It is also important to note that once a typical 100 amp hour battery is charged it will provide the user, through our 1200 watt inverter approx 10 hours of power at 10 amps. Ergo the 1200 watt system.
Ray, 1200 watts is 1200 watts (120V x 10A) whether it is supplied for 10 hours or for 10 minutes. Now here are a few areas where your argument falls flat on its face:
1. A 100ah battery might well provide 10 amps for 10 hours, but after a few charges and discharges it would no longer be of any use. For deep-cycle batteries, a discharge of 50% is the maximum that is recommended if you expect the battery to last more than 2 or 3 years.
2. Here is a quote directly from the freetricity.com website:
"3 to 5 = 10 x 10
Three to Five Hours of Wind Gives you ...
Ten Hours at 10 Amps = 10 Kilowatt Hours"
The clear implication there is that the E2D will generate 10 Kilowatt Hours of electricity in 3 to 5 hours.
Now you are saying that the maximum output of the system is 1200 watts or that it can theoretically produce 6 Kilowatt hours of electricity in five hours. That's 1200watts x 5 hours.
Do you think you can make up your mind on the power output of the system?
Another point worth mentioning is that power rating of a renewable energy system is the amount of energy produced by the renewable energy source, and NOT the rating of the inverter. Anyone can purchase a 5 kilowatt inverter, but if you only have 2 kilowatts of solar panels then you have a 2000 watt system. No ergo required. In fact, its probably a good idea to have your inverter rated about 20% higher than the maximum continuous power that you are using.