Start up voltage

loskie · Dec 19, 2011

How does one determine the optimum start up voltage? I have a 3.6 kwp system in two equal strings into an Aurora 3.6 OUT inverter. Facing SSE with a little shading.The inverter comes with a default start up voltage of 200v. I think each string can be adjusted independantly down to 110v.Sensible advice welcomed.thanksloskie

solarsparkie · Dec 19, 2011

i cant see why you wouldnt opt for the lower as youlll start generating earlier the danfoss ones we use and sell have an automatic low start up then switch as more sun available

solarsavings · Dec 19, 2011

Play around here Power-One String Tool

loskie · Dec 19, 2011

Thanks I did see that but the inverter start up voltage is fixed at 200v.

solarsavings · Dec 20, 2011

If you enter the password on the inverter (0000) you can then change the start up voltage.

loskie · Dec 20, 2011

thanks I have worked that bit out. i think I have been misunderstood. The power one string tool on their website allows you to configure panels plus inverter BUT the start up voltage for the inverter is fixed in the "tool" at 200v which is as it arrives on site.What I wanted to know was what the optimum start up voltage would be for 18 panels in two strings on the same roof facing SSE. Total potential output 3.6 kwp.what are the benefits/drawbacks of lowering the voltage?Many thanksLoskie