how to connect these solar panels for solar pump?

aymanayman Registered Users Posts: 1
Hi every one,

we have this pump and we need to know how to connect the panels (350 watt panels) as per the attachments.
pump:
Power max. 1,8 kW
Input voltage max. 200 V
Optimum Vmp** > 102 V
Motor current max. 14 A

Panels:
Max power (W): 350
open circuit voltage voc(V): 48.2 
short circuit voltage isc(A): 9.66 
Voltage at Pmax vmp(V):  39.3
Current at Pmax imp(A): 8.91
Module efficiency -nm(%): 18.1



Comments

  • BB.BB. Super Moderators, Administrators Posts: 29,803 admin
    Welcome to the forum Ayman,

    Can you tell us a bit more about the pump motor?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • icarusicarus Solar Expert Posts: 5,389 ✭✭✭✭
    If I am reading your pump specs properly (1.8KW/ 102-200v(dc?) 14 amps,  you said described PV is not likely to drive that pump by themselves.  The PV themselves, wired in series would only put out something like ~100-120 vdc at ~8 amps.  You have 1.8 kw of load, while only having ~1050watts of pv.  Under the BEST circumstances that PV might put out ~800 watts, leaving you 1kw short...unless I am not understating your specs properly.

    Tony
  • jonrjonr Solar Expert Posts: 1,345 ✭✭✭✭
    Most solar pumps will simply run at reduced output when there is less than rated watts (eg, 3 panels in series).  But more info is needed.

    I am available for custom hardware/firmware development

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