Solar Panel Output 20 July 2011 at 2:07PM in Green & Ethical MoneySaving 4 replies 934 views

greyteam1959

I have 9 x 230 watt Schott solar panels.
This should give me a maximum output of 2070 watt ??
Yesterday just happened to look at the panel on the inverter & it said it was producing 2300 watt.
How come ??

SideKick

Guess the rating is a nominal value and they can exceed that in ideal conditions. I wouldn't complain ;-)

zeupater

mervyn11 wrote: »

I have 9 x 230 watt Schott solar panels.
This should give me a maximum output of 2070 watt ??
Yesterday just happened to look at the panel on the inverter & it said it was producing 2300 watt.
How come ??

Hi

If it's been cloudy for a while, or even raining, the panels will be cool, which makes them about 0.5% more efficient for each degreeC below their nominal efficiency at 25C. A sunny break in the clouds will not only provide direct radiation to the panels, but the cloud margins will also provide refracted and reflected light so you can have a short period of time when the irradiation is higher than the 1000W/sqm which the panels are nominally rated at, this is 'cloud edge effect'. It is also likely that the manufacturing tolerance on your particular panels is positive rated thus providing a higher output than the rated performance ....

The combination of the above in some form will be what you saw ....

HTH
Z

Cardew

Plus of course if you live in the South West of England you will get a higher output than anywhere else in UK

greyteam1959

I live in North Yorkshire........
Not complaining !!