Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t
Unless you have tried to do your homework and understand the impact of such factors....
The difference in roof declination of 30 Degrees compared with 45 degrees amounts to a potential difference of 4% in system output of comparable systems, if the roofs are within +/- 10 Degrees of Due South.
If the roofs are orientated within + or - 40 Degrees of Due South, the difference in system output can be as much as 7-8%.
I know these 2 solar systems have comparable shading, that they are located close to one another at similar altitudes / orientations and that they have similar weather. The roofs have a different inclination, which affects output between the two systems by 4%.
I have tried to compare the outputs of 2 comparable systems scientifically, but others may agree to differ.
I have found the latest Suntech STP250S - 20/Wd to compare favourably to the
Sanyo's 250 HIT's. I am seeing a 4-5 % difference in generation between the 2 in current climatic conditions in March 2012 in North West England.
If the Sanyo Hits lost 4-8% maximum generation output based on roof declination / orientation in a worse case scenario, how much more energy are they likely to generate than the Suntech STP250S - 20/Wd solar panels for a 40-50% cost premium? 8-13%?
Unless you have tried to do your homework and understand the impact of such factors....
The difference in roof declination of 30 Degrees compared with 45 degrees amounts to a potential difference of 4% in system output of comparable systems, if the roofs are within +/- 10 Degrees of Due South.
If the roofs are orientated within + or - 40 Degrees of Due South, the difference in system output can be as much as 7-8%.
I know these 2 solar systems have comparable shading, that they are located close to one another at similar altitudes / orientations and that they have similar weather. The roofs have a different inclination, which affects output between the two systems by 4%.
I have tried to compare the outputs of 2 comparable systems scientifically, but others may agree to differ.
I have found the latest Suntech STP250S - 20/Wd to compare favourably to the
Sanyo's 250 HIT's. I am seeing a 4-5 % difference in generation between the 2 in current climatic conditions in March 2012 in North West England.
If the Sanyo Hits lost 4-8% maximum generation output based on roof declination / orientation in a worse case scenario, how much more energy are they likely to generate than the Suntech STP250S - 20/Wd solar panels for a 40-50% cost premium? 8-13%?
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