The verdict is in - the new canopy on the deck and the retractable awning over the kitchen window have saved us money on our power bill. We're using an average of 5kWh less per day this year compared to the same time last year - meaning we saved over $35 this month on electricity. Impressive given that the cost-per-unit is more than last year. More pleasing is that this is the lowest July bill we've had since 2005. The west-facing kitchen is no longer heating up the house which means the a/c isn't on as much. Sweet.