SUNRNR of Virginia, Inc.
Renewable Energy ... Anytime, Anywhere

Run A Well Pump Using Stored Solar Power

solar powered well pumpFig 2c – AC End 240VAC/60Hz inverter (SUN240, “well pump”)
A. ON/OFF Switch
B. Over-temp LED Indicator Light
C. Over-load LED Indicator
D. Battery Voltage & Inverter Output Wattage Bar Graph Meters
E. Two AC Universal Outlets (3000W max continuous)
F. AC Terminal Block for Hardwiring 5000W Output

1 hp = 746 W 

Well pumps and their power requirements are a highly complex issue:  2-wire, 3-wire, neutral, amperage, run time, soft start, head, horsepower,...

As a very rough starting point with no promises and possibly underestimating capability, a SUNRNR SUN240 is 60Hz and will run a 1hp water pump or 1.5hp compressor using the conversion equation above to estimate run time available.

Call 540-271-3403 with your pump's specifications and we will provide a thumb's up or a thumb's down.  We'll be asking for horsepower and depth, but what we really need to know is the "AMP DRAW" both at start and while running and the run time of a pump cycle.  You may need to ask an electrician (or an electrically-inclined associate) to come by to take readings and get these numbers.

The Continuous Usage Table may also be helpful here, showing it is possible to get ~1400W/day or ~2hrs run time of a 1hp pump.


NEMA plug for electrical panel connectionWith the help of a certified electrician and this PS5466-X plug, you can manually transfer the powering of your well pump from the grid to your SUN240.
NEW!  We turned the Table mentioned above into Charts for our more-visual customers!

Daily Maximum Power Output – One SUNRNR, Two Panels, 6 hours moderate sunshine each day

These charts show examples of using the full 3500W power output capability of the inverter while saving enough power to remain sustainable (each day similar to Day 1).  In the first one, usage is spread throughout the day like a residential well pump providing water at varying intervals, especially in the morning.  At this rate, even a small 10 gpm pump could provide 240 gallons of water.  The second chart applies to an application where full output power would use all the available (and still be sustainable) stored power over a period of 25 minutes once a day. 

Solar-powered well pump run time

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