Query, 13mm² cable required for inverter to cu for solar install.

[RandomGrinch]

Chinese volts and amps might be different to European volts and amps too.

As it happens, a Chinese inch (A cun), is 1.3123 in.

 

[ninro]

The manual is here: https://midsummerwholesale.co.uk/pdfs/en-k-manual-v1.4.pdf
appears that the 13mm size refers to the outer diameter of the round cable that can be used with the AC connection plug but has been jumbled up with other information. Page 17 onwards.

A 100A breaker will be of no use - plenty of homes have an incoming supply smaller than that.


If that flat cable has been shoehorned into the inverter connection plug, it's the wrong type.
May not be secured properly.
Round cable is required.

Thanks, so this uk version says the breaker should be 80a for our install with battery. Still a lot bigger than the 32a that was used. On a foxess forum a couple of people reckoned a 40a would do.

 

[ninro]

Could you post a photo of your CU?

Yeah, found some on my phone. Second was yesterday for evidence of trip.

 

[EFLImpudence]

7kW @ 240V is 29.2 Amps so 32A RCBO and 4mm² cable.

Did you decide what size cable yours is?

 

[ninro]

7kW @ 240V is 29.2 Amps so 32A RCBO and 4mm² cable.

Did you decide what size cable yours is?

Don't quote me on what I think cables do or go exactly where, unsure of that but here's a photo of the cables. Both dc coming from pv and to cu. This what you would expect?

 

[ninro]

I should add resetting the breaker has not brought the system back up. Its still gives a grid lost fault. Would this be due to damage to the breaker after it tripped?

 

[JohnW2]

Chinese volts and amps might be different to European volts and amps too.
Mr Hill (Benny) claimed that a child was named at what we might refer to as the Christening Party, they`d eat the meal, wipe the cutlery then throw it high into the air and the sound it made when hitting the table/floor as it landed is what they called the child.

Mind you, I don't recall having herd of many people called "Clatter"

 

[JohnW2]

Thanks, so this uk version says the breaker should be 80a for our install with battery. Still a lot bigger than the 32a that was used. ....

Sounds more like plumbing than wiring

This documentation seems to be extremely odd.

 

[EFLImpudence]

, its grey cable, its width longer than its height. How can I identify what gauge cable they've actually used?

Electrics:flatpvccables

www.diynot.com

 

[Risteard]

7kW @ 240V is 29.2 Amps so 32A RCBO and 4mm² cable.

Did you decide what size cable yours is?

You don't want minimal cable sizings with PV.

 

[Murdochcat]

Who installed all this ?

 

[JohnW2]

You don't want minimal cable sizings with PV.

Maybe that's why they are asking for a cable with a 22mm outside diameter

 

[Risteard]

Maybe that's why they are asking for a cable with a 22mm outside diameter

I'm not for a minute defending the demands made by the manufacturer!

 

[ninro]

Who installed all this ?

Probably best not to name our installer. Give them time to rectify. They are reputable.

 

[ninro]

One thing I've confirmed with fox UK support is that the breaker should be at least 40a.