20 Watt Do-it-Yourself Solar Energy Starter Kit Back by popular demand! Our 20 Watt solar energy starter kit for do-it-yourselfers. Includes all the parts to build your own solar energy system to power lights, radios, laptop computer, fan, small tv and lots more. We've made it very easy to put together with complete instructions. Includes: 20 Watt Solar Panel SunGuard 4 amp charge controller 32 amp-hour sealed battery Go Power! 175 Watt DC to AC power inverter Voltage meter 12V DC outlet with fuse What could you power? If the 20 watt solar panel received 5 hours per day of full sun, then you would have generated 100 watt-hours of energy (double if you get 10 hours of sun!). If you were using a 20 watt compact fluorescent bulb with the inverter (we'll call it 25 watts because the inverter uses some energy) then you could light the bulb for about 4 hours with the energy you produced that day. But you have a battery! Since the battery holds 32 amp-hours or over 400 watt-hours of energy, you could light the light for 12+ hours before you need a charge, but it's better to charge it sooner. You get the idea - the sun puts watt-hours into your battery and then you use it to power stuff that uses watt-hours. Energy in, energy out. The charge controller prevents the 12v sealed lead-acid battery from over-charging, the inverter converts the 12V DC to 115V AC (standard household-type power). The Xantrex PROwatt 150 inverter is limited to loads of 150 watts or less. Perfect for beginners and those wanting to get started in solar but don't know where to start. Upgrade available to move up to a Xantrex PROwatt300 300 Watt Inverter. Customize your own system. House the battery and components in a cooler on wheels or build a wooden box. Cut a hole and mount the panel voltage meter. Makes a great demonstration system of how a basic solar home works. Teach your kids and other peoples kids about solar power - they're the future!