When a system is named 10kw, its real time usage will be maximum 8kw, and this power will be achieved probably from 11:00 to 16:00
After that... or before that... it falls even lower, until it reaches 0, and the inverter turns off...
Heat, angle of the solar powers facing the sun... (prefered orientation for europe is NORTH) north will produce 100% efficiency in perfect conditions, and EAST 90%, but even that 10% will be much difference in the end of the year.. Perfect conditions sadly never exist....
Even more, your solar inverter must be efficient.... same story like Psu's in computers, gold platinum, bronze power supply...
And always use a bigger inverter than your grid system, in order to avoid using it 100% all the time, cause it breaks its efficiency even lower...
for example my named production is 8.5kw, but my inverter is for 12kw.
So when is the market going to adapt and stop buying homes which are inefficient and unsustainable? I see no reason to buy a home which costs in property taxes, and in maintenance, and in utility bills, and it's not mobile?
Why not just buy stock? You might not get 13% a year but you can get 6%, but it's also more liquid and about the same risk. As far as the housing market goes, it's for sure in a bubble. Most houses aren't worth anywhere near what people are currently paying and with 3d printed houses coming it's going to be very clear soon.