How many Solar Panels required for running 2 hp motor pump

joshiashayjoshiashay Posts: 1Registered Users
I want to know how much energy required to run 2hp pump on solar panel?
How many energy is generated by single solar panels and how many panels required for running 2 hp pump 6 hrs per day

Comments

  • BB.BB. Posts: 27,882Super Moderators, Administrators admin
    Welcome to the forum Joshiashay,

    Can I ask you a few questions? First, do you need to pump only when the sun is shinning? If so, you can avoid a battery bank, inverter, and solar charge controller... This will save something like 50% to 75% of the installation and operating costs of the systems. Batteries tend to be expensive, and only last 5-7 years, and need maintenance.

    There are pumps that are designed to connect directly to solar panels. And becoming more common are "VFD" (variable frequency drives) that take solar power in and make 3 phase power coming out.

    For larger systems (2 HP is pretty large), you are generally better off using a VFD type unit and 3 phase pump. The direct attach pumps are generally in the ~1 HP range and, while very nice pumps that will last many years, they are not cheap--And may not be easy to get in your region of the world (India?).

    Some discussions about VFD (Variable Frequency Drives)... Basically a variable frequency inverter with (typically) three phase output. Used to soft start motors (handy for 3 phase well pumps, or pumps with well head starting capacitor) and can also turn an AC motor into a variable speed motor (very handy for pumping applications).

    WELL PUMP and Inverter QUESTION

    http://forum.solar-electric.com/showthread.php?15680-Wind-solar-for-large-scale-pumping-etc-(out-of-my-depth!)
    could use knowledge - using Gould jet pump - transfering from 230vAC to ? DC (new link/thread 10/27/2012)
    Help required to design off grid system

    Your thoughts?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • Dave AngeliniDave Angelini Posts: 4,006Solar Expert ✭✭✭✭
    Here is a Grundfos at the store here. 71 gallons per minute at 100 feet of head. I shipped one to India but they were available there.

    http://www.solar-electric.com/wind-and-water-products/sodcwapu/grsoposuwapu/grsqpu/grundfos-sqflex-40-sqf-5-solar-pump.html

    It will only run when there is good sun unless you use a generator. I think we used a 300Vdc array and 2KW to get the voltage up. It could have been less solar. The more solar power, the higher chance that this will work in marginal weather.
    "we go where power lines don't" Sierra Mountains near Mariposa/Yosemite CA
     http://members.sti.net/offgridsolar/
    E-mail [email protected]

  • softdownsoftdown Posts: 1,889Solar Expert ✭✭✭✭
    Think I might use a generator for that chore.
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • Dave AngeliniDave Angelini Posts: 4,006Solar Expert ✭✭✭✭
    And there are those who do not want more "chores" than the minimum B)
    "we go where power lines don't" Sierra Mountains near Mariposa/Yosemite CA
     http://members.sti.net/offgridsolar/
    E-mail [email protected]

  • softdownsoftdown Posts: 1,889Solar Expert ✭✭✭✭
    Living off the grid has so many chores that plenty of exercise is almost assured. Most of the time....I like the life style. But I sure do miss satellite TV, good internet, and a phone that always works. A lot of developed countries really accommodate country livers. USA? Closing the post office's.....essentially slashing the throats of country and small town residents in many ways.
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • BB.BB. Posts: 27,882Super Moderators, Administrators admin
    Note:

    The links in my above post are presently broken (after the forum software upgrade).... Vanilla support is working on the problem.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • bharadwajbharadwaj Posts: 1Registered Users, Users Awaiting Email Confirmation
    I would like to. Know how many solar pannels may be required to run a 24v submerged motor??
  • mcgivormcgivor Posts: 2,199Solar Expert ✭✭✭✭✭
    Welcome aboard, firstly it's better to start a new discussion including all the details of what you propose to achieve, the details of the motor, a 24V motor is not much to go on, you need to provide at very least a current requirement and what the motor actually dose, without details nobody can answer your question.
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery bank 

  • softdownsoftdown Posts: 1,889Solar Expert ✭✭✭✭
    Things are a bit slow today so I'll play around here. This isn't really a panel equation. Inverter size is the biggest question along with wire sizing. 2HP is a beast of a pump, I think, for sure, 220/240 volt with ~~ #6 wiring. 220/240 volt means two inverters and they may have to be big ones such as is available from Magnum Energy.
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • BB.BB. Posts: 27,882Super Moderators, Administrators admin
    Do you have a 24vdc solar motor controller picked out?

    -Bill


    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • softdownsoftdown Posts: 1,889Solar Expert ✭✭✭✭
    You know things are slow when we play with a two year old post.
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • BB.BB. Posts: 27,882Super Moderators, Administrators admin
    bharadwaj is a new poster (yesterday). I will move to his own thread once he come back and gets used to the forum software.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • softdownsoftdown Posts: 1,889Solar Expert ✭✭✭✭
    12 volt motors can be used on 100' wells though the volume is "kind of small". I would surmise that a 24 volt pump could work on a 200' well with similar volume. Seems like the wiring should be pretty large in either case. 
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • Sarbajeet_1Sarbajeet_1 Posts: 1Registered Users
    I have an .75 HP submersible pump at 150 fts below and I want to run it through solar panels. Kindly suggest me on the below mentioned pohints
    1. Solar power requirement
    2. Do I need a VFD to run it. Is it cost efficient to use vfd If yes then availability of vfds for this range.
    3. If I want to go for back up system for night time then panel, inverter and battery capcity
  • BB.BB. Posts: 27,882Super Moderators, Administrators admin
    Is this a 0.75 HP pump (not a 75.0 HP)?

    Ideally, you want a 3 phase motor to run with a VFD, or, at the least, a single phase capacitor start 3 wire motor with an external (top of well head) capacitor. Franklin Electric, I believe, has a unit available:

    http://www.franklinwater.com/products/drives-protection/agindustrialmunicipal/variable-speed-p-series/

    But this is a (I believe) AC unit only (not solar).

    Here is their pump catalog (including 3 wire single phase pumps--This is for AUS/NZ, so it is metric--hope that helps)::

    http://www.franklin-electric.com.au/media/6902/fe624-2011-50-aim.pdf

    Ran across a nice document on water pumping and VFD (non-solar):

    https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs144p2_054026.pdf

    Here is an example of a solar VFD for running 3 phase pumps:

    http://www.gozuk.com/solar-pump-inverter.html

    China is making a lot of Solar VFD systems now--I do not have any information on them other than when they pop up on searches.

    If you only have a 2 wire single phase pump--I believe you will have to remove the old pump/motor and replace it with (ideally) a three phase motor, or get a (not cheap) "solar powered" pumping system (integrated solar VFD + motor).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • jaddu1949jaddu1949 Posts: 1Registered Users, Users Awaiting Email Confirmation
    I want to use solar panels on rooftop to extract loose water nearby canal from 30 feet depth. I do not want to use batteries or to convert it to AC. Can I take water by DC motor and please suggest that what type of system is better. Extract of water is sufficient during Sun time. Plz also suggest that how may panels to be used for 8.5 HP DC motor and its size. This is for Agriculture purpose for 7.5 hectors. 
  • EstragonEstragon Posts: 2,838Registered Users ✭✭✭✭✭
    To give a simple answer to a complicated question, 1hp = ~745w. 8.5x745 = ~6.3kw. Depending on location etc, you'd need ~8kw pv array.

    Panels put out ~150w/sq.meter. 8000/150 = 54 square meters. A common mount would be ~2m high, so ~27m long (roughly 7' by 100' array).

    This is just to give you a sense of the order of magnitude solar array involved.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • vicbennettvicbennett Posts: 1Registered Users
    edited February 6 #19
    Hi, my well pump is a grundfos 22sqe - 1.5 hp - 220v, single phase. It is used to irrigate presently. well depth is 95' . What am I needing to run it totally on solar with a potential to switch it over to my AC line if the sun does not shine?
    Vic
  • mike95490mike95490 Posts: 7,899Solar Expert ✭✭✭✭
    That's going to be very expensive.   Since it's for irrigation, it will be running for several hours in daylight. No hope of running it after the good solar hours, for more than a couple minutes.
    A guess it will consume about 3kw running, and much more current for starting.
    here's my guess, to provide enough power for 5 hours of prime solar
    5Kw of PV panels, mounting racks, combiners, breakers, wires .....
    60A MPPT charge controller
    48V battery bank 300ahmin capacity [3kw of load, 300ah of battery for ripple buffer and a few minutes of carry-over from clouds)
    6Kw inverter
    backup genset (or grid)
    OR
    Convert the pump to a Grundfos FLEX series pump.  It's an expensive pump, but can run direct off solar panels (or AC grid power) and no other gear other than it's control box.   Much less expense and bother than a battery based system
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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