well i finished my grid tie system. i switched over the powercom usa solar king grid tie inverters. i have one 1500 watt gti and a 2000 watt grid tie. the 1500 watt grid tie will handle 1875 watts of input power and the 2000 watt model will handle 2500 watts input. they will put out the 1875 watts and 2500 watts if you go that large.
i finished the 100 watt panel bank with 18 panels. i got them from ebay. they are now $155 each on ebay. i'm very pleased with the 100 watt panel system. for the 2000 watt system i have twelve 200 watt panels i got new for $200 each. if i had it to do over again i would have been better off using 9 of them on the 1800 watt bank price wise.
in the winter i get about 4.5 hours of peak output from the banks of panels. i produce arund 19000 watts of power i feed back into the grid in the winter. in the warmer longer days of the summer we haven't been paying anything to the electric company. we get credits towards our bill. last month we got $89 worth of credits. as the days get longer and we get more peak power hours off the panels we'll get even larger amounts of credits. i got another permit to add another 2400 watts of panels and another solar king 2000 gti. i have everything in the garage now to put it in. i have 12 more panels, the gti, disconnect switches, 10 guage wiring, mounting brackets, everythin to finish the new system up. that should give me around 6600 watts total.
since prices have come down i have biult two 2400 watt systems for under $4000 each. our electric bill was running between $280-$350 a month. when you do the math each of the 2400 wat systems will pay themselves off in two years. so in 6 years the entire system is paid for. doing the math using the low end of our electric bill $280 for twelve monthes is $3360. i have around $3800 in each of the 2400 watt setups. it will take under 3 years for them to pay for themselves. the 1800 watt bank will take a little longer becuase the panels were higher when i started buying them, bu they have come down to $155 each on ebay now, and they are great panels. i have a average of $200 each in the 100 watt panels now since the price came down on them. i have $4850 in that back. i would have $3050 in the entire 1800 watt system if i had purchased nine of the 200 watt panels at $200 each. it would have paid for itself in under a year. i guess around 4 years and the entire system will be paid for and that doesn't include rate hikes by the power companies.