48 Watt Solar Panel Arrives
The unit is well-built and seems rugged, much like my 15 watt panel.
I had walked through the mathematics of these panels in a post back in October of last year, but it might be fun to quickly crank through the calculations again with the new panel. Here goes.
The panel has 12 areas with photo voltaic (PV) cells. Each area is approximately 31.5 cm wide by 18.5 cm high. Multiplying height by width we see that each PV cell area is 582.75 cm
There are 100x100=10000 cm
Assume that 1000 watts fall on each square meter of Earth on a nice day. The amount of power falling on the active area of the panel is 1000 w/m
It would be great if we could convert all that sunshine into electricity, but the panel is not 100% efficient. In fact, panels of this sort are only about 7% efficient. If we multiply the total power falling on the active elements of the panel (700 watts) by our efficiency (7%) we get 49 watts. Close enough!
What will I do with all this power? Operate portably a very long time. Certainly there will be some Georges Island operations. I also like to operate portably from hilltops and picnic tables. I managed a few QSOs from atop Mount Washington last July (though it seemed more like January up there!). This power means I can operate QRP all day with my K2, or operate most of a day at 25 watts with the IC7000.