this post was submitted on 09 Aug 2024
159 points (95.4% liked)

Today I Learned

17311 readers
1031 users here now

What did you learn today? Share it with us!

We learn something new every day. This is a community dedicated to informing each other and helping to spread knowledge.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules (interactive)


Rule 1- All posts must begin with TIL. Linking to a source of info is optional, but highly recommended as it helps to spark discussion.

** Posts must be about an actual fact that you have learned, but it doesn't matter if you learned it today. See Rule 6 for all exceptions.**



Rule 2- Your post subject cannot be illegal or NSFW material.

Your post subject cannot be illegal or NSFW material. You will be warned first, banned second.



Rule 3- Do not seek mental, medical and professional help here.

Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.



Rule 4- No self promotion or upvote-farming of any kind.

That's it.



Rule 5- No baiting or sealioning or promoting an agenda.

Posts and comments which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.



Rule 6- Regarding non-TIL posts.

Provided it is about the community itself, you may post non-TIL posts using the [META] tag on your post title.



Rule 7- You can't harass or disturb other members.

If you vocally harass or discriminate against any individual member, you will be removed.

Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.

For further explanation, clarification and feedback about this rule, you may follow this link.



Rule 8- All comments should try to stay relevant to their parent content.



Rule 9- Reposts from other platforms are not allowed.

Let everyone have their own content.



Rule 10- Majority of bots aren't allowed to participate here.

Unless included in our Whitelist for Bots, your bot will not be allowed to participate in this community. To have your bot whitelisted, please contact the moderators for a short review.



Partnered Communities

You can view our partnered communities list by following this link. To partner with our community and be included, you are free to message the moderators or comment on a pinned post.

Community Moderation

For inquiry on becoming a moderator of this community, you may comment on the pinned post of the time, or simply shoot a message to the current moderators.

founded 1 year ago
MODERATORS
 

Some more info in the Wikipedia article. And yes, this is about DC Solar, which I guess many americans will know but as someone from europe this was totally new to me.

Wild just how far he got running this shit.

top 16 comments
sorted by: hot top controversial new old
[–] [email protected] 24 points 1 month ago* (last edited 1 month ago)

Pretty misleading. The problem isn't that he had diesel generators in the trailers, that's standard practice. It's that he built a very tiny fraction of the number he promised investors he had actually built, and spent the rest of the funds.

Edit: in case this comment is confusing, reason is OP drastically changed their title without noting the edit.

[–] [email protected] 23 points 1 month ago (2 children)

Wouldn't they be loud af? How did nobody question the noise?

[–] [email protected] 12 points 1 month ago

The people buying them probably weren't the ones using them

[–] [email protected] 8 points 1 month ago

From reading about it on other websites, it sounds like all the customers buying these were well aware that they were buying generators.

[–] [email protected] 13 points 1 month ago (1 children)

Having generators together with the solar panels is completely normal.

From what I understand the trailers were supposed to provide backup power to cell towers, sporting events, etc. Solar can provide small amounts of "free" power but you lose it when it's cloudy or dark. It also can't meet high power demands for when a lot of power is needed. Normally these problems can be offset by having more solar panels and large battery banks, but that's not a good option for a trailer mounted backup system.

A diesel generator can provide a huge amount of power in a comparatively small package, making it a much more reliable power source. You can provide backup power with just a generator (no solar), but you usually can't provide enough backup power with just solar. For example, my local emergency services has a 200kw trailer mounted generator they can use if their main generators are down. A solar system capable of generating that much power would need to be at least 115 sq ft, and would require a ridiculous lot of batteries to make the power available consistently.

Any off-grid set up will usually combine solar and generators, they both have advantages. But a trailer mounted generator can easily be 100s of KW, which isn't a feasible amount of power to have be portable with solar.

[–] [email protected] 2 points 1 month ago* (last edited 1 month ago) (3 children)

How big is that trailer? Semi trailer big?

Semi trailer is 53'x8.5'x13.6'. Roughly 6100sqft.

Based on this site and somwhat lazy math, a standard semi truck trailer can have roughly 75kw worth of solar panels on it with 400w panels. If we can get 500w panels in the same form factor, we can get to 100kw worth of panels on a semi truck trailer.

You may even be able to get even more panels on if you build in awning system like here:

We ain't to 200kw yet, but its getting closer.

[–] [email protected] 8 points 1 month ago* (last edited 1 month ago) (1 children)

Your math is off, it shouldn’t be 3 measurements for area, you’re using cubic feet by accident. So off by a factor of one of your measurements.

[–] [email protected] 3 points 1 month ago (1 children)

Factor of 8.5, since that's the height of the vehicle. So 9-11kw. Enough to power a house if paired with batteries.

[–] [email protected] 1 points 1 month ago

That’s actually not too shabby, and you could easily triple the capacity with some hydraulic foldouts. I would worry about snow load with that myself, but I’m sure it could be made to be sturdy enough.

[–] [email protected] 4 points 1 month ago

No, it's a lot smaller than a semi trailer. A semi trailer can hold at least a Megawatt generator if not bigger.

The 200kw generator they use is a military model, maybe 4.5'x10' in size?

[–] [email protected] 1 points 1 month ago* (last edited 1 month ago)

Less than 4'x8', more like 3-1/2' x 6'. Roughly 20 Sq ft. What kind of solar generation are you going to do in 20sq ft? Not much. That's like 9 panels, at 100w each under ideal conditions.

Once you start doing your own math for your own camper, it suddenly becomes painfully clear how limited solar still is, even with lithium batteries that weigh half as much as a lead acid, and store twice as much energy.

[–] [email protected] 10 points 1 month ago

Imagine running a ponzi scheme to fund a baseball team and only getting 6th in a 6-team league

[–] [email protected] 4 points 1 month ago

A few years back you could buy a trailer mounted solar/battery/gen with a huge light stack for pretty cheap because the batteries were due for replacement. A lot of people bought them up and turned them into emergency power systems for their homes.

There’s no reason to not have multiple energy sources for these types of things.

[–] [email protected] 3 points 1 month ago

On November 9, 2021, Jeffery Carpoff was sentenced to 30 years in prison after he pleaded guilty to charges of conspiracy to commit wire fraud and money laundering.

[–] [email protected] 2 points 1 month ago* (last edited 1 month ago)

Interesting share, thanks, hadn't heard of DC solar...wow.

[–] [email protected] 2 points 1 month ago

Fake it till you make it.