What is the longest cable run u have done in meters for a sunnyboy1200 the main bord?

[bob2041]

-What is the longest cable run u have done from the sunnyboy1200 to the main fuse board, its says max cable 2.5mm2 no longer then 30 metres. What happens if go 25 metres to a 30amp junction box and from the junction box put 4mm2 cable running 30 meters to the main fuse board. How would this fair out ?

I ran the cable when i had the soladin 600 ,then i got the sunny boy a year later and manual is more strict with only 30 meter cable run max.

 

[jason121]

Re: What is the longest cable run u have done in meters for a sunnyboy1200 the main b

The a.c. cable connecting the inverter(s) to the consumer unit should be sized to minimise voltage drop. A 1% drop or less is recommended. However in larger installations this may not be practicable or economic due to the very large size of cable resulting. In this case the designer should minimise voltage drop as far as possible and must remain within voltage drop limits as prescribed by BS 7671.
[FONT=Calibri,Calibri][FONT=Calibri,Calibri]Note: the requirement for a 1% voltage drop is due to two reasons: firstly when generating, the voltage at the inverter terminals is higher than the voltage at the suppliers cutout – during periods of high power output this voltage drop must be kept to a minimum in order to prevent the inverter nuisance tripping on over voltage ; secondly the requirement ensures losses from the PV system are minimised.
[/FONT][/FONT]DTI GUIDE

 

[bob2041]

Re: What is the longest cable run u have done in meters for a sunnyboy1200 the main b

The a.c. cable connecting the inverter(s) to the consumer unit should be sized to minimise voltage drop. A 1% drop or less is recommended. However in larger installations this may not be practicable or economic due to the very large size of cable resulting. In this case the designer should minimise voltage drop as far as possible and must remain within voltage drop limits as prescribed by BS 7671.
Note: the requirement for a 1% voltage drop is due to two reasons: firstly when generating, the voltage at the inverter terminals is higher than the voltage at the suppliers cutout – during periods of high power output this voltage drop must be kept to a minimum in order to prevent the inverter nuisance tripping on over voltage ; secondly the requirement ensures losses from the PV system are minimised.
DTI GUIDE

OK... thanks.. looks like i'll have to buy more cable yet again...