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  1. J

    charging LiFePo4 with solar cells

    Warren, There are a number of inexpensive 24V charge controllers on the market. Here are a couple links. http://www.virtualvillage.com/6a-12v-24v-solar-panel-charge-regulator-controller-007808-026.html?utm_source=googlebase&utm_medium=shcomp...
  2. J

    The care and feeding of a123-based packs...

    Hey Gary, Have you tried McMaster-Carr for the heat shrink? They seem to have a good selection. JJ
  3. J

    LifePO4 12v20A - What do you think about these?

    Don't know if these are the actual units, but there are some very large batteries being tested in a few municipalities for peak loading scenarios. You know, summertime, 3000 degrees, all the air conditioners west of the Mississippi running. JJ
  4. J

    Ah or Wh

    I also use WHrs for energy description...but the AmpHour rating is much better for charge/discharge characteristics. JJ
  5. J

    Magic DeWalt BMS changing delivered voltage?

    I ran across this info a while back. Might be what you're looking for....just not cheap. "So, if you wanted to use unmodified DeWalt/A123 batteries with their original charger, you could purchase part #636747-00 (wiring harness, $39.90) and part #630141-00 (tool casing with battery latch...
  6. J

    A Technical Question

    To Olivier, While I agree that PML's numbers seem unrealistic, there are at least a couple of other companies attempting to use their motors. See these links... http://www.lightningcarcompany.com/ http://www.zapworld.com/electric-vehicles I was looking into the motors for an electric...
  7. J

    FYI: EV-Ranger on ebay - not a conversion.

    I think Ford limited it to 75mph. Probably has a Siemens motor in it. As I recall, around a 300V system. JJ
  8. J

    ----- All Answer about the Dewalt 36V battery and B M S ---

    Dean, Also realize that you never truly have 72V with these packs in series. Almost immediately after you place any load on them, the voltage drops to about 66V. When I run my fairly heavy 2-pac bike, even at five amps my sag is down to 62-63 volts. With more in parallel you won't sag nearly as...
  9. J

    ----- All Answer about the Dewalt 36V battery and B M S ---

    I leave my batteries charging for as long as possible which is usually no more than four hours each during the day. Ride to work. Charge battery A til noon. Charge battery B til four. Ride home. Charge battery A 2 to 3 hrs. Charge battery B overnight. Rotate A and B every couple weeks. I have a...
  10. J

    ----- All Answer about the Dewalt 36V battery and B M S ---

    Ok, way to start the week. Rained on me this morning(slight, but none was in the forecast). Picked up a nice sliver of metal on the way home. Didn't go flat til I pulled the metal out(at home). GG: Like your packs. I had an occasional problem with one cell getting out of range also. I just...
  11. J

    ----- All Answer about the Dewalt 36V battery and B M S ---

    Hi Doc, Thanks for the welcome. Let's see if I can answer some of your questions. 1. One is passing thru a 15A fuse and the next one have NO fuse.. but it is controlled with a 60A mosfet. in your case, you seems to directly use the NEG connector that pass thru the 15A fuse right? I am using...
  12. J

    ----- All Answer about the Dewalt 36V battery and B M S ---

    Hi folks, This is my first post. Been reading the site off and on for a while now and figured I'd throw in a couple cents. I built my 72(66)V pack about a year ago. Running a Crystalyte 5305 with a 20A controller. Purposely limited the controller ouput. So I ran two packs for about 8 months...
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