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Joined 2 years ago
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Cake day: June 17th, 2023

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  • Inverters and solar battery storage generally have some combination of wired and wireless communication. You need to communicate with the grid for real-time pricing and forecasts so the system knows when to charge and discharge. Also you want the system status of all the panels and batteries. If somebody slices through the wrong fiber line near your site, it’s important to still be able to get that information.

    If you get a home PV system, they’ll often have the option of a cellular modem. The controller on my home system has Wi-Fi and Ethernet with the option of a cellular modem. It wouldn’t surprise me if the board comes populated with some of the components necessary for cellular functionality even if you don’t opt for it.

    I’m just saying they need to divulge more details before one can conclude this is nefarious.


  • Over the past nine months, undocumented communication devices, including cellular radios, have also been found in some batteries from multiple Chinese suppliers, one of them said.

    The two people declined to name the Chinese manufacturers of the inverters and batteries with extra communication devices, nor say how many they had found in total.

    They’re very light on details. Sometimes it’s cheaper to make one PCB in huge numbers and only enable the cellular modem on the higher priced models or when a subscription fee is paid. Their mere existence without any additional information shouldn’t be particularly alarming.





  • I don’t keep my phone on me for large parts of the day. The AW has just enough connectivity to get me the information I need without being a distraction. I’ve found it motivates me to do gardening, landscaping, etc. because I can track that as a workout. The weather alerts are also nice for that since it lets you know a few minutes before it starts/stops raining.

    Mine is 7 years old now and the battery still lasts all day so I feel no need to replace it. I wonder if device longevity combined with lack of meaningful improvements might be slowing sales. They seem like the sort of device you wear until it stops working for a full day or you break it.


  • If you really want to make a successful utilitarian line of EV trucks you need a DC V2L standard capable of delivering 10 kW or more. Maybe something like USB-C PD with communication lines reduced in number and the power wires bumped up to 10 or 8 gauge wire. That would enable you to make BLDC-powered truck accessories that perform better and are cheaper than gas-powered alternatives.

    For example, a BLDC powered wood chipper with a 5 kW motor could chip branches up to 5” or 6” and, due to the nearly flat torque curve, it wouldn’t stall out and need to be unclogged like a gas-powered version. Log-splitters, post-hole diggers, saw-mills, etc. that are powered by small gas engines would all be vastly inferior to their EV-powered BLDC counterparts - both in price and performance.







  • The photo the DPRK released showed a fairly small drone with a triangular shape. It doesn’t look sufficiently large to fly all the way from the ROK to Pyongyang, drop some leaflets and return to the south, meaning they should have been able to recover the crashed drone. Also, if it were a civilian group, they usually take credit for the balloons they send and none have said anything about sending a drone to the north. It really seems like something might be going on internally and the DPRK is trying to blame whatever is happening on outside agitation.