Designing of off grid solar system

[russ]

Dereck, your use of "moron" in this case is both insensitive and a slander on morons.

Goof one! In Argentina the term is jarco - meaning dumber than dumb - not that anyone cares

[Sunking]

Dereck, your use of "moron" in this case is both insensitive and a slander on morons.

Tell you what I will give you a dime so you can call someone who gives a chit.

[inetdog]

I think we tarred and feathered this moron imposter a couple of years back and he has not been back since. Learned his lesson to never come here again.

Dereck, your use of "moron" in this case is both insensitive and a slander on morons.

[Sunking]

@ wedgeantilles If you have not run this sort of high power system, please refrain from advising neophytes un-tested theory.

There is no practical way to run a 5 hp 3 ph pump from a small or moderate solar system. You are better off getting a generator to run it. It WILL NEVER run directly off solar panels, without a VERY expensive system, and then, only in full, bright sunlight for a couple hours only.
engineering (best case) 750watts = 1 hp. That's 3750 watts, in a perfect, loss free system, and much more in real life.

I think we tarred and feathered this moron imposter a couple of years back and he has not been back since. Learned his lesson to never come here again.

[Mike90250]

Dear sir,
For the 5 HP pump, you can use amorphous panels, just connect series of them to have the grid voltage ( if it is 230 V 50 Hz, I don't know) you will need 230*SQRT(2)=330 Volts aprox. Then connect others series in parallel to reach the amps needed.....

@ wedgeantilles If you have not run this sort of high power system, please refrain from advising neophytes un-tested theory.

There is no practical way to run a 5 hp 3 ph pump from a small or moderate solar system. You are better off getting a generator to run it. It WILL NEVER run directly off solar panels, without a VERY expensive system, and then, only in full, bright sunlight for a couple hours only.
engineering (best case) 750watts = 1 hp. That's 3750 watts, in a perfect, loss free system, and much more in real life.

[syedbukhari]

For the 5 HP pump, you can use amorphous panels, just connect series of them to have the grid voltage ( if it is 230 V 50 Hz, I don't know) you will need 230*SQRT(2)=330 Volts aprox. Then connect others series in parallel to reach the amps needed.

Then connect the output from the solar pannels to the DC input of the VFD and you have it, connect the electrical motor in a star configuration if it is rated to 230 V star. The VFD will do the rest.

Wedge.

I try this and it works vey well but the only problem is that we have to adjust the frequency manually. Vfd do not control the frequency as the radiations goes up and down.

Kindly also guide is it possible that VFD itself control the speed of the motor as the radiation varies.

Many thanks for your battery less solution suggestion.

[russ]

@syedbukhari, How can i contact you?, shah jee.

Have the discourse on the site for all or not at all.

[Mian Jee]

what will you suggest if i run this pump without batteries.
About inverter size and array setting
220 volts are used in Pakistan
frequency 50 hertz

@syedbukhari, How can i contact you?, shah jee.

[inetdog]

What a joke. I get it though.

It's not a joke! (well, not entirely...)

[Sunking]

Dear sir,

For the 5 HP pump, you can use amorphous panels, just connect series of them to have the grid voltage ( if it is 230 V 50 Hz, I don't know) you will need 230*SQRT(2)=330 Volts aprox. Then connect others series in parallel to reach the amps needed.

What a joke. I get it though.

[wedgeantilles]

Solar Pumps

I think I failed to present my point of view
In case of agri pump I am not interested to run this on batteries,i just wants its working in day light with the help of inveter . There is no need of batteries. Yes I need batteries in home and fuel station model.

Dear sir,

For the 5 HP pump, you can use amorphous panels, just connect series of them to have the grid voltage ( if it is 230 V 50 Hz, I don't know) you will need 230*SQRT(2)=330 Volts aprox. Then connect others series in parallel to reach the amps needed.

Then connect the output from the solar pannels to the DC input of the VFD and you have it, connect the electrical motor in a star configuration if it is rated to 230 V star. The VFD will do the rest.

For providing a better control use a LDR (Light dependant resistor, in a voltage divider) connect the voltage divider to the DC source included with most of the inverters, and the output to the potentiometer input of the VFD. The VFD will control the frequency depending on the solar light falling into the LDR (the LDR must be at the same place as the amorphous panels, same orientation and inclination). Thus you will have more pumping hours, but don't be confused, less frequency lower water flow. And this has a limit, when there is not enough power the VFD will stop the motor. You will have to change some parameters in the VFD, in order to automatically restart the motor, in case there are some passing clouds. Only if there is no life threatening due to motor automatic restart.

I will be delighted to hear from this if you try.

Good luck!!!
Wedge.

[Mike90250]

OK I am going to help you out here and give you exactly what you want.....

No, you are giving him exactly what he asked for He WANTS a 30 w panel, and an $60 pump


Dude ! 5 horsepower is a LOT of energy. That is a big pump. It will take a LOT of solar to power it.

[Sunking]

Real thought here.

What are wind conditions like?

[Sunking]

what will you suggest if i run this pump without batteries.

Get a lot of buckets and slaves to pump and carry the water where it needs to go.

[Mike90250]

what will you suggest if i run this pump without batteries.
About inverter size and array setting
220 volts are used in Pakistan
frequency 50 hertz

You only have 2 choices:
generic Grid-Tie (batteryless)
or
Off-Grid with batteries, PV and inverter that Sunking listed

Panel wattage = 9600 watts divided into 3 systems of 3200 watts each with its own separate Charge Controller
Battery capacity configured @ 48 volts = 3000 AH, approx weight = 9000 lbs or 4100 Kg
Charge Controllers = 3 units 80 Amp MPPT
Inverter = Industrial Grade 10 Kva

As far as I'm aware of, there are no DC/PV pumps of this size. Ther are small DC pumps, with MPPT controllers, but you would need dozens of them, at terriffic expense each, and their own PV arrays. Look up Grundfos SQflex pumps

http://net.grundfos.com/doc/webnet/sq_flex/int/index.html