At this price it would have to be worth a punt surely?

[coopec]

A 5000W Pure sine wave inverter for $64?

What am I missing?




https://www.aliexpress.com/af/inver...itiative_id=SB_20230121030007&origin=n&dida=y

 

[Stemar]

It may be a real bargain, but I think I'd want to connect an oscilloscope to it before hooking up any sensitive equipment. I'd also keep a careful eye on it and have a fire extinguisher handy the first few times I plugged 5KW in. Some Chinese companies are, shall we say, optimistic when writing specifications.

 

[Refueler]

mmmm first view ... WOW ... but you need to click along the options and you see price changing .....

Still cheap but ????

 

[PaulRainbow]

If you're purely buying on price, with total disregard to quality, reliability, safety and the life expectancy of the equipment you plug into it.....

There are even cheaper ones on AliExpress

 

[coopec]

It may be a real bargain, but I think I'd want to connect an oscilloscope to it before hooking up any sensitive equipment. I'd also keep a careful eye on it and have a fire extinguisher handy the first few times I plugged 5KW in. Some Chinese companies are, shall we say, optimistic when writing specifications.

I'd only want it for a microwave, an induction cooking hob or a bread-maker and a....?

I have a 3000W/6000W Giandel installed with a "kill switch" so hopefully that would solve any problem.

 

[coopec]

If you're purely buying on price, with total disregard to quality, reliability, safety and the life expectancy of the equipment you plug into it.....

There are even cheaper ones on AliExpress

I suppose it hasn't got an RCD (protection device) so that would add cost.

 

[PaulRainbow]

I suppose it hasn't got an RCD (protection device) so that would add cost.

No mention of such in the listing, if not, not a big deal to fit one if the inverter is correctly installed.

 

[coopec]

No mention of such in the listing, if not, not a big deal to fit one if the inverter is correctly installed.

Paul

Note #9 (below) They've quoted the intermittent rating??

Still 2500W is pretty powerful, But why make an exaggerated claim in the first place?

 

[harvey38]

Probably worth taking note of Section 9 of the Technical Parameters, effectively de-rating it to 2500w so probably an inefficient unit, unless overrated for sales purposes.

 

[VicS]

I suppose it hasn't got an RCD (protection device) so that would add cost.

No mention of such in the listing, if not, not a big deal to fit one if the inverter is correctly installed.

Probably "centre tapped" earth therefore not suitable for feeding a shore power installation but perhaps OK for "stand alone" use for a single appliance plugged in to it directly.

An rcd would not offer normal protection unless the unit was earthed.

 

[coopec]

Probably "centre tapped" earth therefore not suitable for feeding a shore power installation but perhaps OK for "stand alone" use for a single appliance plugged in to it directly.

An rcd would not offer normal protection unless the unit was earthed.

You say "An rcd would not offer normal protection unless the unit was earthed".

What about Earth Leakage Protection? Would that require an "earth"

My reference is this:
Earth leakage protection and the difference between an RCD and an RCBO - Metroid Electrical Engineering

 

[PCUK]

Actual price of £140.37 is still OK if it does what it says. Obviously no real Warranty as the cost of returning it would probably be more than the cost of the machine. Having said that Aliexpress is fairly reliable in my experience.

 

[VicS]

You say "An rcd would not offer normal protection unless the unit was earthed".

What about Earth Leakage Protection? Would that require an "earth"

My reference is this:
Earth leakage protection and the difference between an RCD and an RCBO - Metroid Electrical Engineering

In your link where it talks about earth leakage protection it actually describes the use of an rcd / rccb. ie detection of earth leakage by detecting an imbalance between the current flowing in the line (active) and the neutral conductors.

The primary purpose of an rcd is protection against electric shock as a result of contact with the line/active conductor and current flowing through the body to earth ( the actual ground beneath your feet or an earthed surface such as the metal case of another appliance , a metal pipe metal sink etc.) and back to the supply source. The current flowing through the body creates the imbalance which an rcd will detect.

 

[Pete7]

I'd only want it for a microwave, an induction cooking hob or a bread-maker and a....?

I have a 3000W/6000W Giandel installed with a "kill switch" so hopefully that would solve any problem.

If you have a 3000w Giandel, why try to use this cheap thing?

 

[[2574]]

A 5kw inverter is going to draw 400A. How big is your battery bank? You’ll need some mighty hefty wire!

 

[KompetentKrew]

The price reflects the fact that you've selected the 1600W option, not the 5000W one.

You can see this right under the price where it says "Color: 1600W EU".

You can select a different option by selecting one of the other image icons (encircled in green in this pic).

AliExpress is the land of buyer beware - I bought an expensive gaming laptop from the manufacturer's official store on there, but it made me nervous. Mostly I use Ali only for shite so cheap that I won't mind if it doesn't turn up or is a disappointment (examples).

Never buy USB flash drives, SD cards or hard drives from Ali, as it's well known for fakes - your 1TB hard-drive will turn out to have a 32GB flash drive inside which is pretending to be 1TB and just dumping all your data.

 

[coopec]

If you have a 3000w Giandel, why try to use this cheap thing?

No! I'm not trying to use a "cheap thing" I was just incredulous at the price!☹

I bought a multimeter the other day for about $A5.70 on AliXpress. I wonder if it will work?? (I've got others I can test it against)
0.08￡ 97% OFF|Dt830b Ac/dc Lcd Digital Multimeter 750/1000v Voltmeter Ammeter Ohm Tester High Safety Handheld Meter Digital Multimeter - Multimeters - AliExpress

 

[coopec]

A 5kw inverter is going to draw 400A. How big is your battery bank? You’ll need some mighty hefty wire!

As stated elsewhere I don't plan to buy one (just incredulous at the price)

They do point out the 5000W unit is only capable of 2500W continuous don't they?

 

[coopec]

In your link where it talks about earth leakage protection it actually describes the use of an rcd / rccb. ie detection of earth leakage by detecting an imbalance between the current flowing in the line (active) and the neutral conductors.

The primary purpose of an rcd is protection against electric shock as a result of contact with the line/active conductor and current flowing through the body to earth ( the actual ground beneath your feet or an earthed surface such as the metal case of another appliance , a metal pipe metal sink etc.) and back to the supply source. The current flowing through the body creates the imbalance which an rcd will detect.

This is a subject that I will have to research.

From what you say then the electrical extension "cord" I have with some sort of safety device is in fact an RCD? (Let's not get too technical as I plan to spend some time on the subject)

Just been doing more googling and I think I've found the cause of my confusion. I think at one time voltage operated devices were mandatory in Australia but then the standard was switched to current devices.

There are two types of Earth-leakage circuit breaker:

• voltage operated (referred as ELCB in this article) and,
• current operated (referred to as RCCB in this article).

Earth-leakage circuit breaker - Wikipedia

 

[QBhoy]

At an initial glance…it mentions only being rated at 1500w. I’ve also noticed that more and more of these things being advertised as pure sine wave but are actually anything other than just that. Can be modified at best