Victron Inverter/Charger 12/1600/70 AC out cable size ?

[MarkHoughton]

Hi,
I am still doing the prep to install the Victron Multiplus 1600 in my Carthago E-line.
My query is that the older model Multiplus had a 2.5mm cable requirement, but the AC input and output connectors on this new version only have 1.5mm sized connectors ( and is specified as that size cable in the manual ).
However, the existing EHU input cable is 2.5mm ( with WAGO-Winsta771 connector blocks ).
The chart attached shows it is “safe” to use if clipped direct, I take this to mean clipped to the wallboard in the battery/electrical area, effectively in my case with plenty of free air circulation.
I am just confused as to why Victron have reduced the need for 2.5mm to 1.5mm ?
Thoughts anyone ?
Cheers

 

[Ditcha]

Download this app should help on cable sizes

Victron Toolkit - Apps on Google Play

Understand Victron LED codes, calculate cable size & temperature derating.

play.google.com

 

[AdrianChen]

Strange decision indeed! - The online manual states min of 1.5mm required and specifies G-ST18i connectors for the input/output which should be good for 2.5mm/20amp (i version) since they have strain relief in the plug.

Wieland GST18i3 Wieland GST18i3 Cable Plug & Socket Connectors

Wieland GST18i3 Wieland GST18i3 Power Connectors. GST18i3 Screw Slim connector, 3 pole, male plug with screw connection, coding mains 250V, 20A, coding colour black, strain relief colour black. GST18i3 Screw Slim connector, 3 pole, female socket with screw connection, coding mains 250V, 20A...

thepoweroutlet.co.uk

PS. Know nothing about AC (or pretty much anything to be fair) so just had a look out of curiosity. Doubtless one of the more knowledgeable folk will come along

 

[1967bowesj]

Clipped direct would mean clipped or fixed direct to a wall or panel not inside anything so by reducing the amount of current the cable can safely take

 

[stevewagner]

Clipped direct would mean clipped or fixed direct to a wall or panel not inside anything so by reducing the amount of current the cable can safely take

Sorry but it’s the other way round as clipped direct can dissipate more heat, therefore carry more current.

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[1967bowesj]

Sorry but it’s the other way round as clipped direct can dissipate more heat, therefore carry more current.

Is that not what i said?
Not inside something so by reducing the current capacity.
Think you maybe missundetstud what i wrote

 

[Raul]

For input you can get away with a short run of 1.5mm2 as the max pass through will be 16A or whatever you set it to, on power control.
On the output will be the 16A from pass trough, plus inverter its own output of 1600 combined in power assist mode. So add another 7A to that 16 coming in.
That will force a minimum 2.5mm2 from inverter output to a immediate double pole 20A breaker, or 16A if you don't want to use the max input/ output combined. But definitely 2.5mm2 for the output, and it fits those connectors as I done it in the past with arctic 2.5mm2 super flex, but crimped some ferules to allow the strands for a good connection.
Don't use solid core twin and earth, it's a mobile install and vibration, fatigue, can cause the ends to break off. I know it has restrain relief on the plugs, but still not advisable to use solid core, unless is a static install.

 

[MarkHoughton]

For input you can get away with a short run of 1.5mm2 as the max pass through will be 16A or whatever you set it to, on power control.
On the output will be the 16A from pass trough, plus inverter its own output of 1600 combined in power assist mode. So add another 7A to that 16 coming in.
That will force a minimum 2.5mm2 from inverter output to a immediate double pole 20A breaker, or 16A if you don't want to use the max input/ output combined. But definitely 2.5mm2 for the output, and it fits those connectors as I done it in the past with arctic 2.5mm2 super flex, but crimped some ferules to allow the strands for a good connection.
Don't use solid core twin and earth, it's a mobile install and vibration, fatigue, can cause the ends to break off. I know it has restrain relief on the plugs, but still not advisable to use solid core, unless is a static install.

I did manage to 'force' in 2.5mm artic cable and got the covers screwed down reasonably well. I was aware of the multi-strand rather than solid cable and had plenty of that already. Cheers