Designing of off grid solar system

[syedbukhari]

And how many gallons per minute do you need.
does this pump into storage? or into ditches, how is the water distributed?

Flow rate is 200 GPM
Water distribution is through diches

[syedbukhari]

Shah Jee, Can you tell me the bore size & length of the tube well & type of pump you are using ?

Mian sb bore size is 10 inches,
Discharge is 4 inch
Bore depth is 30 meter
Mono block motor

[russ]

@ Naptown, Yes you are thinking right,it sounds mad, but things are much different in Pakistan than USA,

Quit with the nonsense! Things are very much the same in many ways. The design would be done the same and then local availability/conditions would be taken in to account.

[Mike90250]

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.

Then what you want is a Grid - Tie inverter. It feeds power into the grid, and will offset your pump's usage.

As for an inverter that can power a 5hp pump. It will be VERY expensive. It's likely a 3-phase motor, and consumes 6,000 watts, with several times that power needed to spin it up.

[syedbukhari]

Then what you want is a Grid - Tie inverter. It feeds power into the grid, and will offset your pump's usage.

As for an inverter that can power a 5hp pump. It will be VERY expensive. It's likely a 3-phase motor, and consumes 6,000 watts, with several times that power needed to spin it up.

I wants to run the pump from grid supply in case of emergency only. The pump will run on solar in day time it starts running from morning and keeps going till evening. The pumps takes 35 amp at its start up and settles at 15 amp at its running. It is a single phase and will run continuesly for 5-8 hrs every day. Please advice accordingly.

[Sunking]

I wants to run the pump from grid supply in case of emergency only. The pump will run on solar in day time it starts running from morning and keeps going till evening. The pumps takes 35 amp at its start up and settles at 15 amp at its running. It is a single phase and will run continuesly for 5-8 hrs every day. Please advice accordingly.

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

Based on running 8 hour per day you are going to need

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

[Mike90250]

I wants to run the pump from grid supply in case of emergency only. The pump will run on solar in day time it starts running from morning and keeps going till evening.
The pumps takes 35 amp at its start up and
settles at 15 amp at its running. It is a single phase and will run continuesly for 5-8 hrs every day.
Please advice accordingly.

240VAC @ 35A = 8400 starting watts for 5 seconds (likely much higher, but your meter can't read it)
240 @ 15A = 3600 running watts (starting is generally at least 5x this, or about 18,000watts, will need a very stout inverter, wires & batteries to supply this - 8400 w @ 48V = 175 amps starting, 75a running, from 48VDC)

[syedbukhari]

240VAC @ 35A = 8400 starting watts for 5 seconds (likely much higher, but your meter can't read it)
240 @ 15A = 3600 running watts (starting is generally at least 5x this, or about 18,000watts, will need a very stout inverter, wires & batteries to supply this - 8400 w @ 48V = 175 amps starting, 75a running, from 48VDC)

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

[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

[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.

[Sunking]

Real thought here.

What are wind conditions like?

[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.

[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.

[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.

[inetdog]

What a joke. I get it though.

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