East Coast Solar, Inc
D5-STRONG Laing D5 STRONG Bronze PV-Direct Circulating Pump
The first DC spherical motor pump for direct connection to photovoltaic panels with automatic performance optimization using MPPT technology (Maximum Power Point Tracking)
The principle of the spherical motor, which was invented by Laing, is fundamentally different from conventional canned motor pumps. The only moving part in a spherical motor is a hemispherical rotor/impeller unit, which sits on an ultra-hard, wear-resistant ceramic ball. There are no conventional shaft bearings or seals. This rules out, in effect, the possibility of play in the bearings and the increase in noise associated with it. These pumps are particularly robust and give exceptionally long service. The self-realigning bearing is lubricated and cooled by the media. Maintenance is not necessary under normal conditions and even after lengthy shutdown periods a reliable start-up is virtually guaranteed. The parts exposed to the fluid are completely corrosion resistant.
The pump has been programmed for a soft start-up. When the photovoltaic panel provides sufficient power, the pump first goes through the alignment phase, turning the rotor into the position required for start-up. Then the processor waits until the built-in capacitor has recharged sufficiently. This enables a start-up with minimal power (less than one Watt!). Cycling due to unsuccessful starting attempts is minimized. Even after prolonged shutdown, the pump will start reliably.
Automatic performance optimization
– MPP tracking The Ecocirc DC pumps are the first and only spherical motor pumps with self-optimizing software (see diagram). Every three seconds, the processor will modify its operating point on the voltage-current curve of the PV panel to find the point of maximum performance. This is called the “Maximum Power Point” (MPP).
List price $273.00 ~ You save $93.05
Model D5 STRONG Options
D5-STRONG/090B Union CK Valve $28.00
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