• partial_accumen@lemmy.world
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    6 days ago

    Home owned windmills are almost a total waste. Its surprising how little electricity they generate especially given how much the cost to buy and install. Some real numbers. A 400w can cost almost $18k to buy and install. A 410w solar solar panel is about $250 + $3k of supporting electronics and parts. And that same $3k can support 10+ more panels. I looked into it myself really wanted it to be worth it for home, but it just isn’t. Now utility grade wind? Absolutely worth it. You need absolutely giant windmills with massive towers, but once you have those, you can make a LOT of electricity very cost effectively.

    Solar panels worth it? Yes. Absolutely.

    Batteries, not quite there yet for most folks. Batteries are really expensive, and don’t hold very much electricity $10k-$15k can get you a few hours of light or moderate home use capacity. For folks with really expensive electricity rates or very unreliable power this can be worth it financially, but for most every else. Cheaper chemistry batteries are finally starting to be produced (Sodium Ion), but we’re right at the beginning of these and there not really any consumer products for home made from these yet.

    • DogWater@lemmy.world
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      6 days ago

      Yeah, right now end of life EV batteries are great for making your own power storage but that’s a level of diy beyond what 95% of people are willing or able to do

      What’s infuriating is that we had electric cars before ICE powered cars. 1899. If we would’ve been investing money and effort into research for battery technology since then, we wouldn’t have this problem. Salt batteries, solid state batteries, and other promising tech is in it’s infancy because we just started to take this seriously as a society like 10 years ago.

      Better late than never but it grinds my gears that the best argument against solar and wind is power storage requirements due to unpredictable power generation. Like this is an extremely solvable problem.

      • partial_accumen@lemmy.world
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        5 days ago

        Yeah, right now end of life EV batteries are great for making your own power storage but that’s a level of diy beyond what 95% of people are willing or able to do

        End of life EV batteries are great for grid-scale operators doing power storage, but I highly recommend against homeowners use them this way. Not just because they are complex DIY projects as you point out, but because the EV batteries that are aging out of car use are NMC chemistry. These are great for high density power storage, which you want in a car, but they are susceptible to thermal runaway if they get too hot. The original Tesla Powerwall and Powerwall 2 also used these same chemistry batteries. I wouldn’t want these in my house. However, in a utility grid scale? Sure, they won’t be anywhere near people so in the unlikely event they do catch fire its a property problem, not a lost human life problem.

        • DogWater@lemmy.world
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          5 days ago

          I understand your concern, I totally agree that the volatility isn’t ideal, but putting it in a steel box outside your house isn’t that beyond the scope for a diy-er. Envision it the same way a generac sits outside and ties in to your house but with a safe enough enclosure.

          As long as you check the cells you use when you deconstruct the car battery it should be fine. All the projects I watch online they don’t even need the liquid cooling system that it utilized when it was in the car because the discharge rate is so far below the C rating the battery that they don’t generate great like when they are in cars

          I understand that cell could go bad though at any time, so the box is necessary imo

    • JustEnoughDucks@feddit.nl
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      4 days ago

      Sodium ion batteries are going to be the solution. 18650 packs are already out and perform economically. Since the molecules are so much bigger, energy density is only like 60% of lithium based solutions, but they have a very wide temperature range and are incredibly more inert and safe and density isn’t a problem for bulk energy storage.

      The hurdle to overcome in inverters dealing with the very wide voltage span and bespoke charging ICs, but definitely possible and within 5 years will probably become a lithium iron phosphate competitor.

      • partial_accumen@lemmy.world
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        6 days ago

        Ahh I get it now. You have no idea what you’re talking about. You have the smallest understanding of something and assume that is everything. You’re so very far away from understanding the practical applications and limits. You’re also clearly not interested in learning, so I’ll leave you to your impractical delusions.

      • Shardikprime@lemmy.world
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        6 days ago

        Wait so the same people that can’t drop 500 USD for an emergency are expected to drop 300 USD for a wind turbine and provide the installation of it to boot is that right