Agree totally, I have/had one foot in the market for Solar, but after a visit by PEA, who offered an "on grid" solution I decided to stay sitting on the fence for the time being. PEA offered 2.4 Baht per KWh produced, which amounted to some ridiculous payback duration, while my requirements where cost savings + backup power ("on grid hybrid" based on @Crossy's excellent paper).
So it's gonna be another few years, hopefully before I die. Since I like simple measures to make decisions I'll look for Solar again once an 80 KWk/day "Off grid" system will have a pay back of about 5 years. (This is a rough measure based on the cost of Panels/Batteries and PEA's pricing). Then I may refine it by putting an EV into the equation, or not. A 5 years payback is only a ballpark figure, as I have no idea about the maintenance costs, repairs, replacements, and cleaning).
In the meantime, I might just buy a genset.