Water pumps that are specifically made for solar

Photovoltaic (PV) panels generate electricity directly from the sun's light, with no moving parts. They may be mounted on a fixed structure or on a solar tracker, which follows the sun to extend daily operation. The solar array may be mounted some distance away from the water source. Most systems are designed to pump only during the daytime to fill a storage tank or pond. This is usually more economical and reliable than using batteries. Solar Spring systems use an electronics device to connect the photovoltaic (PV) panels directly with the pump motor, eliminating the need for inverters and/or battery storage, but they also work with batteries and with wind generators.

If your water source is far from a power line, add up your long-term costs of fueling and fixing generators, repairing windmills, etc., including time and transportation to well sites. Now consider the savings with a pump that runs on sunshine and only needs attention every 5 to 10 years.

Pump sizing read more....

Photovoltaic modules

Any combination of photovoltaic panels with a nominal power of up to 360Wp placed in series or in parallel can be used with the Solar Spring pump. Voltage can be anywhere between 24V and 80V. Direct current is fed directly from the photovoltaic panels ( or through batteries) to the pump motor. Neither inverters nor batteries are necessary.

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The Controller

The patented Controller provides a surge to start the motor and boosts the current in low sun conditions to prevent stalling. Its simple and robust circuitry is placed in a watertight enclosure, which is usually fitted behind the photovoltaic panels. The controller is fitted with wires enabling float switches to be connected

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Solar Spring Pump

Inside the patented Solar Spring pump there is an oval cam-shaft, which drives two large horizontally opposed pistons, which operate over a very short single action stroke. The pump mechanisms are bathed in non-toxic oil and are separated from the water in the system by means of stress-free gaskets. The pulsating flow of the single action system is made smooth by an internal damper and by the use of flexible drop pipe. All parts of the pump work within their normal materials stress levels to a depth of 150m (450 ft).

The DC motor. The specially developed 4-inch permanent magnet DC motor works efficiently at variable speeds. A brush type motor was chosen for reasons of efficiency, reliability and economy (brush less motors need complex electronics). Motor brushes, with normal solar daytime use, usually last 4 to 7 years. They can be replaced within a few minutes in the field without dis-turbing the wiring. The motor can turn at from 0-3000 rpm and is optimised to work best at 2000rpm

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	*Dansk Solenergi RI ApS Danish Solar Energy LTD - HEM PV** Phone: +45 3943 7767 - Fax: +45 3943 7768 - Email: sale@dansksolenergi.dk Glückstadtsvej 2 - 2100 Copenhagen - Freeport