(1) Selecting the solar panel of the pumping system

If you have not purchased a complete system from your supplier, the following formulae will be useful. Your pump supplier will be

able to help you with panel selection

a. Solar PV panel (solar panel) selection

power of PV panels (watts) =Rated  power of pump (watts) x( 1. 3  ~ 1.6)

voltage of solar panel = Rated  voltage of pump (volt) x 1.5

the controller will already be matched to the pump by your supplier

eg  A 300 watt pump needs a minimum of 390 watts of PV panels to drive it (300w x 1.3 = 390w)

b. You may need combinations of panels, especially for the larger pumps. During connection of solar panels, you have to get the

solar panels in series to reach the rated voltage of the pump, then in parallel to reach the rated current of the pump

Panels in parallel double the current and the wattage of the panels

Panels in series double the voltage and the wattage of the panels

e.g. 2 x 12V/ 100 W panels in parallel →    12 V/200W system

2 x 12V/ 100 W  panels in series   →    24V/200W system

2. INSTALLATION

(1)Function of solar pump controller box

Low voltage protection(It is automatic)

Over voltage protection(It is automatic)

a.    Over current protection(It is automatic)

b.    Protection for low water level in well (WC,WH sensors)

c.    Protection for full water level in tank (TC,TH sensors)

d.    Controlling running speed of motor (Speed regulator)

e.    Delay for restart working function (Timer regulator is to be set a period of rest time after the pump stops working from low

water level protection in well)

f.     MPPT function. (Maximum Power Point Tracking)

(2) Wiring the controller box

Before you start wiring the control box, switch must be in the off position.

Wire the pump, panels to the control box as per the wiring diagram below. Both the pump and controller are labeled with “U”, ”V” and “W”.

Make sure to be correspondingly connected and not touch with each other.

Pumps, controller boxes, solar panels,connection diagram