Відео

Hello, I would like to ask how long I can capture video from Hikmicro? If I press the video capture button once, how long is the longest I can capture video? Is it possible to record video very small animal in 1 m far, such lizards?

You absolutely killed this product review. The content was extremely rich

The US government imposes an 9hz limit on infrared sensors, FLIR cant sell/export infrared sensors with a high FPS because they could be used for weapons. Asian sensors aren't artificially limited.

Call J G Wentworth. 877 splash wow

Sounds like a sim is doing this maintenance.

Is that SMA? Curious which model.

Common in hobbyist electronics It's cheaper to make

Breakoff pcbs are kinda common in telecom and some hobbyist boards.

That was laborious…. Wish you had gotten to the point faster.

Good to know that it works on most connectors! Thats the main reason I was skeptical of the serpent(no longer post this review). My daily is a Milwaukee control screwdriver.

Could the wire strands have moved with the change in temperature and caused the connection to become weak?

Really great video. Thanks.

im obsessed with ur PURPLE BEARD

I like no racking... just lay the panels on a form board 12 inches off ground... large strings, clamps only on the board side and wallah! Cheapest, fastest roi, no need for rsd. No inspection

The new-ish fashion of micro-inverters somewhat offset electrical risks : the micro-inverter reliably cut power when the mains is in off position. For people with battery systems it is needed to cut cords or shut off both before and after battery, and the way to turn those off should be available outside of the building. One micro inverter for each panel or pair of panels limits voltage and also reduces drastically the dangerous DC side. I also prefer the efficiency of large inverter system with long strings of panels, especially when the area has only one orientation and is well lit by the sun. But If I was to install some solar in tricky orientations, varied, and with partial shadows, I would choose the microinverters, also simple grid tie is a lot less complex than adding a battery in the mix. Enphase batteries are hugely overpriced, capacity is abysmal, and inverter power available when dark or cloudy is also abysmal. For my house that also have 2 businesses I 've chosen an off-grid system, with the ability to plug in a big battery charger on the grid in case of failure or if there are 5 straight days or rain in winter. 3 years it did not happen.

Residential rooftop solar is one of the absolute worst use cases for solar. Commercial rooftop solar has a dozen advantages over it. Why aren't we investing in that???

Nice video, well done. Like and sub'd.

firefighter unfamiliarity yes, but also a lot of lobbying by Enphase and SolarEdge in 2014, 2015, 2016 and by then, they locked in 90% of the resi sites.

Anyone who has experience with solar arrays knows that zip ties do not save lives and are often degraded and fall apart after a few years and the wires fall all over the place. This video appears to be biased and promoted by companies that lost market share to Enphase and SolarEdge and Tesla who use reliable switches to remove the deadly voltage and current from the system by isolating it into smaller, less hazardous sections electronically. My car has electronic airbags and anti-lock brakes with 100s of electrical connectors. By Derek's logic this means my car is less safe, so I should remove these safety systems or drive a care from the 70's because its inherently safer. Maybe airplanes should remove the numerous safety systems and 1000s of connections they use to keep us alive every day? What Derek is missing is that technology enables safety systems to evolve and become safer by reducing risk to life by simply removing the energy, and we see examples of this evolution in our daily lives and in products we use every day. I do applaud Derek for his research in code development history, and work in the solar industry as an installer, but he has no idea about how life safety systems work from an engineering or historical standpoint. I'm disappointed to see him promoting zip ties as life safety devices. I'm optimistic the industry and certification labs will clamp down on the companies taking shortcuts when it comes to life safety for fire fighters, or anyone that works around a solar array. UL 3741 needs revisions to close some of these loopholes exploited by these examples.

This is a very informative video, and I agree with a lot of it. However, I don't view 690.12 as a "UL3741 vs. MLPE" for rapid shutdown compliance. Article 690.12(B)(2) provides 3 options (depending on Code cycle) and the industry finally has another choice beside MLPE since there are finally some PVHCS out there. Burned strings of modules are great for anti-MLPE arguments, but the underlying issue in our industry is module connectors, not the scary optimizers or microinverters themselves. Our installers suck at making proper connections AND using the proper connectors per 300.33(C). Many commercial rooftops can take advantage of UL3741, but not many residential systems will since the inverter must be placed on the roof. As with most things, anti-MLPE folks will jump on a UL3741 system and never look back, regardless of whether or not they are saving money- which is what this really boils to. Some will be on the fence but try it out anyway. Project 5 years from now, and we will see how it all pans out. As with most things in our industry, the right answer is "It depends."

I love your video. It was super educational. (And, I am a microinverter fan and Enphase investor.) UL 3741 is a blow to Enphase.

Great Video!

Man I just want to find a used tractor with back hoe

you have to be both a high & low voltage electrician, and a network admin

Tesla has been good for the industry in promoting the benefits of solar and getting more people on board but yeah, their customer service is the absolute worst

lol I can't take you seriously with the purple beard

😲😲

Hey Derek! Thank you for putting together such a detailed and informative video. We appreciate the shout out as well! At IronRidge we want to help ensure that installations and services remain relevant and compliant in a dynamic market - while providing incredible savings.

Great job, love your videos!

All these regulations are a great way to kill innovation and ultimately lessen the spread of solar.

The company that built Dietz and Watson previously built some of the most absolutely horrible projects with zero wire management.

As someone that literally did electrical engineering design work on a solar RSD, I agree with every point you've made. The whole thing is absolutely idiotic. Every EE I've spoken to that has worked on the devices is 100% against the idea. To add to the issue is that Tigo operated in bad faith. When a bunch of solar manufacturers got together to form the Sunspec RSD standard, all the companies (including Tigo) all agreed to suspend enforcement of any patents that affected the resulting Sunspec implementation. The sunspec standard is a decent one and the industry got on board and everyone started pivoting their independent RSD tech to all use the same keep-alive signal and Sunspec standards for certification. And of course, as soon as everything was finished, Tigo started running around and enforcing those very patents and trying to strong-arm money out of everyone against their agreements to the contrary. On top of that, their legal arguments were absolutely absurd - including claiming they somehow had patent rights for things like powerline signal transmission. Tigo was essentially putting a private tax on every residential solar panel in the country. I think their terms varied from company to company but I know that in some cases, they were asking close to $20 a panel. Now, there's a bunch of lawsuits going around and a ton of money and resources being wasted on this nonsense because Tigo got greedy. The problem with UL3741 as a workaround is that it is an extremely complex standard to meet. It effectively shuts out small and mid-sized solar manufacturers since the certification process is so expensive. It also greatly limits your flexibility in putting a system together since the certification only applies to the very specific products that went through the certification process. Want to use a different brand of rack mount or a different clamp? Now your system is out of cert. This whole thing is due to a very poorly thought out NEC decision and really, the only way to properly fix the issue is to revert that code modification.

To answer your last question, yes. Rapid shut down has been a boat anchor on the industry since it's introduction.

Wonderful video, wonderful intention and we career professionals understanding the impact of this ,deeeeeply support this coming change (again) .. I've been here long enough to see it mandated, I look forward to being here long enough to watch it go away! 😆

Derek, really well done video! So, if "old is new" again, are there any new arc-fault protections to ensure no connector fires now that strings can once again be 600-1000V? That was one of the selling points to quality MLPE - arc-fault detection at the module level.

You’re 100% correct on everything you explained on this video regarding the solar industry in general. I used to be a field performance technician for 5 years at a big residential solar company and from my experience the systems that I visited the most were the ones with MLE/RSD. I’ve seen some 10+ yr old Fronius primo inverters that are running strong. It’s almost a gimmick the way companies sell these products like for example “Hey we offer module level monitoring so you can monitor your system (At a big cost of course)”. When in reality as you know module level monitoring is not needed for most residential PV installs. Overall this is great news specially now in these times.

Love the well-used code book library. 😂

Derek, amazing job with this video! It is extremely educational to explain the history of RSDs and the current UL3741. I could not have explained this better, again congrats!

Riding the solar coaster for life!

Heheheheee. First one here

Second

First 😂

It appears the antioxidant application was done poorly, too much = bad and will create added resistance/ potential thermal damage. (a little goes a long way) I would recheck those terminal block torques after a few hours of 60%+ production and clean up the excess noalox...

2 system in 1, water and electricity! Now the customer don’t need to pay for both things haha

Amazing job. Thanks a lot for sharing. Cheers from Argentina. I am a solar installer, with a small company, and your videos are inspirational. Keep on doing it, please!

Im scared to go up a double jump 2 story just relying on 1 suction cup😱 good ideal tho

I prefer lift the solar panels with my hands or the tranzvolt, In fact, use the suction cup only when I have to remove old modules.

Ever get the ice ones in the winter? So beautiful!

Yall are just as bad as LGBTQ.. kinda guessing your with that crew anyway so all makes sense.. just stay th away from our kids

😂 they are In everything already