Not quite. The actual figure at the surface of the earth is about 1000 watts per square meter. If you go above the atmosphere, it is closer to 1366 watts per square meter. Neither comes close to 3000 watts.Zurc wrote:There is about 3000 Watts in a square meter of Sunlight to be had.
The roof is not normally aimed direcly at the sun. (The sun is not directly overhead. If the sun is 30 degrees above the horizon, you would only get half as much energy. Actually less, as it goes through more atmosphere.)so assuming 44% efficiency, that's about 1320Watts which at 12V would be around 110 amps.
So if the entire leaf roof was used, it could probably do some serious charging of that 12V battery.
It would be nice to know what that panel on the Leaf is capable of.
The maximum efficiency of a single junction solar cell is only about 37 percent as I recall, and the real panels are lower, around 18 - 20 percent, even less in implementation due to gaps between the cells, etc..
If you get 150 watts from the top of a leaf, you would be doing pretty good.
More realistically, the trickle charge panel likely produces about 0.04 amps.Normally there's about 2A on a trickle charge so unless there's a really efficient panel there, I seriously doubt it can do much.