The markup on solar in Europe is insane, and it usually comes down to shitty government regulations - we were forced to upgrade to a 3 phase system (even though our net drain from the grid was looking to decrease), install a government monitoring and control system (and were locked out of some inverter settings), and install a lot of questionable 'safety' equipment (like a DC fire safety cutout, which some argue is even a bigger fire hazard than not having it), and basically all but being forced to install a grid-tie system, as isolated systems (that can take but not feed back to the grid) are a legal gray area.
Not to mention, all the red tape.
But in exchange we get to feed back to the power grid for like 5% of the original price. To be fair, we got a substantial subsidy and in the end, jumping through these hoops was only a bit more expensive that going at it by myself and installing the hardware we actually needed and paying for it out of pocket.
sOcIaLiSM!!!