Grundfos SQFlex Pump Components

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Grundfos SQFlex Solar Water Pump Components We have put together a dedicated section of all the components we generally specify to go with your Grundfos Sq Flex Solar Water Pump. The first step (using the chart below) is to calculate the nunber of solar panels you will need to provide the desired flow rate at your vertical head lift. The left column shows total head in feet and meters, the top row shows array wattage/number and suggested type of modules, and the boxes show seasonal pump performance and maximum flow. Select the row with the head (total lift) that most closely matches your application then move across the row to the column that contains the desired daily volume or peak flow rate. Note the grundfos SQFlex Solar Water pump model in that block and wattage of the PV array in that column. NOTE: Daily volume and flow calculations in the table are based on Fresno, CA data at a 36° fixed tilt. Daily summer volume assumes 7.8 kWh/m2/day of insolation and winter volume assumes 4.7 kWh/m2/day. These figures will need to be adjusted to the local insolation conditions at the actual installation site. Most solar water pumping systems will provide significantly more output in the summer than in the winter. The typical flow rate is calculated at 800 W/m2 and can be up to 25% greater under bright conditions. Also, up to 40% more water can be pumped in the summer if the array is on a tracking mount. The output can vary by location and weather patterns, and is not guaranteed. HEAD MODULE WATTS 260 WATT 60-CELL MODULES X # of modules 2 3 4 5 6 7 = Array watts 520 W 780 W 1040 W 1300 W 1560 W 1820W 6' (2 m) Model 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 7.8 kWh/m2 24885 gpd 31609 gpd 37627 gpd 42809 gpd 46335 gpd 49272 gpd 4.7 kWh/m2 19944 gpd 26177 gpd 31410 gpd 35264 gpd 38204 gpd 40675 gpd Max flow 42 gpm 52 gpm 61 gpm 68 gpm 73 gpm 77 gpm 25' (8 m) Model 40 SQF-3 40 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 60 SQF-3 7.8 kWh/m2 13027 gpd 20089 gpd 26345 gpd 31950 g