> If you take the reasoning one step back, wouldn't it be easier to optimize the consumption side (low hanging fruit) in favour if optimizing the cost per unit of energy?
Yes, absolutely.
In general, if you talk to a good solar sales rep, they'll first ask if you have done energy efficiency projects. If you have good quality windows, insulation, appliances, etc, not only are you going to be more efficient up front but you'll need a smaller array+battery overall.
There are also tax benefits for doing some of those projects together so you get some upside there too.
Yes, absolutely.
In general, if you talk to a good solar sales rep, they'll first ask if you have done energy efficiency projects. If you have good quality windows, insulation, appliances, etc, not only are you going to be more efficient up front but you'll need a smaller array+battery overall.
There are also tax benefits for doing some of those projects together so you get some upside there too.