5 ms·

Sailors are big into LFPs these days. I just upgraded my Beneteau to a 11kWh LFP bank and it's been game changing. I cook with a 1800W inductive cooktop, use th

Sailors are big into LFPs these days. I just upgraded my Beneteau to a 11kWh LFP bank and it's been game changing. I cook with a 1800W inductive cooktop, use the microwave, run the desalinator, for multiple consecutive days at anchor without running a generator or the motor. Unthinkable in the days of AGM deep cycles, they'd be dead in months.

Scoundreller 3y ago
get an instapot! Save lots of energy while cooking faster. (depends on what you're cooking of course).
- fgsfds028374 3y ago
  Already got one (3qt), love it.
kragen 3y ago
how long will the lfps last that way
- elihu 3y ago
  In theory they should be good for several thousand cycles, so -- a long time. As long as you don't overcharge them, drain them too low, or try to charge them in below freezing temperatures. Also, they say that usually LFPs will last a bit longer if they're installed such that they're under a bit of sideways compression. I don't know why that is.
  - jacquesm 3y ago
    That only goes for prismatic cells (boxes rather than cylinders). The reason is that they tend to swell up while charging if you don't compress them so manufacturers will specify a clamping force required for the cells to keep their shape. If they change shape in such a way that you can observe it then your cells are toast so better stick to that mfg indicated compression. There are a number of articles out there that show how to do this the right way and also some that get it hilariously wrong. The direction to compress the cells in is in such a way that the electrodes remain under compression perpendicular to their surface. So compressing from the top and compressing from the front will do absolutely nothing.
    - kragen 3y ago
      thank you very much for explaining it makes sense that cylinders would be immune to swelling
      - jacquesm 3y ago
        You're welcome. I've been working for more than a year on a blog post about the various safety aspects of building battery packs but it's a never ending rabbithole of stuff to research and learn about so I haven't gotten around to publishing it.
        ilyt 3y ago
        Maybe multi-part series would fit it better ? Probably better SEO for one-subtopic-per-article if you care about that.
        jacquesm 3y ago
        No, I don't care about SEO at all. I just would like this info to be out there for hobbyists and tinkerers as well as people that are contemplating designing something with Lithium Ion based batteries in it. But because it is safety related I really want to get it all right and with little room for error I get a lot more careful about what I publish. It will happen.
        lttlrck 3y ago
        That's very understandable and I can't wait to read it once it's ready :-) Not sure why, but when I saw your name in this thread - it was entirely expected ¯\_(ツ)_/¯
        jacquesm 3y ago
        No idea either... it's jm bait ;)
        T3OU-736 3y ago
mikae1 3y ago
Also: https://100r.co/site/solar_cooking.html https://100r.co/site/solar_cooking.html

Scoundreller 3y ago

get an instapot! Save lots of energy while cooking faster. (depends on what you're cooking of course).

fgsfds028374 3y ago
Already got one (3qt), love it.

kragen 3y ago

how long will the lfps last that way

elihu 3y ago
In theory they should be good for several thousand cycles, so -- a long time. As long as you don't overcharge them, drain them too low, or try to charge them in below freezing temperatures. Also, they say that usually LFPs will last a bit longer if they're installed such that they're under a bit of sideways compression. I don't know why that is.
- jacquesm 3y ago
  That only goes for prismatic cells (boxes rather than cylinders). The reason is that they tend to swell up while charging if you don't compress them so manufacturers will specify a clamping force required for the cells to keep their shape. If they change shape in such a way that you can observe it then your cells are toast so better stick to that mfg indicated compression. There are a number of articles out there that show how to do this the right way and also some that get it hilariously wrong. The direction to compress the cells in is in such a way that the electrodes remain under compression perpendicular to their surface. So compressing from the top and compressing from the front will do absolutely nothing.
  - kragen 3y ago
    thank you very much for explaining it makes sense that cylinders would be immune to swelling
    - jacquesm 3y ago
      You're welcome. I've been working for more than a year on a blog post about the various safety aspects of building battery packs but it's a never ending rabbithole of stuff to research and learn about so I haven't gotten around to publishing it.
      - ilyt 3y ago
        Maybe multi-part series would fit it better ? Probably better SEO for one-subtopic-per-article if you care about that.
        jacquesm 3y ago
        No, I don't care about SEO at all. I just would like this info to be out there for hobbyists and tinkerers as well as people that are contemplating designing something with Lithium Ion based batteries in it. But because it is safety related I really want to get it all right and with little room for error I get a lot more careful about what I publish. It will happen.
        lttlrck 3y ago
        That's very understandable and I can't wait to read it once it's ready :-) Not sure why, but when I saw your name in this thread - it was entirely expected ¯\_(ツ)_/¯
        jacquesm 3y ago
        No idea either... it's jm bait ;)
      - T3OU-736 3y ago

mikae1 3y ago

Also: https://100r.co/site/solar_cooking.html https://100r.co/site/solar_cooking.html