The Many Uses of a Solar Power Water Pump



One of the best uses of a solar power water pump is in swimming pools and wells. Imagine if you can trap the sun’s energy and use it to fill your wells, reservoirs or swimming pools, wouldn’t it be great? But before you dive into this, make sure you plan your whole project out properly. You’ll save a bundle by performing an energy audit then do your best to conserve. Every dollar you can conserve will save you five times that amount in the initial solar outlay. So carry out your due diligence before starting anything, it will help you in the long run.

Typically a solar pump is a great asset in remote areas where they can be used to fill wells. They’re relatively inexpensive since you don’t need to invest a lot in laying power lines to your location. Power lines are not just expensive but they’re ugly too. So you’ll benefit on both counts. Another benefit of a solar power water pump is that you can heat your pool using the sun’s energy.

A solar pump has plenty of applications and its components are pretty much constant. You have water pump, a photovoltaic cell and a bunch of pipes and tubes. The PV cell is used to power the DC pumps directly or can be used to charge batteries. These batteries can be used to power the pumps on cloudy days or nights.

The solar power pump will work almost anywhere as long as you have a source of clean water and ample sunlight. You can draw water from a creek, a lake or a river. You can see that the opportunities with the solar power water pump are practically limitless.

Typically, during the sunny times, the pump will fill water into a storage tank. In residential applications you’ll find this is a tank on the roof. The benefit of having the tank on top of the house is that whenever the tap is opened, the water will directly flow down due to gravity. In other places like lake cabins where you’re drawing water from a river or a stream the pump can directly force the water to the taps.

As stated before though, you need to know which pump to purchase. The table below is a good reference that you can use to calculate your needs.

Solar Power Water Pump Specifications

Head Pressure
Wattage
Daily Output in Gallons
3.3 ft.
80
1,500
9.8 ft.
80
1,300
23ft
80
600
3.3 ft.
115
2,100
9.8 ft.
115
1,700
23 ft
115
650

When designing your solar system, you need to look at two variables – average water usage and peak water usage. Typically the season will determine these variables so you need to plan for this.. Another factor is the amount of sunlight you receive and the amount you need to ensure a continuous water supply. Obviously if your area gets droughts you’ll need to plan for this and get a better storage system.

If your calculations show that the sunlight is not powerful enough but your water needs are high you’ll need a larger PV cell and a larger reservoir. This way you’re addressing these limitations.

The solar power water pump that you install needs to be able to push the water to your reservoir so plan for the height difference from the pump outlet up to the height of your storage resevoir. If the height difference exceeds 100 feet you’ll need a more powerful pump to handle the demands. The table above will help you with the calculations.

If you do the calculation you’ll find that typically a 80W PV with the pump would cost you around $1400 while a standard electric 115W PV panel for around $1600. Now you also need to add in the cost of pipes and tubes. You’ll also need a float switch to shut down the pump when the reservoir is full. This way you can conserve more water.

You can see that installing a solar power water pump required detailed planning, but if you get it right you can save a lot of money in the long run while ensuring an uninterrupted supply of clean water.


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