Free Sun Power shining on Solar panels generates free energy by converting sunlight to electricity with no moving parts, zero emissions, and no maintenance Free tutorials, interactive online Design Tools and a Solar Power Simulator at FreeSunPower.com


Run your own Solar Energy System! 5 Meters display charging, power, voltage, & more. Watch the power change as you turn appliances on/off.

Details of the Solar Energy System used in this small, energy efficient, earth sheltered home.

Home Page
System Simulation
About Solar Power
FAQ's
Easy 5 Step Guide
Example Systems
Solar Energy Home
Solar Projects
  Solar Combiner Box
  Mini Junction Box
Terms & Definitions
Basic Tutorials :
  Overview
  Solar Panels
  Charge Controllers
  Power Inverters
  Storage Batteries
  AC Generators
  Wires & Cables
  Meters & Monitors
Advanced Info :
  Watts & Power
  Solar Radiation
  Battery Wiring Diagrams
Design Tools :
  System Sizing Estimator
  Battery Bank Designer
  Wire Size Calculator
Nasa Animations
Solar Domain Names
Helpful Links
Site Map

Quick and easy projects for your Solar Energy System that will save you money!
Solar Domain Names for websites For Sale
Advanced Tutorials
Battery Wiring : series & parallel diagrams
Battery Wiring shows diagrams of battery configurations to produce increased current and different battery bank voltages. This tutorial will show you how you can set-up any system voltage and any battery bank capacity.
Watts, Power, and Ohm's Law explained
This advanced tutorial presents more detailed information on Watts and Power, including some basic Ohm's Law lessons and examples of voltage, current, resistance, and power in circuits.
Sunshine chart of the United States
Solar Radiation details a map of average daily sunshine across the United States that will be very useful in helping to calculate the number of solar panels required for your Solar Energy System.

Design your system quickly with our Interactive Design Tools
(Note : These design tools require javascript to be turned on in your browser)
* Check out our easy point & click System Sizing Estimator to quickly & easily calculate the number of solar panels and storage batteries you'll need for a wide range of system sizes.
* Our Battery Bank Design Tool will take the confusion out of wiring up your battery bank. Use 2, 4, 6, or 12 volt batteries to build a system voltage of 12, 24, or 48 volts using series and parallel wiring with just 4 clicks. Battery bank capacities from 300 AmpHours to over 4000 AmpHours are displayed graphically so you can see exactly how to wire the batteries together.
* This Wire Size Calculator will allow you to quickly find the correct wire size in AWG (American Wire Gauge) based on the distance to your solar panel array & the amount of amperage your panels put out. No math required!

New Feature!  Check out our new feature Solar Projects where you can build easy, do-it-yourself projects for your solar power system to save money and have fun doing it!

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