How do I find Ramp Rate of my inverters?

[antscozz]

I'm filling out the application local utility company for my grid tie system. I got the equipment (cheap) used it is a bit over 3 years old 8.61 KW. There are 3 inverters ... one Sunpower 4000m, one Sunpower 3000m and one Sunny Boy 4000-US. The utilty is asking 2 questions on the application that I cannot find the answer to ... 1) What is the "Ramp Rate" of the inverter(s). 2) What is the step up transformer winding configuration: Wye-Wye, Wye-Delta, Delta-Wye. Any help with this would be greatly appreciated. Thanks

[J.P.M.]

I'm filling out the application local utility company for my grid tie system. I got the equipment (cheap) used it is a bit over 3 years old 8.61 KW. There are 3 inverters ... one Sunpower 4000m, one Sunpower 3000m and one Sunny Boy 4000-US. The utilty is asking 2 questions on the application that I cannot find the answer to ... 1) What is the "Ramp Rate" of the inverter(s). 2) What is the step up transformer winding configuration: Wye-Wye, Wye-Delta, Delta-Wye. Any help with this would be greatly appreciated. Thanks

Anything in the manuals of help ?

[antscozz]

Anything in the manuals of help ?

I couldn't find anything in the manuals ... I'm wondering if there is a different term for "Ramp Rate" that the manufacturer is using .... it may be there but I'm just not connecting the two?

[J.P.M.]

I couldn't find anything in the manuals ... I'm wondering if there is a different term for "Ramp Rate" that the manufacturer is using .... it may be there but I'm just not connecting the two?

A phone call to the manufacturers ? Sunpower rebrands other mfg. products.

[inetdog]

I'm filling out the application local utility company for my grid tie system. I got the equipment (cheap) used it is a bit over 3 years old 8.61 KW. There are 3 inverters ... one Sunpower 4000m, one Sunpower 3000m and one Sunny Boy 4000-US. The utilty is asking 2 questions on the application that I cannot find the answer to ... 1) What is the "Ramp Rate" of the inverter(s). 2) What is the step up transformer winding configuration: Wye-Wye, Wye-Delta, Delta-Wye. Any help with this would be greatly appreciated. Thanks

The ramp rate is the rate at which the power delivered increases from zero to maximum when the interactive generation system is turned on. It is a parameter which is most suited for describing a large scale generator rather than an 8kW GTI system.
As far as I know the GTI will go from zero power to full delivered power in just one cycle once it has qualified the grid voltage as within specifications.

And most if not all small GTI installations do not use any transformers at all.
I suspect that your utility has given you a form which is appropriate to several megawatt co-generation systems rather than to consumer scale PV.