With the increasing cost of energy from the grid, the option of using renewable energy for pumping is becoming more attractive. Renewable energy driven systems have been installed for applications as varied as household pressure pumps to large cotton farms (with diesel backup). Careful analysis of system requirements must be made to ensure energy generation capabilities of the system are sufficient, and that the installation is cost effective. Renewable energy driven systems incur higher capital expenditure, but can provide savings in the long term from reduced energy and maintenance costs.