 Fahrenheit for those that are dumb). Discharging a cold battery is completely fine, but like I said, you'll get a drastically reduced range.

[@jonasohrn]

Thanks for the informative video. Can it not feel strange with just have an on off electric break. Would not a progressive break better? It a big difference breaking force in a downhill compared stopping at a red light.

[@ajinkyadalvi4761]

got good knowledge about the possibility of regenerative system installation in e-bike, and my question is that if we want to track how much energy is generated from the regenerative system how to design such system and log the data.

[@SkyGizmmo]

Great content and my comment ; the trail ride to a summit is a wise and perfect profile for use of regeneration circuit. Does a combo charge control /BMS exist?

[@elcykelguidense]

Excellent video BUT how does it work? How many volts does the motor generate and how many amps? These are variables i'm concerned about. Could a fuse work for over voltage/amps?

[@subashpokhrel7628]

Hello Miach, thank you for posting such informative video. I am planning to attach a front wheel drive hub motor for a common. I am planning to do this for differently abled people. Can you suggest if it can be auto braked unless one uses the throttle to move it. Hope you will make a video very soon for this. Thank you in advance

[@heart0fthedrag0n]

Love your videos, very informative. I have a question though. I am buying a new battery and I was wondering, does it need to have the same port for imput\output or can it be done using different ports?

[@samguapo4573]

Regen braking is good for saving your brake :)

[@rajareddy3339]

Hiii I have been seeing your viedoes in KZbin .How can I use regenerative braking for the sway bike. How I can get efficiency torque to bike.which batteries can provide more life .

[@margallamora6772]

Goodday siy. May i ask where can be posible to test the regenerative braking output by using multitester. I hope you notice i just this for my thesis. Thank you your vedio really help 🥰

[@ianorourke]

Super content very helpful!!!

[@j_smooth9007]

Great video man. Very informative. I am confused though because surron x bikes are mid drive and has regen braking. I know it’s more difficult on a mid drive than direct drive hub drive but it is possible.

[@spunkypooch4934]

Very informative! thank you.

[@webslinger2011]

E-TWOW scooter is equipped with regen. I have a 24v with 250w motor. 4.0Ah battery gets about 8-10 kms.

[@hardergamer]

Nice vid Micah, and I'm getting about the same using Regen 4.6% avg, but its more the point saving wear and tear on the brakes that i like

[@EbikeSchool]

That's a great point, it does save your brake pads! I should have mentioned that... where were you 12 hours ago?!

[@hardergamer]

Haha i will try next time!

[@poporingME]

@@EbikeSchool Please pin this comment for others to know.. Thank you..

[@theodicy4thinkers218]

I appreciate your videos:-) And have a question for you. How to replace the wire harness going into the hub motor, if the wheel loosened and twisted the wires so much that they cut themselves and broke the electric connection :-(

[@RIPPERTON]

On my Electric Daihatsu Mira, the variable regen function built into the clutch pedal was responsible for 27% of my range. Used to get 80 to 90 km with the 8.5kWh LifeTech pack. Worlds most efficient electric vehicle conversion.

[@EbikeSchool]

That's incredible!

[@ramkrisan1435]

Sir please Tell me that BLDC regenerative power motor controller wich used in an e bike, is it will be suitable for used lithium ion battery pack in this e bike.

[@timothywatson9617]

Good work

[@kristianwhiskin1070]

Mine has everything you mentioned including the switch in the brake lever and the connector on the controller, it was a £150 kit so pretty cheap but it still has everything you mentioned is it likely that i have regenerative braking?

[@TrackingWidgets]

Good tips, thank you!

[@Xecoda]

In making a regenerative breaking system do you think you can adjust it for specific speeds?

[@aljay1965]

i have a new radcity 2020 and about 500miles the back brakes started sqiulethe, pads were still good so figured it was the disc somehow got bent or warpped, well i used to build gas bikes and doing so i never put rear brakes on because did not want any addition drag on the well besides spocet and truing issues, so took the rear disc brake caliper of now this is what have (and love it) left handle bar front brake for hard braking and right back brake for soft braking only. whats your thoughts on this?

[@RobertBeriault753]

Do you think that towing a 100 lb trailer you would save on the brakes when going down long, steep hills? I such hills, the brakes can get very hot.

[@rollediaz1536]

Great Video...

[@RicardoCerveraBlanco]

Hi, i wonder if you could help me figuring something out, i recycled an e-bike battery, i could get more of the same but this battery has a 8connector CAN bus in the bms board i dont know why?!. Any idea if i can use this battery without anything connected to this?.

[@duzzd]

Great Video Mike, it helped me a lot to decide should I use regenerative braking or not. I do have one question. How can I adjust controller to cut the electricity to the motor when I hit the brake, on a controller without regen? I will use thumb drive or torque, so I don't wont to brake and motor running at the same time.

[@duzzd]

I just realized how stupid my question is :)

[@adrianortega4071]

very good video

[@tsavage4185]

Would regenerative braking make sense on a mountain bike where there is a lot of up and down hill travel or does the weight difference counterbalance this benefit. Thanks

[@juliebagley7039]

Hi Mike Watched vids on building battery's 1-5 great well done. I have a battery that shows 20% on battery monitor but 25 volts fully charged on multimeter, when attached to bike only provides power based on the 20% reading for limited time is there anything I can do to repair problem? The charger goes red saying it's charging then after 10 mins goes green to say complete, after limited use at low power multimeter shows still 24volts. Can you help Many thanks Tony

[@nigelmisso6360]

How about "dynamic braking" as used in diesel-electric and some electric locomotives? Specifically for a tandem with a heavy trailer to control downhill speed. Some tandems have drag brakes for this function, typically a drum brake designed to provide drag, but not enough braking force to provide reasonable stopping distances. Dynamic brakes work by sending the current generated by the motor(s) into a resistor network (typically fan cooled on locomotives).

[@gerardpaulelvina278]

Are differential motor ebikes / trikes also capable of regen braking? I noticed mine to do it specially on downhill routes. My bike has ABS function but not really sure if it does support /has regen braking.

[@BillyNoMate]

I have a cheap ebike kit installed. I am thinking of upgrading the controller and maybe add a LCD display, there are so many out there, could you talk about all the features thats available in these controllers and LCD. what to choose and to avoid, power ratings, etc.

[@jhonny001]

Hi Micah, could you please recommend us a few controller models with regen fitted? In Aliexpress almost every model state regen braking but mine only have a few regen when I use the first 10% of throttle...

[@booobtooober]

May have raised as many questions as you answered. I'm in the market for my 1st ebike so I'm reading and watching lots of reviews/how to/informational videos. 1) In the vid you mentioned connecting regen wires to the e brake so does that mean you can coast without resistance if you don't apply the breaks? 2) True or false, I thought I seen a vid that said a direct drive hub motor will will always have rolling resistance whether its regen or not. 3) You mentioned how inefficient regen braking is which is what I suspected. So my thought is that with regen you cannot simply coast because as soon as you let off the throttle the motor is stopping you thus forcing inefficient jackrabbit stop and start driving as you would have to stay on the throttle until you wish to stop. 4) So my next thought is that coasting especially if you have a good coaster and decreasing rolling resistance with better bearings and high pressure tires will get me more mileage than regen ever could. Coasting more would also be less stressful on the motor and other components, all around less wear and tear.

[@arlenekufchock1394]

These are good questions and need to be answered, especially if the name of this channel is eBikeSchool.

[@dellaw53]

HI Micah was just wondering I have a rear 1000w hub motor 48v if I put a dynamo on my front wheel and connect it to the charge port of my e-battery will it trickle charge my e-bike as I ride.

[@jangofet555]

theres a controller with regen brake for a 500 watt motor on ebay thats says 25A and the lowest voltage its compatable with is 24v. does that mean it will generate 600 watts with enough weight down a hill. i was thinking of adding a ring flywheel to each side of each wheel for more weight and more rotational kentic energy to keep me going down a slight hill. if i need energy i can probably push my bike up a slight hill then regen down.

[@paratrooperchad]

I’m looking to add regen to my 1st upgrade and am adding to a 2007 Specialized Hardrock Pro which I added hydraulic disc brakes to when I added an all in one. I frequently pull a trailer with groceries laundry you name it up to almost 200 pounds. Never had a problem but I’d like some more stopping power. Not really interested in regaining any battery power that’s not important to me I’m more concerned about just that little boost of stopping it would give me is it going to be enough to notice? Or am I wasting my time building a new bike?

[@adventureswithsteve2981]

I have a Yuyang King YKZ7240HN , it has a 2 wire Low Voltage Brake connector and a 1 wire High Voltage Brake connector

[@pauldershem]

I would love to have an ebike with regenerative braking that activates when I back-pedal, just like on the Huffy I had as a kid; going downhill and slowing down could be all regen without engaging disc brakes. Grabbing a brake lever would engage the disc brakes AND regenerative braking.

[@PvtCollin3]

Good info, never heard of the torque arm before watching this video. I wonder if you will make a video series on converting motorcycles to electric ones.

[@ross-xv9si]

My rad bike has a lot of rear wheel resistance, like while going down a slope the bike is slowing when a normal bike would not, in fact maybe speed up. Extra effort to pedal too. Normal? Is the regen on while coasting? Can I adjust, or shut off regen totally?

[@romandise]

Hello, I think I have a good question... is it possible to add only electric brake without it being regenerative? I think so, it would have to be achieved in a diy plan, a way to connect the phases of the motor all together and at the same time that they are disconnected from the controller so as not to make a short circuit, because if you join the phases of the motor, it offers resistance or it brakes a lot even depends on the motor that it is, from my experience, the more amps the motor holds, the more it will brake, maybe connecting relays in parallel in each phase and then another relay that connects the 3 phases when pressing a momentary button, brake the engine and work, what do you think? Thank you

[@creativercutah4672]

Is regenerative braking hard on the motors though? If that motors go out on my scooter and I've wondered if it was due to regenerative braking and if I should just disable it and rely on the brake pads alone because of the expenses of a motor... Does it add more wear and tear on the motor?

[@Kurib0]

Nice Video Mike! I Learn everything by your Videos! Question: How can I measure AH of a DIY Battery Pack by cell, can you give us the Formula?

[@neutronpcxt372]

Divide the watt hours by the voltage, then by the number of cells in parallel. Ah= (Wh/Volts)/#parallel cells

[@Kurib0]

NeutronPCXT Thx Bro ✌️

[@edgefx1]

i have a question, have an xld brain power controller, im using it on a scooter that has no option for a physical brake, so i wanted to use the highbrake function as the primary means of stopping, my question is how do i wire it up? the low brake is connected to SL and Gnd, which i think mena stop low, the high brake should be SH, stop high, but i read that it needs to be pulled to system voltage instead of ground? does that mean 1 wire goes to p+ and the other goes to SH? and lastly can a hall sensor brake lever be used for the high brake?

[@AlexanderBarish1]

Can you explain why my geared ebike doesn’t slow down when the volts get close to 33 (cut off) but my direct drive does. Both are 10s8p but the geared one is a overvolted 24 volt original

[@bengrobben2582]

hello, i really like your videos. i have a e scooter with a 1500w motor 48v. when it breaks it makes up to 20a back in the battery witch has a 27ah capacity. is it not bad to charge it that fast? or does it not matter because its only a couple of seconds? thanks :-)

[@nitrodonkeygarage1115]

does the voilamart brushless hub motor have potential for regenerative breaking ?