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Solar PV across different facing roofs

Posted by Chris Rudge on 3 September 2010 at 12:59 pm

Solar PV across different facing roofs

Q: I'm thinking of installing solar PV panels on two roof aspects, one south facing the other east. Can you please explain in layman's language what is meant by 'series' and 'parallel'. Different installers are recommending one or the other or both!  A: Unlike battery charging PV systems, a…

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Inverters for solar PV panels: your questions answered

Posted by Chris Rudge on 6 August 2010 at 8:52 am

Inverters for solar PV panels: your questions answered

Q1: I hear that inverters for solar PV systems typically last a maximum of 5 years, (Sunnyboy ones seem to fall over in Cambridge after a year, because of the way the grid is here). At £1,000 a pop, that makes a big difference to the economics of PV/ FITs, so it would be great to have someo…

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Why solar PV panels don't work so well in the heat

Posted by Chris Rudge on 19 July 2010 at 9:32 am

Why solar PV panels don't work so well in the heat

During these last few weeks of hot sun, which are a welcome change from the rain of previous  few years, we have been getting calls from customers asking why the output from their solar PV panels is down, even though there is bright sun beaming down onto it. The simple answer is solar heatin…

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How to read IV charts for PV solar panels

Posted by Chris Rudge on 6 April 2010 at 10:14 am

How to read IV charts for PV solar panels

Q: I'm being offered a Sharp 235w panel instead of Powerglaz 235w. The IV (current/voltage) charts look different. Can someone explain IV for me? A: I've just had a look at the charts for the Powerglaz polycrystalline 660235 against the Sharp NU235 Monocrystalline, and see that they do have diff…

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What's the best mounting for solar panels?

Posted by Chris Rudge on 10 February 2010 at 9:07 am

What's the best mounting for solar panels?

Flush fitting of a solar photovoltaic (PV) system to generate electricity has both benefits and downsides over the more popular 'on roof' mounting. The benefit is a PV array that is more integrated-looking, although to keep that essential cooling airflow to ensure the system works at maximum effi…

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