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Joined 2 years ago
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Cake day: July 9th, 2023

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  • The problem is it’s very expensive. Solar installers charge tens of thousands of dollars and has a long history of scams. They take the place of the old trope about scammy used car salesmen. They’ve created leases and PPAs in an attempt to make the initial cost easier but only succeeded in being scammy

    It doesn’t help that we have tariffs and other barriers to low cost solar panel imports, yet insufficient support for domestic manufacturing to be competitive.

    The math is hard. Everyone wants to know the payback threshold from the huge install cost up front but it’s not straightforward.

    When I looked into solar I found

    • lots of scammers, poor service
    • I calculated a payback of 12 years from install cost given free energy, which is longer than I’m likely to own this house. But they claim 7?
    • I only have sufficient unshaded roof for half my usage
    • is it poor service or scamminess that it’s so difficult to get them to explain that?

  • A big part of it is being realistic about how often that would come up.

    Especially for those with their own house, charging overnight at home (like you do with your phone) is more convenient. It is so nice never having to go to a local gas station!

    Forget looking for discounts like Costco, charging from home is half (for me) the cost of gasoline. Everyone likes saving money

    The only time this doesn’t work is road trips, where I need to stop for 20 minutes every 4-5 hours of driving. If I’m eating a meal, it’s going to take longer than that anyway.

    So

    • 90+% of the time an EV is more convenient and much cheaper
    • on road trips where I would have stopped to eat, it’s equally convenient
    • on road trips where I’m stopping more than I would otherwise and for slightly longer ……. That’s actually very rare

    Edit: looking at my charging stats, it’s only been twice in the last year. One of those was a 1,200 mile road trip that did wonders to overcome my range anxiety


  • most Americans don’t want an EV with batteries at their current state.

    That’s a risky assumption given how driven by propaganda this is. The reality is current state of batteries is perfectly fine for most Americans. What if they realize that? It does partly depend on charger availability, which is being rapidly built out despite the efforts of the current administration to block that. What happens as Americans realize how many new chargers are near them?












  • Signing (intermediate) certs have been compromised before. That means a bad actor can issue fake certs that are validated up to your root ca certs

    While you can invalidate that signing cert, without useful and ubiquitous revocation lists, there’s nothing you can do to propagate that.

    A compromised signing certs, effectively means invalidating the ca cert, to limit the damage




  • Oh ok. I have no idea what the situation here is for bidirectional charging. It’s not common yet.

    And yes, we’re trying to work out common payment systems, but as far as I know, that’s just software. Historically chargers required you to register and pay through the manufacturers app, but that’s unscalable when you have many possible charger manufacturers supporting a common standard.

    One of the requirements for US incentives to build out chargers was mandating credit card readers so anyone can drive up and charge without a proprietary app. Of course that was cancelled in our chaotic political situation, so will take more years to happen


  • I believe EVs are being harmonized, although separately….or is that what you meant?

    Don’t EVs in EU have a standardized charger and negotiate voltage and current?

    In the US, we have an old standard that needs to go away, a newer standard that is going away, and Tesla’s standard which seems to be on the way to the winning standard. But the handshake is already compatible: switching between systems just requires a physical adapter. I believe the car and charger negotiate for the best voltage and current it can use

    And of course level I and II charging use residential electrical standards, so already must be as standard as you can get. No one wants to try resolving those