> rooftop domestic PV costs can be unto 10 times more expensive on a levelized cost basis ... compared to a ground based utility/grid scale installation Your "

> rooftop domestic PV costs can be unto 10 times more expensive on a levelized cost basis ... compared to a ground based utility/grid scale installation Your "can be" hides a lot of sins. Looking at the data you quote domestic PV also "can be" 1/2 the cost of of ground based utility installation. The truth is between those extremes and will vary a lot depending on situation. But here is something that doesn't vary so much: the difference between the retail cost and wholesale cost is around a factor or 3. Translation: utility solar has to be around 3 times cheaper than domestic before it makes sense to a household. I don't think it's terribly surprising there are a lot of places that factor of 3 tilts the balance in favour of domestic PV.