what size system can i install, i have been asked to install a 54 panel system

[mmccx]

3840kWp array with Fronius IG TL 3,6 inverter.

As the Fronius inverter has maximum AC output of 3680w, this is 16A.

We have applied to the DNO for this installation and they are holding us up. (Central Networks by the way) Maybe we should just go ahead and install it?

Seems like each DNO have their own rules. JulianC has said it before and I think he is totally right - If the max output of the inverter is 16A, what business is it of the DNO how many panels you have on the roof?

It seems reasonable to expect that the 16A threshold should apply to the inverter and NOT the array power.

+1 agreed

 

[Bendy]

3840kWp array with Fronius IG TL 3,6 inverter.

As the Fronius inverter has maximum AC output of 3680w, this is 16A.

We have applied to the DNO for this installation and they are holding us up. (Central Networks by the way) Maybe we should just go ahead and install it?

Seems like each DNO have their own rules. JulianC has said it before and I think he is totally right - If the max output of the inverter is 16A, what business is it of the DNO how many panels you have on the roof?

It seems reasonable to expect that the 16A threshold should apply to the inverter and NOT the array power.

IMHO yes you can. I assume you will also be protecting the installation with a 16A mcb so even if the inverter does exceed the g83-1 your installation will not. You can also factor in system losses such as voltage drop etc. I think it's safe to assume that this one is notifiable under g83-1 so I would let them know when it's done:yes:

 

[SolarCity]

IMHO yes you can. I assume you will also be protecting the installation with a 16A mcb so even if the inverter does exceed the g83-1 your installation will not. You can also factor in system losses such as voltage drop etc. I think it's safe to assume that this one is notifiable under g83-1 so I would let them know when it's done:yes:

I'd install it on a 20A CB. It's not a good idea to run a CB at it's capacity and it's not there to limit the inverter current anyway.