July 3, 2010 AT 11:55 pm

Solar charging…

Products show available in the new products section!


Check out all the Circuit Playground Episodes! Our new kid’s show and subscribe!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground”Adafruit’s Apps!



3 Comments

  1. Hi Limor.

    In fact, the VxI curve of a solar panel will also depend on the season because of the distance to the sun.
    In my sunny Rio de Janeiro, the solar incidence varies from 1200 W/m2 (during summer) to less than 300 W/m2 (during winter). This panel you showed seems to be an polysilicon one, which has 15% efficiency. If it was a monocristaline, it could go up to 30%, but would also be more expensive.
    Sandia National Labs have a GREAT handbook on power systems with all the math you’ll ever need to design a solar panel. And it all comes to efficiencies and basic electricity.
    One more thing! this resistor below here is not color blind friendly! It took me almost a minute to find out brown and red!

  2. realtico, thanks! these are monocrystaline, but not the $$$ ones so just 15% efficient. do you have a link to that sandia labs paper?

  3. Hi again!

    try this page:
    http://photovoltaics.sandia.gov/puborder.htm

    The handbook I like is this one:
    http://photovoltaics.sandia.gov/docs/PDF/Stand%20Alone.pdf

    Before I started working for the evil (oil industry) I worked in Telecom (the dungeons, with chain and balls attached to my leg) and in an alternative energy lab. That’s how I got in touch with this handbook!

    Regards,

    RealTico

Sorry, the comment form is closed at this time.