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I wonder if it would be feasible to add some kind of liquid sodium or molten salts for heat exchanging battery system that would cool the solar panels and store the heat for more power generation at night. This of course would have to be on a large scale project.

But for a solar farm that big 1-2% over that many panels would be a noticeable drop in output. I guess adding new panels to make up for the loss would probably be the easiest method to keep output steady. But who knows what new solar technology we may have in 20 years. Ive also read that...

Dont solar panels have a finite life span?

8,000 is cheap. If its that cheap id probably do a 10kw system. Im hoping to either build or buy a home in the next 12-18 months and solar is on my list of upgrades id like to add to the mortgage.

So roughly how much would you say a 5kw system would set me back for all the components?

I would love to build and install my own 15-20kw motorized sun tracking Solar array with battery banks and also supplement it with wind generation. Id probably do it in phases, start out with 5kw and slowly add on as funds allow. Geothermal heating and cooling is also on my list, as well as...

I thought there was now regulation in some states that they had to buy back electricity at the same rate they sell it.