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Author Topic: Regen question  (Read 1119 times)

robbar1

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Regen question
« on: July 01, 2024, 09:26:45 PM »

On my SS9 I use regen OFF on highways and in the city i set it on Medium - just for the braking. IMHO The amount of energy the battery can get back is so small that its influence on coasting and smooth ride experience is not worth it.

Anyone else is riding the same way? Any thoughts?

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DonTom

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Re: Regen question
« Reply #1 on: July 01, 2024, 09:40:14 PM »

On my SS9 I use regen OFF on highways and in the city i set it on Medium - just for the braking. IMHO The amount of energy the battery can get back is so small that its influence on coasting and smooth ride experience is not worth it.

Anyone else is riding the same way? Any thoughts?
Keep in mind that you can have regen set to the very max and have none at all, or any amount of regen you want, by using the throttle. Just get used to never releasing the throttle unless you want to make a complete stop. The regen settings only limit you. You can always keep them at max and adjust your regen by the throttle. You will have to get used to it.


Just don't expect it to be like an ICE vehicle where it will coast well when you let go of the accelerator pedal.


-Don-  Reno, NV
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1971 BMW R75/5
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2013 Triumph Trophy SE
2016 Kawasaki Versys 650 LT
2017 Blk/Gold HD Road Glide Ultra
2017 Org Zero DS ZF 6.5/(now is 7.2)
2017 Red Zero SR ZF13 w/ Pwr Tank
2020 Energica EVA SS9
2023 Energica Experia LE
2023 Zero DSR/X

ms_smart

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Re: Regen question
« Reply #2 on: July 02, 2024, 05:29:09 PM »

I also have regen always at level 3. Works great for me. I also tend to disagree, that the value is limited. If you go downhill 1000m, I think you physically gain 1 kWh (depending on your weight). On my Experia this is roughly 5%. If I keep the throttle between coasting and full regen with no breaking I can gain ~2-3% SOC. Although this is difficult to calculate since the Energica only gives full SOC percentage the efficiency is still remarkable
« Last Edit: July 02, 2024, 05:36:25 PM by ms_smart »
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Stonewolf

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Re: Regen question
« Reply #3 on: July 02, 2024, 05:56:22 PM »

I just leave regen on max all the time and don't really understand the point of not doing so, if I need to do some boring hypermiling I just put it on cruise control.

I was taught to use engine braking as a big component of my speed control and find the idea of a bike that does nothing to slow itself on rolloff actually scary, even my 125 and my 600 I4 had something when you rolled off. Even the weaker regen at the top 5% is a form of reassuring control despite having to friction brake more at the same time. When I got onto my Ribelle I *loved* how strong the regen is at max, I ride on the throttle mostly and it feels so natural.
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joesedroid

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Re: Regen question
« Reply #4 on: July 02, 2024, 06:04:22 PM »

I too leave my regen on max 100% of the time. Really for 3 reasons, save on brakes, gain some power back and I do a lot of night riding with dear running in front of me. Instinctively Ill let off the throttle when I see one and that drops my speed extremely quick before I have a chance to hit the brakes. The only negative on high regen, and its kind of a big one, is when you disengage cruise control. Sometimes that scares the sht out of me.
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Stonewolf

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Re: Regen question
« Reply #5 on: July 02, 2024, 06:53:34 PM »

The only negative on high regen, and its kind of a big one, is when you disengage cruise control. Sometimes that scares the sht out of me.

Hah, yeah, I've gotten weirdly good at judging how much throttle to give it for a smooth switch off though.
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Specter

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Re: Regen question
« Reply #6 on: July 03, 2024, 12:33:00 AM »

I keep mine at max all the time and use the throttle to control my speed, only using brakes when I absolutely have to, or at the very final few feet of a stop so the bike is actually stationary stopped and not walking /creeping the last 10 feet of stopping.

At very best,the amount of power you will regain, is pretty much, what you put in at your last acceleration.   So on the highway when you are at a fairly steady speed, it won't do much for you but if you are in a bunch of stop and go traffic, THEN it can be a real help, because, instead of all those starts being burned up in the brakes, you are getting  some of them back,for the next go.

Learn how to throttle it for gentle, more, max, and don't just dump the throttle every time you have to slow down.  Slow even steady movements both on brakes and throttle make you a safer rider.  This goes for racing too.   trail braking into a corner at 135, coming down to about 90 before the lean in, using trail braking only, (ie your hard regen) it's an experience and a nice one too,  easy transition, good lean and you are always loaded up on the tires and as soon as you are pointing the right direction, ready to twist the throttle again.   Grabbing brakes, straightens you up, bye bye lean angle and turning / maneuverability.  It's helpful in shitty weather too, because pretty much ANY decent braking on the front tire, if that starts to slide, yah, buh bye.

Aaron
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robbar1

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Re: Regen question
« Reply #7 on: July 18, 2024, 12:49:54 PM »

I also have regen always at level 3. Works great for me. I also tend to disagree, that the value is limited. If you go downhill 1000m, I think you physically gain 1 kWh (depending on your weight). On my Experia this is roughly 5%. If I keep the throttle between coasting and full regen with no breaking I can gain ~2-3% SOC. Although this is difficult to calculate since the Energica only gives full SOC percentage the efficiency is still remarkable

You ever saw the SOC increase?? I never saw it increase even 1% . but I also never had 1 km downhill . i think 1km downhill on brakes will damage the brakes so with or without the SOC increase I would use the regen
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robbar1

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Re: Regen question
« Reply #8 on: July 18, 2024, 12:52:47 PM »

I keep mine at max all the time and use the throttle to control my speed, only using brakes when I absolutely have to, or at the very final few feet of a stop so the bike is actually stationary stopped and not walking /creeping the last 10 feet of stopping.

At very best,the amount of power you will regain, is pretty much, what you put in at your last acceleration.   So on the highway when you are at a fairly steady speed, it won't do much for you but if you are in a bunch of stop and go traffic, THEN it can be a real help, because, instead of all those starts being burned up in the brakes, you are getting  some of them back,for the next go.

Learn how to throttle it for gentle, more, max, and don't just dump the throttle every time you have to slow down.  Slow even steady movements both on brakes and throttle make you a safer rider.  This goes for racing too.   trail braking into a corner at 135, coming down to about 90 before the lean in, using trail braking only, (ie your hard regen) it's an experience and a nice one too,  easy transition, good lean and you are always loaded up on the tires and as soon as you are pointing the right direction, ready to twist the throttle again.   Grabbing brakes, straightens you up, bye bye lean angle and turning / maneuverability.  It's helpful in shitty weather too, because pretty much ANY decent braking on the front tire, if that starts to slide, yah, buh bye.

Aaron

i agree about the stop and go traffic - thats why in the city i turn it on . because moving between modes is so easy I do it all the time just 2 buttons to push and thats it .
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DonTom

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Re: Regen question
« Reply #9 on: July 19, 2024, 12:49:44 AM »

You ever saw the SOC increase?? I never saw it increase even 1% . but I also never had 1 km downhill . i think 1km downhill on brakes will damage the brakes so with or without the SOC increase I would use the regen
You're more likely to see it increase with the smaller battery.


I am riding my Zero DS out here with the smaller battery. I got a gain of 2 SOC when I came down from Mattole Road yesterday. Just above 2K (610M) elevation down to sea level.


-Don-  Avenue of the Giants, Humbolt Redwoods State Park, Redcrest, CA
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1971 BMW R75/5
1984 Yamaha Venture
2002 Suzuki DR200SE
2013 Triumph Trophy SE
2016 Kawasaki Versys 650 LT
2017 Blk/Gold HD Road Glide Ultra
2017 Org Zero DS ZF 6.5/(now is 7.2)
2017 Red Zero SR ZF13 w/ Pwr Tank
2020 Energica EVA SS9
2023 Energica Experia LE
2023 Zero DSR/X

jotjotde

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Re: Regen question
« Reply #10 on: July 19, 2024, 11:18:38 AM »

My 50ct: Using the regen at low after trying higher settings but did not like it. Not having a continuous racetrack training (like Aaron  8)), I cannot trust myself to not dump the throttle in a sudden tight situation e.g. while cornering which could make things even worse.

A quick calculation: At low regen setting you see -4 kW in the display when full regenerating. Assuming a net cap of 18 kWh of the battery that means you need to go nearly 8 minutes downhill throttle fully closed to gain 1 % SOC.

I agree with the TO, if you don't live in a mountain region, smooth riding saves more capacity than regen.
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Specter

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Re: Regen question
« Reply #11 on: July 19, 2024, 08:21:12 PM »

jojotide.

Race track training or not, you get into a fast OH SHIT situation, it's instinct more than training,  that self preservation thing kicks in and you find yourself grabbing for it out of, I need to STOP !!! being the first 'impulse' to register right before, I need to maneuver out of this.

Even though, if your ABS and TC are working properly (and are turned on) it's going to do everything it can to prevent you from getting into too horrible a situation.

Seeing a percent or two increase is pretty meaningless.  From a fairly decent discharge curve going on, to a fairly decent recharge curve going on. which could be even a moderate rate of speed / regen,  the terminal voltage can swing pretty significantly, and you can  slop a lot of surface voltage around going from one mode to the other.  Your SOC number I am pretty sure is voltage driven?  So yah you could push it a point or so and it means nothing really.

Recharge the bike at 2 amps, it says 86 percent soc, now stop / restart and recharge it at 60 amps, it may say 88 percent SOC on the battery during the charge cycle.  Your charge / discharge rate is throwing it off.

This is also another reason why, Hey !!  I charged it an hour ago and now it's down to 98 SOC, what broke?    NOTHING!!
The surface charge dissipated, the temperature went down on the pack, lowering terminal voltage,  the sun went down, it's now 86 degrees out .vs. 114 under the hot sun... etc etc.

aaron
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Dryer667

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Re: Regen question
« Reply #12 on: July 22, 2024, 05:29:29 AM »

I drop to low or no regen as well as Rain mode when doing long distances on the HWY. Makes adjusting the cruise control and if if kick off cruise for a slow car much smoother. Yes you can modulate with your wrist but on long trips its nice to not have to.

I use medium regen in the city. I only use high in stop and go traffic.
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