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What would you do? Solar PV Install
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<blockquote data-quote="Bob Smith" data-source="post: 548991" data-attributes="member: 35176"><p>West-East is also very good orientation. To give you an idea. I got my 4kWp in 2016 facing South East. Panels are 15% efficient. My aunty got her 4kWp in April 2022 facing West - East with panels 21% efficiency. I generate a yearly average of 3850kWh. She got 4100kWh her first year (ok she leaves 1h away from me so is Preston sunnier than Cheshire?). </p><p></p><p>I am also planning to have panels on my other side of the roof, ie facing North West. Using an online calculator (see links below). </p><p>I determined that those calculators are conservative.</p><p>For my existing panels, they give an estimate of 3400kWh while as mentioned above, after 7 years I got a yearly average of 3850kWh</p><p>When I model on the North West roof. It gives about 3100kWh. Knowing that the new panels will be nearly 50% more efficient and that I can install 6kWp instead of 4kWp. I am actually expecting that this array will produce yearly about as much as my panels facing South East if not more and it will be facing North!!</p><p></p><p>So yes, if you have little shade on your roof. I will not hesitate to install as many panels as possible.</p><p></p><p></p><p></p><p>I wrote this post last year, You'll find several links to model how a PV system will perform according to several parameters</p><p></p><p>[URL unfurl="true"]https://electricianforum.co.uk/threads/how-to-calculate-the-generation-in-kwh-of-the-pv-panels.55061/[/URL]</p></blockquote><p></p>
[QUOTE="Bob Smith, post: 548991, member: 35176"] West-East is also very good orientation. To give you an idea. I got my 4kWp in 2016 facing South East. Panels are 15% efficient. My aunty got her 4kWp in April 2022 facing West - East with panels 21% efficiency. I generate a yearly average of 3850kWh. She got 4100kWh her first year (ok she leaves 1h away from me so is Preston sunnier than Cheshire?). I am also planning to have panels on my other side of the roof, ie facing North West. Using an online calculator (see links below). I determined that those calculators are conservative. For my existing panels, they give an estimate of 3400kWh while as mentioned above, after 7 years I got a yearly average of 3850kWh When I model on the North West roof. It gives about 3100kWh. Knowing that the new panels will be nearly 50% more efficient and that I can install 6kWp instead of 4kWp. I am actually expecting that this array will produce yearly about as much as my panels facing South East if not more and it will be facing North!! So yes, if you have little shade on your roof. I will not hesitate to install as many panels as possible. I wrote this post last year, You'll find several links to model how a PV system will perform according to several parameters [URL unfurl="true"]https://electricianforum.co.uk/threads/how-to-calculate-the-generation-in-kwh-of-the-pv-panels.55061/[/URL] [/QUOTE]
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