Start with our overview video…..

Most Common Issues

Watch video below or link to specific issue in YouTube video.

00:20  Power To Controller
00:42 Title Angle, Shade and Corner Protectors
03:00 Low Well Sensor
03:38 Damaged Pumping Mechanism
04:35 Blinking MPPT Light
05:07 Low Power Cycling ON/OFF
05:51 No Lights on Controller
06:27 Reversed Pump Wires

Troubleshooting Tests

Each test is numbered from the Troubleshooting Flowchart.

00:06 Safety Precautions
00:24 Test #1 – Solar Array Voltage
02:36 Test #2 – Individual Panels
04:10 Test #3 – Pump Wire Resistances
06:36 Test #4 – Bucket Test
07:38 Test #5 – Power to Pump
09:04 Test #6 – Sensor Test
10:42 Test #7 – Switch & Resets
11:38 Hard and Soft Resets

Part-By-Part Troubleshooting

Equipment needed for installation

We include the all universal parts necessary for pump installation in your kit. But because everyone’s well and landscape are a little bit different, there are certain components that you’ll need to bring to the installation that we cannot practically provide. We do offer a ‘ Turnkey Kit’ in two sizes (100’ and 200’) on our website, which includes these additional items already assembled and packed together. This can be very convenient if you live a long way from a hardware store or are short on time. We love the DIY spirit of our customers and we’ll help you with whatever solution works best for you!

Here’s a list of the tools you’ll want to have on hand during installation:
Wire stripper/crimper
Screwdrivers (Flat and Phillips head)
Electrical tape (for attaching wire to drop pipe)
Teflon tape for tight thread connections (recommended)
Two adjustable wrenches
Heat gun or torch for heat-shrink sleeves
Multimeter (highly recommended)
Large bucket or barrel with water for testing the system (recommended)

Your pump will arrive with 6’ of cable attached. You’ll need to extend this according to your water level and installation design by splicing on a custom length of additional pump wire. To do this, use 3-strand submersible wire of at least 12 gauge. The distance between the pump and the controller will dictate the wire gauge required. In general, a larger wire diameter will ensure maximum performance:

Up to 200’ between the pump and controller, use 12-gauge, 3-strand wire.
For distances greater than 200’, optional use of 10-gauge, 3-strand wire but 12-3 is most common. 

The low water and tank full sensor each have 100′ of wire attached to the probe but you can use the included splice kit for extending your sensor wire if necessary with 16-22 gauge 2-strand wire (available in the Communications/ Home Security section of your local hardware store) following the same steps outline below. The two sensors in your kit are identical so either one can be used for the low water sensor.

RPS also carries additional pump wire and sensor wire, give us a call to order.

Use the provided splice kit with adhesive-lined heat-shrink tubing to connect your pump cable extension. Your pump comes with butt crimps pre-attached for ease of connection; we also provide 3 larger diameter butt crimps in your kit for splicing 10 gauge wire if needed. If you don’t have a heat gun to shrink the tubing, you can use a butane lighter, but make sure not to melt the insulation or set it on re. You can also use a lighter, but be extremely careful not to overheat and melt the heat-shrinks.

If you haven’t purchased a Turnkey Kit, which includes pipe, a well seal and associated plumbing,  you’ll need to provide those items yourself. Depending on the type of pipe used (poly, PVC, steel galvanized), specific plumbing fittings may be needed. Poly pipe rated at least 160 PSI or 200PSI is more than adequate for installing the RPS 200, 400, 400N, 400V, 800 and 800V.

Down Well Drop Pipe Sizing

Face panels due south for maximum performance, regardless of season and type of mount. During winter adjust for a steeper panel angle and a flatter summer angle. This increases efficiency the efficiency of panels which, in turn, allows you to achieve more pumping hours per day.  To determine what tilt angle to use for your mount, visit www.rpssolarpumps.com/tilt

Voltage Testing for Panels and Solar Panel Arrays

Before connecting the solar panel array to the RPS controller, we encourage you to check that each panel is performing properly. This check is done at our warehouse on every panel before sending out to customers, but shipping or environmental damage may have occurred since then.

Our co-owner Mike will walk you through how to test each panel individually….

Expected Voltage and Current Readings

A typical single 100W panel should fall within the following readings…. 

Vmp: 16V – 20V

Voc: 20V – 23V

Isc: 5-6.5A

These values will be different when panels are connected together in series or series parallel. Below are the values you should receive when panels are connected correctly and operating normally.

Your helical rotor mechanism is guaranteed for the lifetime of the system, meaning however many replacements you may need, we’ll supply at no cost to you. Please text our support line  916-775-8855 and tell us 1) you need a new mechanism and 2) which version you require, 3” or  2”. 

Helical Rotor Replacement for RPS 200, 400, 600, 800

Helical Rotor Replacement for RPS 400N

The RPS 200, 400, 600, 800 and 400N are all capable of using batteries as a backup source of power. The RPS 400V and 800V can technically use batteries, but we do not recommend doing so except for very low head applications. Batteries WILL NOT allow you to pump 24/7. View our calculated battery run times per system here. Our engineers always recommend first investing in more above ground water storage over the cost and maintenance of batteries. Find a storage tank that holds 2-3 days worth of your water needs, that way you have a back up in case of extended  storms/fires/overcast skies. Batteries loose charge after a few hours of pumping and if little to no sun lasts for more than a day, those batteries won’t recharge quickly. Tanks on the other hand are essentially like big water batteries  For those applications where you will already pump most of the day, the batteries will not have much of a chance to charge. We recommend properly sizing a system that can accomplish your pumping needs within a 6 hour time span (the calculated average number of sunlight hours in the US). Meaning you may pump at a higher rate of flow instead of a lower rate of flow over a longer period of time.

RPS 200

RPS 400, 400N, 800

Frequently Asked Questions

Can I connect a wind generator?
There is not a hook up available on the Universal Controller for a wind system. But we do have a solution for pairing a wind generator, and a wind controller, onto a shared battery bank. Pleas view those plans here.
Are Lithium Ion batteries compatible?
Not in a typical setup, because our charge controller can’t *charge* the Lithium ion batteries, but it can pull power from them. View our solution for Lithium Ion batteries here.

Can I power the pump with a generator or AC grid power?
Yes, but you will need one of our 110/220V converters , do not attempt to directly connect any form of backup power without this converter.

Submersible Pump Troubleshooting Video Library

Replacing OVP Diode

Maximizing Solar Panel Production

How to Measure Vmp/Voc

Dirty vs Clean Solar Panel Output

Bearing Test Tutorial

Pumping Mechanism Replacement for 400N

Necesitas ayuda? Tenemos un manual en español!