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The Water Cooler
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Are solar panels worth the investment?
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<blockquote data-quote="-Pjackso" data-source="post: 3623397" data-attributes="member: 8119"><p>According to my calculations (which are probably not accurate):</p><p>Given: 350 watt panels, quantity 24 panels, roof mounted at 35 deg, no shading problems (trees):</p><p></p><p>Average monthly generation is 1034 Kwh/month. </p><p>PV generation maximum of 1483 Kwh for June, and a low of 692 Kwh in Nov - with the remainder of the months in-between.</p><p>With winter rates of $0.09/kwh, I'd expect about $65-100 savings per month.</p><p>Summer rates of $0.12/kwh, I'd expect about $150 savings per month.</p><p>This is all based on best-fit calculations, based on real-world PV outputs.</p><p></p><p></p><p>I'd strongly ask the contractor to get you real output generation data (2-3 years) for similar sized systems.</p><p>That would be the best comparison for expectations and KWH savings.</p><p></p><p></p><p>Best of luck.</p></blockquote><p></p>
[QUOTE="-Pjackso, post: 3623397, member: 8119"] According to my calculations (which are probably not accurate): Given: 350 watt panels, quantity 24 panels, roof mounted at 35 deg, no shading problems (trees): Average monthly generation is 1034 Kwh/month. PV generation maximum of 1483 Kwh for June, and a low of 692 Kwh in Nov - with the remainder of the months in-between. With winter rates of $0.09/kwh, I'd expect about $65-100 savings per month. Summer rates of $0.12/kwh, I'd expect about $150 savings per month. This is all based on best-fit calculations, based on real-world PV outputs. I'd strongly ask the contractor to get you real output generation data (2-3 years) for similar sized systems. That would be the best comparison for expectations and KWH savings. Best of luck. [/QUOTE]
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