What do you think ? [dodgy looking ebay items]

[tom66]

I believe Photon measured the short circuit current of a standard car battery as being around 600 - 700 amps - so providing anywhere near that for an inverter, forget it...

[bilko]

A standard car battery wouldn't cut it anyway. You need a bank of deep cycle batteries. For 8kw I would guess at 10 8D 220AH AGMs in parallel.  www.batterymaster.com/pdf/tr/marina/Trojan%208D-AGM.pdf
What's funny though is that the add says you can use this 8kw inverter to run shavers and pruners, a bit over capacity and highly inefficient for that task.
I agree with comments about the table at the end of the advert. I wonder if they are quoting power in the same way as they quote a 2000W amplifier that runs off a 5W wall wart, who knows.

[tom66]

Perhaps it's like the POS "1200W" car audio amplifier I was given to evaluate.

Turned out the maximum power I could get it to draw was about 80W. When you include the maximum efficiency of a class-AB (78.5%), it puts it near 63W at best. Completely crap!

[RCMR]

Somebody needs to splain to the chinese how to put women into product photos without it being obvious that they are hoping the girl gets your attention instead of the product your buying.

Was that a woman -- I thought it was a ladyboy 

[Ed.Kloonk]

Somebody needs to splain to the chinese how to put women into product photos without it being obvious that they are hoping the girl gets your attention instead of the product your buying.

Was that a woman -- I thought it was a ladyboy 

Sideways?

[SeanB]

Ed, you lead a sheltered life there in the outback..........

[Ed.Kloonk]

Ed, you lead a sheltered life there in the outback..........

hehehe

[Simon]

There's also the eBay fees of about 9%, paypal sucks a few percent as well... the only way I could compete is by service (keeping people updated about the package) and shipping fast ... if I pay about 15 cents extra for priority postage, I usually get my packages in 5-10 days to people in Europe.... the Chinese guys can't really get this fast yet.

It's 10% in the uk + 3.4% from paypal (applies to shipping and goods price) + 0.2GBP. By the time I have finished selling most stuff I've already lost about 15% to a bunch of tossers who don't actually give a shit when I have a problem with their crap service. I'm actually exploring ebid now but they have such a silly convoluted signup and selling structure it is no surprise they never took off.

[AntiProtonBoy]

I think they have the UK market cornered:

[Simon]

To be honest it's so pathetic I don't think most would "buy it", they need to pay millions to a marketing company before they'll get us to fool for that shit  . That police jacket is just to hide the lack of um.... assets

[tom66]

eBay fees are extortionate, but because they have a monopoly, you are stuck with them. What other retail platforms charge 15%?

[Simon]

well people could use other platforms in protest. I am seriously looking at ebid. Cost me £0.05 for a buy it now type listing (eBay charge £0.40) and I forget what the fees would be if i sold anything but well under 10%. The only problem at the moment is that they are a maze to get started with and they try to get you to pay for a lifetime membership so it can be off putting.

[Psi]

In case you've not noticed, its a "power jack" inverter.
The same brand as that post a while back, remember all the issues the guy documented with it.
http://ludens.cl/Electron/chinverter/chinverter.html

[bilko]

In case you've not noticed, its a "power jack" inverter.
The same brand as that post a while back, remember all the issues the guy documented with it.
http://ludens.cl/Electron/chinverter/chinverter.html

@PSI,
Thanks for the reminder, I knew I saw it somewhere else.
It is a very inefficient design, there are 15 year old MSW inverters quoted at 94% efficiency. At 8Kw it does make a difference.

[Mechatrommer]

That police jacket is just to hide the lack of um.... assets

now you talk! how about the englandUK flag? to hide the lack of the "liner" or "irregular texture"?
electrons flow better in vacum. so a suction pump could be handy

[Simon]

That police jacket is just to hide the lack of um.... assets

now you talk! how about the englandUK flag? to hide the lack of the "liner" or "irregular texture"?
electrons flow better in vacum. so a suction pump could be handy

again you are spouting incomprehensible nonsense in a poor attempt to make a double meaning joke.

[Mechatrommer]

sorry if i "miscomprehend" your "joke". its GIGO stuff

[Simon]

I think a language barrier is part of the problem

[Mechatrommer]

I think a language barrier is part of the problem

and geographic, culture, religion, implementation and "state of mind". some prefer skinny some prefer fatty

[Simon]

quite

[LaurenceW]

There are some fine products that come out of China - this is not one of those!

And there's more marketing cr@p - "Modified Sine Wave" - They mean "square wave". And that means BIG trouble to many sensitive loads, at any wattage.

8,000W??? MY @RSE!

[brainwash]

And there's more marketing cr@p - "Modified Sine Wave" - They mean "square wave". And that means BIG trouble to many sensitive loads, at any wattage.

8,000W??? MY @RSE!

Modified sine wave means a square wave with a 3-state output: positive, zero, negative, [zero]. It's actually much gentler on engines and similar loads than a pure square wave. There is a paper somewhere on the internet discussing the number of harmonics and how they affect various consumers.

Regarding the reliability thing, well, I assume by know that it's almost rule of thumb among the users of this forum to actually 'tear down' brightly coloured stuff before plugging it in.

[amyk]

Found this amusing bit from the "10kW" inverter's page:

The plugs are made only for an output up to 200 Watt.Please don’t use Inverter and Appliances which have a higher operating level.