In my last blog post I went into great detail about why the “Max Power” quoted on your solar panel specification sheet and the real max power you will actually get from that panel are very different numbers. I showed you how to calculate a more accurate max power by using some little known temperature specs.
In this post I’ll go through the other important numbers that you should look at when comparing solar panels.
Does a solar panel with a “Max Power” rated at, say 190W, really produce a maximum power of 190W when it is on your roof in the blazing sun?
Short Answer: Not on your nellie!
The max power rating (in Watts) that your solar panels are rated at is the figure that everyone quotes when talking about “panel size”. If the installer or salesperson talks aout a “190W or 250W panel” they are talking about the “max power” rating of the panels. This rating is based on the power output measured from that panel under “Standard Test Conditions” (STC) that, unfortunately, are a long way from “Real World Operating Conditions”.
Vast solar arrays in the middle of our hot baking deserts or mainland cities awash with solar panels are generally considered the most efficient way to soak up the abundant sun for energy in our country. In terms of suitability for solar farms in this wide, brown land of ours, the mind definitely points to swelteringly hot parts of the mainland, rather than the cool, fresh, green island of Tasmania.
Not so according to a recent study by the American Chemical Society journal Environmental Science & Technology which says the cooler regions of the world are, contrary to general belief, an excellent area to generate massive amounts of solar energy. The report says that cool climates, particularly those at a higher altitude, have massive potential to generate solar-powered electricity.
Finn Peacock (RSS) (126)
Rich Bowden (RSS) (103)
Solar Power