It looks like you have a pretty good final price of $5761 for the 8.67kw system which comes to about $0.67/watt. Usually a vendor will provide you with an average kWh generation value for your system or you can go to the following website and enter the information they ask for and it will provide you with an estimate of what your system can produce and savings.
The just divide the amount saved into the amount spent and you get a close payback in years.
The just divide the amount saved into the amount spent and you get a close payback in years.
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