Solar Kit for 7.5hp motor

[vineeth]

Hi All,

I want to run 7.5 hp motor for my agricultural requirements through Solar Energy can any one suggest me the type of inverter to be used, i want to know the inverter specification required to run my motor pleasr help how to calculate the the wattage of the inverter for my requirement

[Sunking]

You are going to need a truck load of batteries, panels, and charge controllers first, then a custom built inverter. You are looking at a 10 to 15 Kwh 3-phase industrial grade inverter operating at 200 + volt battery. How much money do you have?

[Mike90250]

You are going to need a truck load of batteries, panels, and charge controllers first, then a custom built inverter. You are looking at a 10 to 15 Kwh 3-phase industrial grade inverter operating at 200 + volt battery. How much money do you have?

exactly what he said !

[vineeth]

I am ready to invest around Rs 1.2 lakhs INR, so is it possible that i can purchase a kit for this amount

[russ]

I am ready to invest around Rs 1.2 lakhs INR, so is it possible that i can purchase a kit for this amount

About 2,400$ US - won't even make a start unfortunately

[vineeth]

How much it might cost , i dont want battery backup if my motor runs for 8 hours through solar during the day that is sufficient and also can anyone hepl me to calculate the number of panels required for 5kw inverter with MPPT ranges from 450 - 800V , how to decide the number of panels required technically, if i am using 240w panel what shoud i consider in the specification if i need to do this calculation .Please help.

[Mike90250]

You need about 15 - 20 KW worth of panels to run the motor, along with a trailer mounted inverter. You will also NEED to have GRID power at the site, or batteries. It can't be done without either GRID or Batteries.

20,000 / 240 = 85 panels. If they all run at 100% of spec.

Here are some inverters that work with solar, and surplus power is fed to the grid. If you size the system properly, the only monthly cost is the grid connection fee, maybe $100 monthly.
http://www.keyitec.com/keyitec-3PhSolar-Inverters.html These are not inexpensive !

[Sunny Solar]

in reality you would need about 110 panels, Panels never reach spec in normal outdoor conditions. Ans even if you did get some that did or had conditions to make it possible you never get perfect clear sky all day,,One tiny cloud over the panels and output will drop up to 50%.Heavy cloud even more.

[sreeindia]

Hi All,

I want to run 7.5 hp motor for my agricultural requirements through Solar Energy can any one suggest me the type of inverter to be used, i want to know the inverter specification required to run my motor pleasr help how to calculate the the wattage of the inverter for my requirement

for 7.5 Hp minimum you should invest 8 lakhs INR
There is no inverter for pump/ motor side. Drive is called Variable frequency Drive. this drive will work with solar pannels without batteries 5 to 6 hours maximum
So many pump drives are there in india

For 7.5 HP you required 7500watts solar pannels are required
DC input Voltage 600 vdc to 700 vdc require
Current minimum requirement is 9 amps

(way to go about calculating it:
one horsepower is about 750W (actually closer to 745.7 but 750 is close enough for what we are doing) 7.5 * 750 would be 5625W, but while electric motors are quite efficient, they are not 100% efficient, so lets make that 6000W
Since it is three phase we need to divide that number by the square root of 3 to get the power per leg. 6000 / 1.73 = about 3500
dividing 3500 by the supply voltage will give the current that is doing work.
For example if the supply is 480V, 3500/480 = 7.3A
But a motor is a reactive load and the power factor will be less than 1 so the get the actual current in the wire divide the number above by the power factor. There actual power factor depends on various factors, for a rough estimate we might use 0.85, giving a line current of 7.3/0.85 = 8.6A)

[krishnareddy]

solar water pumping system

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