Ian

Great, I'll do what you say. Thank you very much! :)

Hi everyone, I have a question regarding the maximum current a pump needs in order to add it to the database. The thing is that pumps need more current to start working, so I am not sure if when asking the abs. maximum current I have to write the maximum current of the three-phase running (for example 5.7) or this current with the increment of the 400 % that needs to start working (22.8). Thank you!!

Hello everyone! I'm stuck with a problem in pumping systems. The suggested pump and PV powers are 2.2 kW and 2.8kW each. I am using solar panels of 370 W and 34 V, so I have to put a string of 7 panels. The program recommends me to put 2 strings, so I'll have 4.7 kW max. Ok then I choose an inverter of 3 kW but I can't cover the water needs, so I decide then to add another string, having 7kW (max), but then less water is pumped. WHY???? If I use only one string, more water is pumped than if I use 2 or 3. Why is this happening???? Also if I use an inverter of 2.2 kW, the water needs are covered with 2 strings of 7 panels, but I don't understand why using a 3 kW inverter (only changing the inverter, not the panels) with the same operating conditions (mppt conditions and maximum voltage conditions) makes the system pump the half of the water. The threshold difference is only 8 Watts. Thank you!!

Hello everyone! I'm trying to add a new pump to the database, as I need to use it in my project. The thing is that when I start to draw the curve "Head=f(FlowR), Voltage = 400 V", an error appears and PVsyst stops working. I do not know what to do. I even tried to copy the parameters of other pumps included in the database to be sure that the numbrs are OK, but I still have the same problem. Hope anyone could tell me what to do Thank you so much!!