[oil pan 4]

The land may not receive a bid because it may not have oil or be economical to extract oil from, it may be too difficult to get to, the terrain may suck, there may not be any roads, no accessible electricity, it may be too far away from the market.
Some of it may be in Alaska, which means it's useless for solar at least several months of the year. Some of those other factors effect solar farms such as no truck access or no near by power lines.

A good rebuildable energy site needs to have a few things.
Most importantly an abundance of the free energy desired, solar, wind, geothermal, hydroelectric. It needs to be big truck accessible, concrete truck accessible, there needs to be a market or transmission line tie in near by and the land needs to be obtainable by purchasing or lease. Same goes for the power lines.
If a hundred miles of power lines need to be built the budget for the power lines starts to be the bulk of the cost.
The longer the power line, the bigger the farm the more nimby useful idiots get activated.
Another problem is if the area is too far away for a concrete truck to get to that will at least quadruple your concrete bill.