[RE-wrenches] PV watts question

[jay]

HI All

I’m working with a customer who’s pretty savvy and is using PV watts for his design.  

What I can’t figure out is the kwh/year goes down if he uses dc/ac ration of 1.5 instead of 1.2 which is the default.

Hes in Santa Fe NM.

.8   ratio=  1663 kwh/yr
1.0 ratio = 1668 kwh/yr
1.2 ratio =  1671 kwh/yr
1.5 ratio = 1623 kwh/yr

I was expecting that more PV = more kWh/yr.

What am i missing?


standard module
fixed roof mount
14.08 loss’s
10 degree tilt
180 degrees 



jay