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  1. drutledge

    Hyperion 1420i balance readings off (?)

    I have a Hyperion 1420i that I bought last summer and have used almost exclusively as a bulk charger. I've never really used it to balance even though that's what you'd think I'd have it for. The cells have always been pretty balanced already (I think!). I use it only on a 12S2P (44V 10ah) pack...
  2. drutledge

    Chicago meet up

    I don't know if anyone is still following this thread but by next week it looks like this lingering low pressure will move out and actual early fall weather will finally be here; nice temps with sunshine. The forecast is still far out for Oct. 8th but it's looking much better than the last few...
  3. drutledge

    Chicago meet up

    I'm free both of those weekends.
  4. drutledge

    Chicago meet up

    I'm up for it, though it looks like a very good possibility of some sprinkles this Saturday. Most people might want to deal with the slight chill of a later weekend than the misery of getting wet if it actually rains. If we are set on Oak Park, we can meet at my place were I have a garage with...
  5. drutledge

    Adjusting King Power chargers

    A bit off subject but... I want to be able to easily vary the voltage of my 600W 10A BMS Battery Charger. I've located the pot that varies the voltage (a Baoter 3296 w 502) which means it's a 5K ohm pot (Correct?). Instead of having to open up the top and hope that I don't drop my tiny...
  6. drutledge

    Chicago meet up

    Most any date is fine with me. I'm also quite happy to host here in Oak Park if that's what seems to work best for everyone. Again, I'm also ok with just chatting with everyone if something in the city is better. The Cupcake is now street legal so anyone over 16 can take it for a spin on the...
  7. drutledge

    Chicago meet up

    Humbolt or Logan Square would be fine for the cargo bike's range but if people want to meet up somewhere else, I'd be happy to just to meet up (sans bike or cupcake) and look at other people's bikes and swap info. With a charge at the stop I could obviously go farther. I don't take the cupcake...
  8. drutledge

    Power Supply Q's for Hyperion 1420i Charger

    I power my Hyperion 1420 off of solar. It's completely 'emissions free' but makes no sense economically since the panels, storage batteries and controller cost about $600 total. At about 4 cents per full Lipo charge from the local electric company, it would take about 15,000 charges to break...
  9. drutledge

    12s2p High Side/Low Side + Different meter readings

    Alright, I'll test the voltages with a decent voltmeter and compare. I thought I saw a schematic here that showed which leads to use for each cell but now I can't find it. Any help here? If I'm going to compare the different meters I want to know that 'Cell 4' is these two leads and not some...
  10. drutledge

    12s2p High Side/Low Side + Different meter readings

    Ok. The Hyperion voltage gap indicator goes from green (less than .02) to yellow (.02-.03) then red over a .03 gap. Way over conservative? I normally will be recharging at about 50%. I don't see ever going below 20% without at least a partial recharge so I guess I really shouldn't worry. Any...
  11. drutledge

    12s2p High Side/Low Side + Different meter readings

    Short question(s): *When I switch the "High Side/Low side" balance connectors from my pack going into a Hyperion 1420 the balance readings go way out of whack. Why is this? or Should this happen? *Also, when reading the individual cell voltages with the Hyperion, or an HK-010 or HK Cell Meter...
  12. drutledge

    Just hooked up batteries and got a good spark

    Right I guess. I thought you were saying in your original post that you had a four battery pack that was both parallel and series AND that all four batteries balance leads were combined.
  13. drutledge

    Just hooked up batteries and got a good spark

    Ok well now I'm confused. It seems that 'karma' is saying it's possible, though it's hard to tell whether it's sarcastic or not. The image I posted is from the thread "Lipo Plug and Harness Service For Lipo Virgins", under Battery Technology, midway down the second page. I've also seen similar...
  14. drutledge

    Just hooked up batteries and got a good spark

    Ok. Bad idea. How is it possible then to have all the batteries in a 12s2p pack (made from 6s batteries) have the balance leads all paralleled using a 6 --> 1 harness (utilizing only 4 of the 6)? It seemed odd to me when I saw it in the "Lipo Plug and Harness Service For Lipo Virgins" post...
  15. drutledge

    Just hooked up batteries and got a good spark

    I just tried to hook up some newly shipped (from Hobby King) Zippy 6s 5000mah lipos in series using a series harness from EP Buddy. Both batteries were at about 53% as shipped and cells were balanced separately, then together before hooked up. The EP Buddy harness is pretty much idiot proof but...
  16. drutledge

    Newbie etrike questions

    I have cargo tadpole trike utilizing two front hub motors hooked up to two controllers, a single battery pack, one throttle and a single DP Cycle Analyst. The two motors do regenerative braking. It can pull slightly to one side or the other but nOthing too bad. This setup required some splicing...
  17. drutledge

    Need to limit 1000w system to 750w easily.

    I decided to take the new 700w controller (that didn't seem to be much different than the original 1000W one, in terms of performance) and opened it up. There were two shunts, instead of three as in the 1000w one. I cut one shunt out and tested it: 558 watts at peak 15.43 amps 13.7 mph A little...
  18. drutledge

    Need to limit 1000w system to 750w easily.

    Picture of the insides of my extra 1000w controller. Are L1 L2 and L3 the shunts? I have no idea of what/how controllers work. I'm still looking for some sort of 'noob' guide to controllers.
  19. drutledge

    Need to limit 1000w system to 750w easily.

    It is a brushed motor. I think I have a spare 1000W controller on hand; I'll open it up and see if I can locate the shunts. I'm trying to get an answer back from the Sec. of State testing facility as to how they determine a motor's power. If they somehow measure it at the wheels, it looks like...
  20. drutledge

    Need to limit 1000w system to 750w easily.

    For what it's worth, the Illinois law (where I am) is amended to match US Federal definitions of a 'low-speed electric bike": Defines a low-speed electric bicycle as a 2 or 3-wheeled device with fully operable pedals and an electric motor of less than 750 watts (one horsepower), whose maximum...
  21. drutledge

    Need to limit 1000w system to 750w easily.

    Ok so I got my cheap 700 watt controller from monsterscooterparts.com (rated 14 amps/36volts which seems more like 500watts but whatever) and attached it to my cupcake and took it for a test drive and... No difference. Speed, as measured by a bicycle computer, is exactly the same. At peak it...
  22. drutledge

    Need to limit 1000w system to 750w easily.

    Thanks guys. Just ordered a smaller controller to swap out for the 28 amp one. In answer to the other questions: -The cupcake only goes 16.5mph now, well under the 20mph limit on ebikes here. Has brake inhibit. -Don't have a matching helmet. -No idea how they measure the wattage, probably...
  23. drutledge

    Need to limit 1000w system to 750w easily.

    The trike is in a standard configuration, one front - two rear. It has a "Watts-Up" meter that peaks at about 1500 watts under full acceleration, fully laden with the 28 amp controller - which begs the question, how do they rate these motors/controllers? Not peak watts or amps obviously. Is it...
  24. drutledge

    Help Me build (build for me) a child carrier.

    I took a cargo bike and electrified it for my daughter and I. Goes great and she loves it! Safer than any other arrangement I've seen too as she's surrounded by steel and 1/2" plywood on 5 sides. Fur is completely optional.
  25. drutledge

    Need to limit 1000w system to 750w easily.

    I currently have a brushless motor rated for 1000w on a homebuilt tricycle. It has a controller rated for 28 amps and 3-22ah 12V batteries wired in series for 36V. Is my thinking correct that the easiest way to limit the output of this setup to 750 watts is to swap out the controller to...
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