Want to build a 1000W system for a cabin in the mountains. Depending on time of year, it gets 2-3 hours of direct sun with 2-3 of tall tree shading on either side of that with full shade thereafter. Since I'm not going to cut down the 100 year old trees, what's the best 250W+ panel that handles shading? I've heard that Canadian Solar panels uses split cells with more columns and that there's a bypass diode on each column and that Sunpower has a bypass diode across each cell. Comments/suggestions?