Recent content by howardrya

  1. howardrya

    The Powershed

    The supply of packs has slowed down around the holidays, so I've been occupying myself with some other stuff. I did some testing with my imaxb6 mini and generated these discharge curves. The data was logged with "DataExplorer"http://www.nongnu.org/dataexplorer/which is a really cool program to...
  2. howardrya

    The Powershed

    Exactly, I have a battery temperature probe on the pack through the epever controller, so I always know what the cell temps are. I haven't seen it lower than 32F.
  3. howardrya

    The Powershed

    The low temps haven't been a problem so far and we've had temps down to 20F or -7C. I've seen typical drain and capacity under those conditions. I believe you that it will be a more of a problem when temps get down to -15C ish. I'm open to suggestions, but there isn't much I can do. If it...
  4. howardrya

    The Powershed

    So after the festivities of Thanksgiving yesterday I finished soldering all my packs. I've got the 260w weller solder gun and that thing stinks. I do not recommend. The trigger switch lit on fire when I was using it, so I had to jurry rig it to work. I went through 8 of their tips making these...
  5. howardrya

    The Powershed

    I'm very excited to share my project and document my progress. Anyway, I got involved with 18650's when I spec'dthem for use in my Startup's line of IoT devices. I bought a few genuine ones, then when I need to source a large quantity, I reached out to a local computer recycler. We've reached an...
  6. howardrya

    Chickeys solar playhouse. (With Mini DIY powerwall)

    Chickey, how is the raspi connected to the unit? Using the epever rj-45 to usb connector? It looks like you've got some wireless device (like an esp8266) to relay the data. Is there a write-up for that somewhere?
  7. howardrya

    US-MD Tested Cells and Unopened Packs

    Price would probably be anywhere from $0.80 to $1.25 per cell depending on capacity and quantity. $2.50 per 6 cell laptop pack. Make an offer though.
  8. howardrya

    The what information do you keep regarding your cell harvest

    Bubba - I'd also love to see how you made that input prompt in excel.
  9. howardrya

    US-MD Tested Cells and Unopened Packs

    Selling lots of genuine tested 18650 batteries. LG, Panasonic, Samsung, Sanyo, pulled from laptop batteries. I can provide as many as you need of varying capacities. All were tested with opus chargers. I also have lots of unopened laptop packs too. I can provide stats to estimate the quality of...
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