Solar Energy

solar waterer system for cattle took a month to ship, eventually did come but i was unable to leave feedback for it on ebay. puts out about 3.5v and 0.6 amps – 2 watts on a overcast day not sure it would see a full 10 watts of power unless a concentrator was used. (if you get one of these wash it off good(mostly the sides of it where the plastic layers meet), not sure if it was something i did but i had chemical taste in my mouth afterwards) if they were to use peltier coolers as heat converters to make more power  it could get up to around 35% efficiency

25% efficient 75% heat waste

2% gain per 10 deg  cooling

5%-10% TEC peltier conversion

can find 2 of these for 1000 dollars on some listings