posted on Jul, 29 2014 @ 11:00 AM
a reply to: eriktheawful
Hello, my name is Mike, I am with Rural Power Systems linked above. I noticed the traffic our store and thought I would chime in and see if you have
any other questions.
If you want to run a pressurized system off of a solar well pump you have a few options.
1. Install a separate DC booster pump with battery backup and its own solar panel which pressurizes the bladder tank from a separate storage tank.
The well pump fills the storage tank during the day, and the booster pump keeps water pressure throughout the day and night. The booster pump is much
lower power and does not have to pump water from deep underground to maintain pressure. Therefore it does not require quite a large battery bank to
make it through the night. Most people can get by with one gel cell for a 12V booster pump.
2. Add battery backup to one of our systems. We offer optional controllers with battery backup and battery charge controller for all of our systems.
You will also want to add a bit more to the wattage of the solar panels, as they will have to operate and charge the system batteries during the
daytime. Using the current rating of the pump and the estimated nightly run time, you can figure out the battery bank required to make it through the
You will also need to substrate 2.3 feet of pump capability for every 1 psi you want to pressurized the tank. For example with 120 head and 40 psi,
you would need a system capable of pumping a minimum of 212 feet referred to as the "total dynamic head."
3. Use an AC to DC power converter to run off of main power during the night and feed into a controller with battery backup. The converters cost
about $200 and you most likely would want to put a diode in series to prevent the controller from trying to charge the controller. This would be a
very robust system and could pump rain or shine, night or day.
While you need to think ahead to plan out your system, once complete they are very capable and robust systems. They are modular in case you need to
replace a specific component or add more capability in the future. I always recommend to purchase the basic system, set it up and try it for a few
days. If you need more water, additional solar panels can be added with batteries for increased performance.
Please let me know if there are any other questions or anything else I can help with?