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so there's this youtuber, and his whole schtick is "diy powerwall" where he gets used batteries for cheap and then tries to cobble them into useful systems https://www.youtube.com/user/jehugarcia/videos in the process of trial and error (and he clearly only barely knows what he's doing) he open sourced the design files for a PCB system, which he also sells pre-made: https://jag35.com/collections/all he does these live 2 hour youtube shows where people working in their battery project ask questions, almost like a chat version of a call in show. i'm not saying any of this is like, "good", but its filling a specific niche speaking of, there's also this guy who does very similar content: https://www.youtube.com/channel/UC5AcwWwviQIiEQAvN-0E2mg/videos
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Dec 17, 2019 04:39
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one thing i can never figure out about these EGO and Goal Zero products is how do you get it so that you can simultaneously be charging them with a solar panel *and* running some load off them. i have two big south facing windows in my office, and my "desktop" is an Intel NUC that works of a 19V DC power supply. I would love to put a 50W panel in each window, connect them to <THING> and then connect my nuc to <THING> and have it "just work". I'm assuming two 50W panels, behind glass, at a lovely angle, are going to produce something like 200Wh/day. Intel says this NUC will draw 15W at full workload, so i'm going to assume something like 20 hours a day of 5W and 5 hours a day of 15W, so ~175Wh/day. It should work. I just cant figure out what to buy. StabbinHobo fucked around with this message at 16:44 on Dec 17, 2019 |
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Dec 17, 2019 16:40
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yea get a module. building your own is a stupid amount of hand-work, and I wouldn't want to be flying around on faith in my soldering skills. even in a glider.
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Dec 22, 2019 15:34
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I dunno how much of a difference Yttrium makes, but my understanding was that LFP batteries, despite having better discharge and thermal properties, are simply non-starters due to their much lower energy density (Wh/kg) you could probably care less about that in a sailboat, but when it comes to flight 250Wh/kg is already baaaarely enough for experimental 2-seaters with a half hour of flight time. an LFP battery with half the energy (or twice the weight) would just not work. on a related note, check out this "refueling" video of siemens doing a battery pack swap on a test plane. pause and look closely at 1:04 https://www.youtube.com/watch?v=TcoTELN729M
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Dec 31, 2019 15:58
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