As I said, they were installed on two separate houses in different locations. Also I'm not connected to the grid. Well other than to charge my batteries, so the chances of that are extremely remote.
Sounds strange. You connect to the grid to charge your batteries?
I'm on Octopus' Energy's Agile tariff. I charge from the grid when I get paid, it's free or if it's extremely cheap and there's been little sun for a few days in a row just to top up. The rest of the time they are charged by solar power.
You're not talking about a power surge then, you're talking about a lightning strike; a power surge does not behave the way you describe it, plus all electronic circuits have built-in measures (either fuses, or specially designed traces) to prevent power surges from destroying the electronics.
I don't need to search the net; I'm an electrical engineer that works in the electronics manufacturing industry.
The components in essentially all modern electronic equipment are pretty much standard, and they do not differentiate reliable devices from unreliable ones. The quality and reliability of a product is determined by the quality control procedures each company places in its manufacturing process: if a company wants to establish itself as a quality manufacturer, then it places strict quality controls that invariably mean a greater than 20% reject rate; as a result, this loss will make the products that enter the market more expensive (but of higher quality). On the other hand, if a company decides to have a 1% reject rate, then it relaxes its quality controls and sells the sub-par components to the cheap distribution channels (e.g. Amazon) without any warranty.
A power surge does occur in the way described and for many reasons other than lighting strikes. Again these surges destroy all sorts of devices hence an entire industry for surge suppressors - something you did not have installed.
You have a very simplistic view of electronic devices; it is not a black or white call, and it hasn't been for at least 60 years. A complex device like one of these cameras we are talking about will go through a hundred tests (a few of them BTW being about surge protection) during its manufacturing process, and the outcome of each test will be rated on a scale; at the end of the process each camera will receive an overall score according to rules established by Quality Assurance, and will be placed in one of, let's say, five Quality bins, A through E.
You clearly don't understand the complexity of these devices. Sure, I can put them on the bench and measure them... but against what? Who's going to tell me what the specs are? Moreover, someone has to give me the Firmware source code because everything is controlled by it, and even if I were to get my hands on it, the code for such a device is about 300,000 lines; do you have any sense of how long it would take to go through that?
No they wouldn't if the competition was equally bad or worse.
LOL, if you cant place it on a bench and determine its fault, get a refund on your alleged degree. Send it to a pro on youtube who has no degree and actually repairs devices for a living....
So you are alive! We didn't hear from you for quite some time......maybe you just didn't have anything to say, right? Well, any way....good to hear from you.
Repair? or Maintenance? or Manufacturing? or Design? or Sales?
So product design, including discrete component selection, plays no part in a manufactured product's dependability and longevity?
This is surprising to me. I worked for a rather large company that built complex devices and we never sorted the non-component devices. They passed the manufacturing tests or they didn't. CPUs and memory chips are tested and bin-sorted, but the user-level devices went directly to shipping or rework.
Every company that offers warranty on their products, absolutely. Otherwise, how would they know how much warranty to offer?
Life priorities had me at the short hairs for awhile! Merry Christmas to you and yours!So you are alive! We didn't hear from you for quite some time......maybe you just didn't have anything to say, right? Well, any way....good to hear from you.
Before you commit to being a full-time Dahua apologist, maybe re-read my original post where I said that even Andy stated that the useful life of these cameras is 5-6 years.
Ah, too late, you are fully committed.
Your reply can’t be taken seriously or the past statements you’ve made, since. You do realize depending upon where a company conducts business said warranty is governed by law!
Test Engineering, Manufacturing Engineering, Firmware Engineering, Failure Analysis, Reliability Engineering, and Quality Assurance Product Management currently.
There are so many teams with so many people involved in product design these days (including component selection) that there are no bad designs anymore, not even mediocre ones. Moreover, the requirements for a product are known at least two years in advance, so you know before you even start the design proper what obstacles you will face. The differentiators are company/team structure (which determines turnaround time), team dedication (willing to work long hours? Weekends?), and personnel.
There is a language barrier. What does useful life mean? There are thousands of members here with dahua cameras older than 5 years with no failures. After 5-6 years of life out of a camera is perfectly acceptable however there is not an 18 percent failure rate.
No bad designs?!?!
That's how we were too up until... maybe 15 years ago? The competition became too fierce, we were leaving too much money on the table with our reject rate, so we had to implement a waterfall process to bin our products; we simply couldn't afford to be selling prime products with full warranty to distribution channels when our competitors were offering near junk in comparison.
They offer 1-year warranty to direct consumers. Their Warranty structure is completely different for OEM and other large customers; Apple is both a customer and vendor of ours, and their products come with much longer warranties.
