Resonosity
@Resonosity@lemmy.dbzer0.com
- Comment on Easy-to-use solar panels are coming, but utilities are trying to delay them 1 week ago:
Many inverters aren’t even UL listed.
Yes but many inspectors and insurance companies won’t want you to install electrical equipment on “real property” or buildings if it isn’t UL as that falls into the scope of AHJs and insurance providers. If there’s something that has the potential to start a fire, you need to have safety certifications so operating the system not only reduces the risk of fire, but also selling the house in the future to a new owner doesn’t come with excess burden on behalf of the next insurer.
If your solar system is off-grid AND off-building, I see no reason that you need to have a UL listed system.
This is of course dependent on local AHJs and utilities, but UL 1741 covers both standalone (off-grid) and grid-interactive (on-grid) inverters. If you’re choosing an inverter manufacturer that makes non-UL listed off-grid inverters, I would probably be suspect of their products’ quality as it’s easier to gain UL listing regardless of how the inverter is used: off-grid or grid-interactive.
That’s the problem.
That is a problem. Off-grid inverters that aren’t certified to UL 1741-SB aren’t required to have anti-islanding protection that cuts the inverters off if there’s an absence of grid voltage. If a “balcony solar” inverter were to NOT cease to energize upon loss of grid and stay islanded, then voltage is introduced to the building’s/community’s shared local distribution system. If work were to be done on that portion of the distribution system or grid where lineman and wireman expect conductors to be de-energized, then you might have injuries as a result. Now, you may be able to say that lineman and wireman should always test for presence of voltage prior to doing work, and as a solar engineer I would absolutely expect folks to do this, but that’s not always the case. People cut corners. And in the event that certain crews cut corners, don’t check for voltage and investigate where the voltage source is, and start touching wires and introducing paths to ground, people can get seriously injured or die.
You may think that because solar panels are current-limited that this fact protects workers in the event of becoming exposed to live voltage, but any combination of voltage and current can kill.
I’ve always wanted DRM for my inverter.
In the context of safety, this is a good thing. Skirting DRM on movies or TVs won’t mean you injure yourself or others or worse. Skirting inverter settings can cause inverters to operate in ways that are unintended, and could hurt people. These things are not the same, and it’s concerning that you can’t see the difference.
Also, having locks on settings means that other bad actors are deterred from changing those settings maliciously, whether intentional or not.
There is not substitute for a qualified person operating and maintaining an electrical system, regardless of voltage.
I think it should just require a permit
Agreed
- Comment on Easy-to-use solar panels are coming, but utilities are trying to delay them 1 week ago:
Inverters in the US are all listed to UL1741-SB which dictates that they shall cease to energize their AC outputs if they sense an absence of grid voltage.
Now, one thing people are ignoring is that UL1741-SB allows for islanding protection, and the disablement of it. If an inverter has its settings changed such that islanding protection is OFF, then the inverter will keep sending power to the “grid” because it thinks it’s operating on a microgrid that was previously disconnected from the larger grid via a Microgrid Interconnection Device (MID).
The settings these inverters have are user-settable, which means they need to be checked by a qualified person, either a contractor, engineer, or inspector. These settings must also often be checked by the utility you’re interconnecting to before they allow you to energize, so usually all of these parties have eyes on the inverters’ settings and can stop work before energization until things are corrected.
Ultimately I agree with you. If we don’t want to have to need inspections for every solar installation, especially residential ones and especially where plug-and-play solar modules are used, then inverters need to have their settings pre-configured for the grid code in the factory that then cannot be changed by the user or operator in the field. That would be a way to shoe-in this kind of installation.
Hard setting grid codes into inverters prior to shipping to site might be overly conservative though, especially as utilities change their grid codes over time. You need to have a way to update those settings, which could be using a wireless portal hosted by the inverter OEM with credentials made only available to the OEM. Problem with this is that then you shift the burden of configuration to the manufacturer which already has a ton of other UL standards as well as rules and regulations to follow.
What do y’all think?
- Comment on An 18-year-old woman in Queensland faces two years in jail for wearing a shirt that says "from the river to the sea." 1 week ago:
Free Palestine
- Comment on The Myth That Wind Farms Are a Guillotine for Birds Is Being Debunked by Hard Data 1 week ago:
- Comment on the world 2 weeks ago:
Every horror movie:
- Comment on Google's AI Sent an Armed Man to Steal a Robot Body for It to Inhabit, Then Encouraged Him to Kill Himself, Lawsuit Alleges. Google said in response that "unfortunately AI models are not perfect." 2 weeks ago:
The real title is always in the comments
- Comment on Google's AI Sent an Armed Man to Steal a Robot Body for It to Inhabit, Then Encouraged Him to Kill Himself, Lawsuit Alleges. Google said in response that "unfortunately AI models are not perfect." 2 weeks ago:
Allegedly
- Comment on 2022 was a bleak year 😢 2 weeks ago:
What!? TIL. Fuck man
- Comment on 2022 was a bleak year 😢 2 weeks ago:
Loved it when Panda Express had their Beyond Original Orange Chicken. Hadn’t had that food for years before they brought in a vegan protein option.
Need more vegan protein options everywhere!
- Comment on "Being vegan is unnatural" 3 weeks ago:
it is not true.
It is
- Comment on "Being vegan is unnatural" 3 weeks ago:
It is not. I’m sorry you have a different version of reality.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Both of you admitted animals are lesser when you negated artificial insemination with rape. There’s no going back now.
- Comment on "Being vegan is unnatural" 3 weeks ago:
You’re telling me to be civil while theunknownmuncher’s beliefs are allowed room to breathe.
You take a side when you do this because these types of belief should be silenced. Genocidal, violent, psychopathic beliefs should not be given platforms to fester online.
Telling me to be civil is muting the response needed to counter these horrific ideas. This type of apologia and these kinds of ideas contribute to furthering domestication and slavery of animals.
You are being the equivalent of a US Liberal telling Leftwingers to follows rules and procedures to counter Right-wing fascism. Ideas of oppression, no matter the group of people or species of life, need to be shunned.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Then why won’t you say that artificial insemination IS rape?
Because that’s my whole argument. It has been my whole argument, and will continue to be my whole argument, regardless of how much you try to derail the conversation.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Artificial insemination is not a veterinary procedure though. It’s a forced action on a animal that violates their consent.
How the fuck do y’all not recognize this.
- Comment on "Being vegan is unnatural" 3 weeks ago:
I’m questioning your support for psychopathic opinions. Because it is psychopathic to think of animals as lesser beings compared to humans that deserve less dignity, respect, and moral consideration.
That is what both you and theunknownmuncher are defending. Disgusting.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Theunknownmuncher said that I trivialize the experience of human rape victims. I never said anything that would trivialize their experiences. I advocated for broadening the scope of what we call rape to more than just humans. It’s anthropocentric to think that only humans can be raped.
Does this sub encourage bad faith discussions? That seems to be against the principle of civility.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Meet psychopathy with civility? Interesting response.
- Comment on "Being vegan is unnatural" 3 weeks ago:
You made a personal attack when you put words in my mouth and forced me to take a position I never held.
I’m defending myself accordingly.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Interesting to hear this perspective when theunknownmuncher has been doing the same throughout my thread with them and this entire post.
- Comment on "Being vegan is unnatural" 3 weeks ago:
You keep trying to catch me in a trap as if I fell into one. You’re hallucinating.
Real suffering
Shows your speciesist bias. How fortunate that you ignore to acknowledge that bias in order to buff up your argument and make it appear stronger than it is.
Artificial insemination is rape, and cows suffer as a result, just as women do, dogs do, and any other species.
And for the record, you don’t care about women getting raped. You literally don’t give a fuck because if you did, you’d understand the parallels between what humans can experience and what non-human animals can experience. Rape to any animal is a violation that can fuck them up, psychologically!
But your sick, egotistical, selfish world view blocks you from giving a shit. I suspect this world view also extends to other beliefs of yours.
Go crawl back into the hole where you feel morally righteous. Meanwhile, is vegans will continue to fight for animal rights which includes anti-artificial insemination and freedom.
- Comment on "Being vegan is unnatural" 3 weeks ago:
It’s so sad that you have to project your own lack of self-awareness just to make your argument. Clearly grasping at straws here.
In the meantime, us vegans will keep convincing people successfully that any animal can be raped, and especially cows who are artificially inseminated.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Yes dumbass. I said that IN THE CONTEXT of referring to how humans, cows, and dogs aren’t ALL the same. However, humans, cows, and dogs are ALL sentient beings with the capability to communicate and experience pain. In that way, consent is real for them, and artificial insemination via non-consent is rape for ALL of them.
You’re trying to trap me in a cognitive fallacy, when the really fallacy is your inability to understand nuance and context. Truly not shaking the dumbass reputation.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Artificial insemination is equivalent to rape though. That’s been my whole argument this entire time.
And instead of finding good reasons to refute that, you’re doubling down on straw mans and trying to derail the conversation. You’re sweating that I won’t give up to your bigoted views.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Cope. You’ve ran out of arguments, but you’re trying to cover your ass to make it look like you’re the one that came out on top.
Keep up the debate if you’re not uncomfortable with people pointing out the flaws in your world view for all to see.
- Comment on "Being vegan is unnatural" 3 weeks ago:
Show me where I perfectly equated humans to cows, cows to dogs, or dogs to humans.
It’s okay to feel uncomfortable and conflicted right now if you can’t find it. Perhaps dwell on the fact that you actually do understand that they are the same IN THE WAYS I DESCRIBED while simultaneously clinging to a world view that requires them to be different.
- Comment on "Being vegan is unnatural" 3 weeks ago:
You wouldn’t change your mind that we should do everything we can to prevent such an event from happening?
You’d just accept your fate?
- Comment on "Being vegan is unnatural" 3 weeks ago:
The fact you can’t see how contradictory this is is quite humorous.
- Comment on "Being vegan is unnatural" 3 weeks ago:
What if someone were to use that power and kill you?
- Comment on "Being vegan is unnatural" 3 weeks ago:
How do we know that artificial insemination isn’t traumatizing to cows? Where is your evidence of that? You claiming that rape to cows is harmless is trivializing.
Comparison doesn’t mean perfect equation. Don’t fucking put words in my mouth.
