svelte wrote:Is it

[an]

[quote=svelte]Is it this?

15,300 kwh / 10.4 kw = 1471 hours

1471 hours / 365 days = 4 hours / day.

Do I have that right or am I out to lunch?

4 hours a day seems light…[/quote]Usually, I’ve seen solar system talked in term of kWh (# of panels x # watt the panel produced per hour). I think that’s a better way to compare system wrt cost. Since every house is different, it would be hard to compare. It better to compare theoretical max production vs actual production, since every house is different.