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    Waking up CALB SE LiFePO4 after years in storage

    Thanks for your input. I will check the cells as I have time. I don't know if the all-in-1S method is terribly practical with my cells all in a unique geometrical arrangement to fit the bike, but I suppose I can if I need to. I am thinking of adding the spare 25th cell that came with the bike...
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    Waking up CALB SE LiFePO4 after years in storage

    Thanks for your response. I have it on a 12A charge now and I'll check the cells when it's nearer to full so make sure I don't have imbalance that could put some cells over the maximum safe limit, and again after it rests. I like to keep cell voltages in a spreadsheet, conditional formatting...
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    Waking up CALB SE LiFePO4 after years in storage

    Hello all, I bought a partly finished electric motorcycle for my second project. It has 24 CALB SE cells. It was in storage a long time before I bought it. After I bought it, life got in the way and I didn't do anything with it for 2.5 years- except take a test ride around the block and find out...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    It was working the last time I checked, but I don't have it in use so this post was probably the last time I took it off the shelf. Still no idea why the DC would have done anything- if it did and it wasn't just random. I've been thinking of trying this PSU off of 360VDC from my Chevy Volt, I'll...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    OK, news from my DC input experiment: The PSU does not function on 220VDC input. However, interestingly, it started to function on AC just fine after I tried it on DC! I didn't try it on AC today before I tried DC- I should have. I'm happy it's working now, and I hope it turns out to be...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    If I ever get mine going, my thought is to have it onboard as a mountable module in the same place that an exhaust pipe would go- my Native even has the exhaust bracket still on, so that's an easy mounting point. Maybe I'd put it inside a pipe or something to keep it dry in case I got caught in...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    I am not qualified to help with any of that, but I lend you my moral support! I am excited to see more activity on this thread. Still hoping my curiously-dead/not-dead ESP120 can be made useful again.
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    Glad to see some new activity on these units. Still nobody has ideas about the problem of the supplies simply failing to come on after attaching output cables? A few people have had this issue.
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    Well, with the help of three long, skinny extension cords and an alternate 240v load, I got the input voltage down to 238v, and observed no change in the situation. Nuts. Any new ideas? Edit: Did an Rshunt adjustment on my normal charger, got it making 2.6kW. This drew the source down to 226v...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    OK, I have a theory as to why mine won't work: The power supply is rated for 200-240v AC input voltage. It's probably expected to be used in 208v applications most of the time. When I measured just now (late at night), the input voltage I am giving it is 248v. Perhaps it is shutting down output...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    That would be super neat, but I am not a competitor. I will only be doing the first half of the course. My bike has no aeromods and is 5.5kWh, so I can't finish the whole course with the pack. I have been enjoying seeing what the supercharger can do for Benswing, though!
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    I am having the same trouble as Kin and Artur- my ESP-120 does not give DC output. It did when I first tested it, no problem. However, after I soldered some wires onto the output terminals, I get nothing. Just 3mV. I followed JoeG's advice to remove the output board and inspect for any heat...
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    4kW HV Meanwell + server PSU charger

    Howdy folks, I was going to reply to this thread where this subject is discussed, but decided not to necro it and derail it from the OP's build, and thought ES would be a better forum for this discussion. I would like to double my electric motorcycle's charging speed. I have a 22s Leaf cell...
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    ESP-120 DC input

    That gives me some confidence, thanks. Any suggestions for a fuse good 250VDC in an easily used package?
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    ESP-120 DC input

    I would like to run my ESP-120 directly from the hybrid battery of my Prius, which is 200-250vdc. My Meanwell RSPs will run on DC, my Sony APS-162s are supposed to in some specs, but I don't know about these. I have not found an official spec sheet anywhere. Anyone know if these would be happy...
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    HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

    It looks like these have a pretty great ability to adjust voltage if I am reading correctly- is it true that one can get as low as 24v by applying positive voltage to the solder pad of the removed trim pot? How low can the voltage be set with the stock trim pot? Does the adjustment voltage need...
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    Help- ebike started acting strange

    I tried the test, looks like I've got some blown MOSFETs. That's pretty lame. I don't know how they could have gone bad with the bike just sitting there. Maybe I killed them on the last little climb into the garage and didn't notice. So strange. I bought this kit to be a relatively trouble-free...
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    Help- ebike started acting strange

    That page looks great! I will try the tests on it after I finish up making some Christmas gifts.
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    Help- ebike started acting strange

    No hall sensors on this motor. I don't feel any significant resistance when turning the motor either forwards or backwards.
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    Help- ebike started acting strange

    Thanks for the response. My motor has only three large wires. No sensors, apparently. I did check the connection from the controller to the motor, it seemed tight. How can I check the motor wire continuity?
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    Help- ebike started acting strange

    Bad connection where? Between the controller and the motor? I didn't hold the throttle down for long stretches of time, seconds only. You really think that'd have blown it?
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    Help- ebike started acting strange

    Voltage is 39.4v OC, 37.1 minimum during the ~2-4 seconds the motor tries to hold position.
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    Help- ebike started acting strange

    Hello all, I recently decided to put my PMDC motor build plans on hold and get a cheap hub motor kit just to have something to ride until I have time for that. I picked up an Aotema hub motor with a no-name controller and 3 SLAs as a kit, used. It worked when I demo'd it, it worked when I tried...
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    Why am I killing hall effect throttles?

    The controller takes a 2-wire input, does not supply 5v, and is programmable to use any of about ten different input possibilities. When I tested the voltage sweep of the hall when disconnected from the controller, I got about 0.88v-4.55v. I don't know the input resistance of the controller...
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    Why am I killing hall effect throttles?

    I'm using a 5v USB charger that puts out a nice, steady 4.95-5.05v. Do I need a series resistor or something? The controller is an Alltrax AXE 7234.
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