The Solar Stream LJ-01 solar fountain pump provides a unique feature for any pond, garden pool, or business display. Powered by a 5-watt photovoltaic module, the fountain sends a stream of water 6 feet into the air two times a second in full sun. The pump is a stainless steel cylinder, 6 inches high and 3 inches in diameter. It fits into a 5-inch foam collar that allows the pump to float at the water’s surface. An 8-foot cord allows connection to the commercial grade 5-watt photovoltaic module supplied with the kit.

These pumps have only one moving part – a free piston. Electricity from sunlight (from the PV module) charges a capacitor. When the capacitor voltage reaches a fixed level (about 16 volts), an electronic switch feeds the capacitor energy into the pump coil which drives the piston, creating a pulse of water. The more sunlight, the more pulses of water are delivered.