The cost of solar energy has declined nearly 90% over the past two decades, and research suggests that the price will continue to fall.

Cost of remanufactured and reconditioned products may vary. For example, wind turbines vary in cost depending on whether you choose a remanufactured, reconditioned or new turbine. The cost of New turbines in this size/class, 40kW to 600kW, usually in the range of $1,700 per kW.

The main reason why there are not more takers for using solar power for home use is that the costs of installation are too steep. In the USA it is estimated that to upgrade the transmission system to take in planned or potential renewables would cost at least $60 billion.