Question by : How to run 15 kW motor from solar power system?
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?
Best answer:
Answer by Will T
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.
What do you think? Answer below!
If you’re doing a solar power system of that size (15,000 watts)
it is helpful in a oil rig project for back up ; Saudi, and Alberta Canada are good places
The technical part is mega and you definitely need installing engineers for the set up
Sorry, it is beyond homemade solar power system
3 comments
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GABY says:
April 25, 2012 at 4:43 pm (UTC 0)
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.
roderick_young says:
April 25, 2012 at 4:45 pm (UTC 0)
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.
flossie says:
April 25, 2012 at 5:25 pm (UTC 0)
You’d need a solar panel the size of Arizona.