After 7 days of generating (2 sunny, 2 rainy and 3 cloudy), we're estimating our system will produce around 7900 kWh's per year. That's a value of $948 annually, or $79 a month. Not bad considering that it's only costing us $64 more per month on our mortgage, and that's before we apply the tax-rebate to principle.
We believe this is a conservative estimate, because we don't believe that 2 days of sun per week is the norm. According to TexasBest.com we should expect it to be sunny, 58% of day hours, on average.
Of course the main function of the panels for us is offsetting the cost of running the A/C, and the panels should be providing more generation on hot, sunny days. It's a natural hedge against blazing summer months. If there's more sun on average, it will produce more power on average.
We installed the panels on the 5th of November, so we'll look at the numbers again on December 5th, and calculate based on a full month's generation. By then we'll likely see our first low energy bill as well.
Stay tuned.
Pictures coming soon, and the KPRC story has been filmed and should air in a week or so.
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