We're in the process of ordering solar panels
for our new arch and I'm curious if anyone here has experience with the LG315W panels
. They're technically rated for more wattage than most panels
in a similar size range due to the fact that they're double sided and can take advantage of reflected light on the underside. This is attractive considering they'll be surround by water
but my concern is with the affects of shading. Due to being mounted on our arch roughly half of the bottom of the panels would be shaded by the arch and bimini
. The other half would receive a good deal of reflected light.
I know that even a small percentage of shading typically has a large impact on power output. Since the 315W ratting depends on reflected light on the back I treating the topside power rating as something around 275-285 since the footprint is very similar to other quality panels in this wattage range. So my real question here is how much power additional power would you expect to see for the added cost ($80 per panel). The absolute max would be an additional 30W per panel, 285W top only vs 315 with reflected (again this is my very rough SWAG). With half the bottom shaded from reflected light anyone want to hazard a guess as to how much of that additional 30W we'd actually see?
This will be full time cruising, so even a few extra amps over the long run start to add up, but I don't want to just flush $ down the toilet if we're not going to see a benefit.