Solar Powered Rain Barrel Part 2
Friday, June 4th, 2010

The latest project at my house was to update the design of my original rain barrel made from a whiskey barrel and the much improved 12 volt pumping system charged with solar power. This time, I buried the irrigation piping in the ground and ran the piping to the little garden we have beside the house. I finished the fence and gardening area earlier this spring. The stones for the stone walkway were provided by my dad and come from Head Spring Farm.
My goal was to design and build an environmentally friendly and sustainable irrigation system using solar power, rain water collection, and reclaimed materials. The rain water irrigation project consists of the following parts:
- A reclaimed oak whiskey barrel used to capture rain water
- A solar panel to charge a 12 volt battery.
- A salvaged 12 volt lawn tractor battery.
- A 12 volt, 3 gallon per minute (GPM) pump.
- A turn on / turn off toggle switch for easy access to irrigate the garden.
- Lawn sprinkler.
- A containment box for the pump and battery made from furniture scrap lumber.

The rain barrel is a reclaimed oak whiskey barrel. I modified the barrel to include a screen to capture debris, a ball valve for shutoff, and an overflow pipe. I chose the oak barrel for a few reasons:
- It is a reused barrel purchased from a local whiskey distillery.
- It looks more natural than plastic rain barrels.
- It captures runoff to reduce the amount of impervious surface runoff.
- It is not made of plastic like most rain barrels sold today.
When conditions are dry, I simply flip the toggle switch to irrigate the garden. At three GPM, I can deliver 50 gallons of rain water in less than 20 minutes. With the ability to simply flip a switch to run the irrigation pump, we no longer need to worry about dragging hoses and dealing with the smell of stagnant water that is typical in mid to late summer.
If you want to continue reading on how to build a rain barrel from a whiskey barrel and where to buy the parts (e.g. pump, strainer, and solar panel), please see my original rain barrel blog: http://www.headspringfarm.com/blog/?p=15
