falcon5000...what worked for me as a good experiment platform for the Goal Zero 7w panel.... take a piece of scrap plywood, put a 16d nail near the top as perpendicular to the plywood as possible, then take it to direct sunlight... slide a piece of 2x4 under top edge and adjust so the shadow of the nail falls upon itself, you will have good orientation ... it took about 4 hours to completely charge 4 AA Sanyo Eneloop NiMh rechargable compared to 2 hours on AC...slid the charger under the platform to get it out of direct sunlight...my ammeter was down, so couldnt get an accurate charge rate on 12v auto battery I use for digital TV and fan...this is a back up system for a small 3500W Honda