Re: Keep snow off solar panels!
A little sweep as needed, and within an hour or so in sun they melt off. The worst is warm snow (not an oxymoron!) on cold panels, that freezes to a thick crust at the bottom of the snow. That takes a bit to melt off, but normal snow melts pretty quickly.
A simple idea is some frost-tex type heat tape around the edges of each panels. Controlled by a switch rather than a t-stat, they draw under 3 watts/foot, only when they are on. You could also carefully run a string of frost-tex across a panel, making sure you don't shade individual cells. The tiny amount of heat would allow the panels to melt off even faster if getting on a roof to sweep them is out of the question.
PS. My panels are near the ridge. The problem is that the panels may slide, but the roof below the doesn't, so that even when I sweep them, I have to shovel out below them a couple of times a winter to clear the build up of snow below the bottom edges of the panels.
Please note, being a moderator does not add any weight to my opinions 300 watts Siemens/BP panels,plus a Sun 90,, making ~400. ~30 amps into Rogue MPT-3024, 450 ah of Trojan T-105, Morningstar ts300 inverter, a Tri-Metric meter.a collection of antique generators, plus 2 Honda eu-1000i's (also a BS2512 IX controller) and assorted other stuff!