Solar vs Diesel Calculator
Diesel power is used extensively to around the world either with direct diesel pumps or by using diesel generators and AC pumps.
The case for replacing diesel with solar pumps has been clear for many years. The price reductions of PV over the last 5 years plus the continually increasing costs of diesel means that the economics get better every year.
The initial costs of solar are now not much closer to diesel power for new installations. There is normally a break even within one year when comparing solar with diesel in these cases.
For sites that are currently using diesel the economic arguments are very strong. Diesel has increased by an average 15% per year for the last 7 years.