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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Brendan G Bohannon‏ @cr88192 16 Jul 2016

      idle: for dealing with blackouts, sometimes it would be nice if we had, say, a 24 kWh battery pack. then power through most blackouts...

      3 replies 0 retweets 0 likes
    2. Rich Felker‏ @RichFelker 16 Jul 2016
      Replying to @cr88192

      If you have that kind of battery capacity who needs grid/blackouts? Just charge it off solar.

      1 reply 0 retweets 0 likes
    3. Brendan G Bohannon‏ @cr88192 16 Jul 2016
      Replying to @RichFelker

      yes, solar could also work. would need to look into the cost and power output of PV panels and similar...

      1 reply 0 retweets 0 likes
    4. Rich Felker‏ @RichFelker 16 Jul 2016
      Replying to @cr88192

      I suspect the panels will be dirt cheap compared to those batteries.

      1 reply 0 retweets 0 likes
    5. Brendan G Bohannon‏ @cr88192 16 Jul 2016
      Replying to @RichFelker

      possibly. quick check, rooftop PV panels seem to go for about $300 to $450 each. seems $1k would give ~ 1kW worth of panels.

      1 reply 0 retweets 0 likes
    6. Brendan G Bohannon‏ @cr88192 16 Jul 2016
      Replying to @cr88192 @RichFelker

      my looking implies it may be possible to build a 24 kWh bank for about $3-5k if buying cheap cells in bulk off of Alibaba.

      1 reply 0 retweets 0 likes
    7. Rich Felker‏ @RichFelker 16 Jul 2016
      Replying to @cr88192

      Confused... are you measuring panels in kWh not kW? And why would you need 24 kW or kWh?

      1 reply 0 retweets 0 likes
    8. Brendan G Bohannon‏ @cr88192 16 Jul 2016
      Replying to @RichFelker

      panels are in kW, batteries in kWh. would need probably ~3-4 kW worth of panels for a house... (looking, meant NiMH cells).

      1 reply 0 retweets 0 likes
    9. Brendan G Bohannon‏ @cr88192 16 Jul 2016
      Replying to @cr88192 @RichFelker

      this means, for similar power output, the PV panels and batteries would be fairly comparable cost-wise, assuming cheap batteries

      1 reply 0 retweets 0 likes
    10. Brendan G Bohannon‏ @cr88192 16 Jul 2016
      Replying to @cr88192 @RichFelker

      buying from US sellers, or lead-acid batteries, would make the cost of the battery bank pretty excessive though (~ $20k).

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 16 Jul 2016
      Replying to @cr88192

      Lead-acid batteries seem seriously overpriced vs cost of raw materials and how low-tech they are.

      2:54 PM - 16 Jul 2016
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Brendan G Bohannon‏ @cr88192 16 Jul 2016
          Replying to @RichFelker

          yep, pretty much. the larger 18/20Ah UPS batteries seem best here for Wh/$, but still not really "good" here vs NiMH or LiON.

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 16 Jul 2016
          Replying to @cr88192

          Really? I thought UPS batts (usually SLA) were all way overpriced & large truck/SUV/boat batts were a better deal.

          1 reply 0 retweets 0 likes
        4. Brendan G Bohannon‏ @cr88192 16 Jul 2016
          Replying to @RichFelker

          I am finding small UPS batts (7-9 Ah) for ~$20-$30, and larger 20Ah for ~ $40. 80Ah marine batts usually seen around $200.

          2 replies 0 retweets 0 likes
        5. Brendan G Bohannon‏ @cr88192 16 Jul 2016
          Replying to @cr88192 @RichFelker

          granted, it all seems pretty variable, so dunno. for NiMH and 18650 was looking on Alibaba, but prices vary widely.

          1 reply 0 retweets 0 likes
        6. Brendan G Bohannon‏ @cr88192 16 Jul 2016
          Replying to @cr88192 @RichFelker

          though, looking, finding similar lead-acid batteries listed for a lot cheaper on Alibaba as well, so dunno...

          0 replies 0 retweets 0 likes
        7. End of conversation

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