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Cake day: June 15th, 2023

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  • At the same time I’ve never had a flashdrive fail due to temperature or water. I used to do printer repair for a fairly large company and on the printers I worked on firmware was loaded just by plugging a flashdrive into the usb port on the printer. I always had a pocket full of flashdrives because of that. Over the years I’ve probably forgotten at least a dozen flashdrives in my pocket when I washed my pants and at least half of those wound up going through the dryer too. They were all still completely functional afterwords. I also live in MN so I’ve left them in my vehicle when it’s -17F outside and had no issues.

    The only things I’ve ever actually seen kill a flashdrive are major physical damage like you said, or just general wear from plugging them in and unplugging them too much. Technically I guess I also killed one by messing up a format badly enough but that’s a whole other issue. As far as physical durability goes the full metal body Kingston Data Traveler drives have always been durable enough that I could just shove them in my pocket and not worry about them. I’m sure there are others like those but those are just what my workplace bought in bulk so they are what I typically used.



  • You are right on the efficiency but as others have said working with DC voltages that high is dangerous. That many batteries in series would also be hell to monitor so you are one bad cell away from burning down your house. Generally when working with DC you want to keep it under 50V to avoid electric shock risk.

    For powering a home multiple 48V arrays in parallel is the best bet. You can easily find inverters for that voltage and just bumping the voltage up to 48V avoids a ton of losses without risking electeocution or making the system overly complex. 60V and 72V inverters are also readily available but that’s just risking electrocution for minimal additional benefit. You would also want to be using lithium iron phosphate batteries (LiFePo4) instead of regular lithium-ion batteries. They aren’t quite as energy dense as most lithium-ion chemistries but they are much more safe, much less picky about charging characteristics, and much more long lived. You can get them in 12V cells just like lead acid batteries because they are frequently used to replace lead acid batteries in stationary power storage applications. Depending on the cells you get they can be a pretty much a better drop in replacement for lead acid batteries however it is normally still a good idea to get chargers and inverters designed for them to get the most out of them. That’s because they store much more power than lead acid batteries and unlike lead acid batteries they can be charged just as quickly as they can be discharged.

    Source: I did portable inverter setups for a few years.