The Sun Pumps SDS series of diaphragm submersible pumps is meant to offer an affordable solution for the solar water pumping industry. Constructed of 316 stainless steel and/or ryton, the pumps are extremely durable and corrosion resistant.  They operate on 12v to 30v DC that may be supplied from solar panels or batteries.  Flow rates range from 0.4 to 4.8 gpm, depending on water depth and model selection. The submersible pumps are ideal for providing water to off-grid homes, campsites, livestock, and small farms.