cable resistance

[OGNIB]

Please tell me if I am correct,R1+R2= resistance value of AC cable from CU to inverter ,Zs = resistance value at the inverter, Ze = resistance value of the grid.

 

[GaryM]

it is 6mm 4core twined up so ineffect I been told 12mm.As for the lengh, no sign of it on the certificate but I have measured it ,its 150meters long

That'll give an approximate R1+R2 value of 0.462ohms, add Ze to that of 0.4ohms which you gave and you have a Zs of 0.862ohms.

 

[OGNIB]

So does the inverter work on the Zs value

 

[OGNIB]

Given all the cable information and the resistance values given, do you think the inverter triping out is a cable problem

 

[SolarCity]

What size system is it?

For comparison, we have used 25mm cable for a 100m run on a 4kWp system. Some may say this is overkill - until they end up replacing a 150m cable.

 

[OGNIB]

4kwp system , cable is 12mm, 150meters long

 

[SolarCity]

The cable is undersized in my opinion.