Solar Panel Compatibility

Are my existing solar panels
compatible with RPS Solar Pumps?

To find out, send our engineers a quick email at [email protected]
with the following info:

1) Stats from the sticker on the back of your solar panels Total Power (watts), Vmp (volts), Voc (volts)
2) The total number of panels you have

View the PDF.

Solar Panel Sticker
(on reverse side under junction box)
Stats you’ll need from the sticker.

Total Power ( Pm, Watts ) 

Voltage Maximum Power ( Vmp, Volts DC ) 

Voltage Open-Circuit ( Voc, Volts DC )

Optional stats:

Current Maximum Power ( Imp, in Amps )

Short-Circuit Current  ( Ioc, in Amps )

Most Common Sizes
“12V Panels”“24V Panels”
Each panel is different
but in general..
Vmp is 16v – 20v
Voc is ~20v – 23v

Example
RPS 100w Panels
Vmp = 18.6v
Voc = 21.8v
Each panel is different
but in general..
Vmp is 30v to 37v
Voc is ~38v to 45v
Example
RPS 290w Panels
Vmp = 32.1v
Voc = 38.8v

P = I  x  V   (Power = Current x Voltage)
1 horsepower (hp) = 745 watts

RPS Solar Pump System Requirements 

RPS 200, 400, 600, 800 RPS 400V, `800VTankless Pressure PumpRPS Pro Series Pumps 
Min Solar
Array Voltage
24v DC48v DC24v DC100v DC
Max Solar
Array Voltage
72 Vmp
90 Voc 
72 Vmp
90 Voc
36 Vmp
45 Voc 
360 Vmp410 Voc 
Optimal Solar
Array Voltage
Examples Arrays
24v / 36v / 48v
(36-72 Vmp)

Examples2x 100w 12v panels in series (24v)
1x 300w 24v panel (24v)2x 180w 24v panels in parallel 4x 100w 12v in series/parallel (24v)3x 100w 12v panels in series (36v)4x 100w 12v panels in series (48v)
48v
(72 Vmp)

Examples
4x 100w 12v panels in series (48v)8x 100w 12v in series/parallel (48v)
2x 300w 24v panel in series (48v)
24v
(30-36 Vmp)

Examples2x 100w 12v panels in series (24v)
1x 300w 24v panel (24v)2x 180w 24v panels in parallel (24v)
260-320 Vmp


Examples16x 100w 12v in series (288 Vmp)10x 290w 24v in series (320 Vmp)

Pump Wattage / Coefficient  Recommend 1.3x or more
Recommend 1.3x or moreRecommend 400 Watts or moreRecommend 1.3x or more
Battery Bank VoltageMust be same as solar array voltage. (Compatible 24v, 36v, 48v)Must be same as solar array voltage. (Ideally 48v)24v OnlyNot designed for batteries. Use backup of generator or grid 1 Ph 220v.

Wiring Diagrams Common to Solar
 

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