I want to design solar power system to run 15 kW, 3 phase motor, 50 Hz for pumping purpose. I will be using batteries for back up supply from Grid supply to charge battery during solar power failure. Please suggest me the capacity of inverter that is needed to use as power supply to the motor?
I request necessary circuit diagram and equipment capacity to use for this purpose from all the members please please?
I agree, but we all need to realize that adding Solar on their property is an asset that should improve the long term valuation of their home if / when they make a choice to sell. With the environment the way it is going we are not able to disregard any system that provides totally free energy at no cost to both the client and more importantly the environment!
You’d need a solar panel the size of Arizona.
It sounds like the site has grid power, so I would stay with that.
You could then supplement the power with solar, using grid-tied inverters. There are 3-phase inverters, but you might find it simpler to just use several single-phase inverters, one or more on each leg. I see no point in using batteries, that would only add to the cost. In fact, you would only go with grid-tied solar for water pumping if you were in one of those rare places in the world where grid electricity is very expensive.
With grid tied, you will also not have to worry much about under-sizing your solar array. If you put in a 1 kW array, it won’t save as much money as a 5 kW or 10 kW, but the system will still work.
Also, if you have a choice of when to do the pumping, you can set up your controller to pump when sun is abundant. For example, if you’re filling a reservoir, fill it between 10 am and 3 pm.
15,000 Watts would take about 100-150 panels and a huge inverter to just run it during sunny times. A lot bigger (About 3-4 times larger) to produce enough to store power for night use. Seems very impractical to me.
Where abouts are you in the world?
Can you not just use electcity from the grid, and offset the power used via a feed back scheme from a solar PV array?
I should imagine an invertor of that size would double the cost of such a project.
Can’t help you on the technical side sorry.