serious_sam
10 kW
Can you link to the chevybolt.org thread please?Warren said:Thanks.
Can you link to the chevybolt.org thread please?Warren said:Thanks.
serious_sam said:Can you link to the chevybolt.org thread please?
Jil said:My 2 cents :
I have ridden my GMAC in the Pyrénées mountains a few days ago.
Battery output limited to 300 watts, loop of 26 km & 1040 m D+, many parts above 10% inclination.
I have consumed 6.65 Ah (360 Wh) to go up, and going down I got back 2.35 Ah with regen, i.e. 35% of the energy spent to climb.
Yes, and then you don't need a battery anymoreE-HP said:It seems like if you could climb the hills without the motor, then you could get to infinite percent regen?
Jil said:Question : from your experience, considering only geared motors, does it worth it to have regen when travelling on an ebike, or a motor with inner freewheel is preferable ?
I'm talking about GMAC vs Shengyi SX2 (or equivalent).
On hilly areas, my recent experience tends to confirm that yes, regen is a big plus to save your brake pads and optimize your range.
And the electronic freewheel on my GMAC consumes around 20 watts only, which means that in case I run out of battery when travelling (let's say when I have only 50-100 Wh left), I can just turn of the assistance and use only the electronic freewheel for the next 50 km or so to avoid all inconveniences due to the drag.
In my case, I found that 10-12A (i.e 5-600 watts) of regen were an minimum to slow down enough the bike. On very steep descent, 15A would even be better (but I'm limited by my battery).E-HP said:For me, 270 watts or so of regen is the optimum level for energy recovery, given my bike, motor, controller, weight and terrain. Any more than that, and the bike won't maintain the speed necessary to recover energy. Pedaling uphill is the key.
Pedaling is the key indeed to optimize the range. During this 26 km/1040 m D+ trip, as per the CA, I have used the same amount of human energy (350 Wh) than electrical (360 Wh).E-HP said:When I go for a longer ride, I expend most of my own energy up front, climbing about 800 feet to the top of the ridge, with a decent amount of pedaling. Works out, since I'm still fresh.
Jil said:In my case, I found that 10-12A of regen were an minimum (i.e 5-600 watts) to slow down enough the bike. On very steep descent, 15A could even be better (but I'm limited by my battery).E-HP said:For me, 270 watts or so of regen is the optimum level for energy recovery, given my bike, motor, controller, weight and terrain. Any more than that, and the bike won't maintain the speed necessary to recover energy. Pedaling uphill is the key.
Toorbough ULL-Zeveigh said:Justin Grin wayvin his middle fingers @chalo
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E-HP said:I just realized that I'm coming up on 4k miles on the original pads that came with the BB7 brakes. I barely even touch my brake levers since I use my throttle with slide regen, which takes me down to around 6 mph, and going down a 15% hill, I can keep the bike at a comfortable 20mph or so, instead of coasting down at 35+mph. I have my regen set up for energy recovery, but still helps a lot with the braking. :thumb:
calab said:What controller you using?
E-HP said:Power Velocity 18 FET, but a lot of controller support variable regen.
xmtx said:I'm looking for a low power (I intend to use it around 300W), regen capable controller.
As it's for a not tech savy person, the phaserunner are a complete overkill (in price and in functionnality) for this task.
Do you know anything cheaper than that?
Chalo said:KT controllers support regenerative braking (settable to different levels, but not proportional) if you use a compatible display. You can also turn down their maximum current in steps to cut their rated power by up to 50 percent.
I can't attest to how their regenerative braking performs, because I haven't used that feature yet.
A low powered KT controller plus an LCD4 display will cost you maybe $70 combined if you shop around on eBay.
calab said:PSW Power sells those display kt controllers.
https://www.pswpower.com/
I never seen any powerful kt's, I went looking one time for 2-3kw of power, nothing but crickets.
The problem is with those kt display units controllers is when you get an error code, try to fix it and cant. So come to a place like this, but I often wonder about all the kt problems error codes that have been posted, how many rolled their ebike deep into the back of shed, with perhaps even 0v, who knows, maybe they went on to a Jetson by Costco, or went entry level with a Bafanged Townie or they went all out with a $4k+ Trek that they lock up with a cable lock.