I was just digging around some old photos and I came across a couple of pics from my greenhouse last year… Check out the what’s possible with the energy from a single solar cell!

electrified lettuce plants growing faster

Electrified lettuce in bottom-right cell: increased germination rate over all other cells.

And then, 16 days later…

Electrified lettuce not only germinating better, but growing better, too!

Electrified lettuce in bottom-right cell: increased germination & growth rate over all other cells, 16 days after previous photo.

As you can see, the solar cell pictured here, connected to the pot on the lower-right cell, had a significant effect on both the germination rate and growth rate.  The voltage used here was approximately 1.2 volts.  All seeds were started in a mix of Fox Farm & Black Gold potting soils.

 

  • Adam Beatty

    I can’t wait to try this; I have to get out of this apartment. This is so exciting. With the worlds strain on food resources and need for alternative farming methods; this is ground shaking.

  • electricfertilizer

    Give it a try indoors… It doesn’t take much. Let me know if you need help setting things up.

  • Keith

    Did you measure the voltage? The issue is that a solar cells voltage will vary depending on the current draw. You’ll see the highest voltage with an open circuit, and no voltage when it is shorted, and everything in between depending on the resistance

    • I did, I believe it was about 1.1 volts or so, open circuit. I think it would be great if someone did some testing with an inline resistor and measured the voltage variations off of it while also looking at moisture levels and rate of growth.

      • Keith

        A small inline resistor, aka a shunt resister, would create a voltage dividing network. Knowing the voltage across the photo-voltaic cell and the voltage across the in line resistor would help to determine the amount of current in the circuit/soil. Variations in soil conductivity will result in variations of electric current.