www.solardave.com This is my 3rd video interview with John Shaw Project Engineer Bella Energy of out of Louisville Colorado. solardave: Do Solar Panels Work Better at Higher Altitude? John Shaw:The fact is at 6000 feet you are actually closer to the sun so the eradiation (?) would likely be more than the 1000 watts per meter squared. I think we have done a little test right outside here and seen 1025 watts per meter squared. On one hand you could potentially be getting more but because of differences in humidity and air pressure things like that you could be getting less. When someone talks about a Sanyo 200 watt panel that 200 watt panel has been established in STC standard testing conditions which is a certain humidity at 75 degrees at sea level and in the lab. And then there is PTC which is Pacific Test Conditions which is supposed represent a little more reality I think they just change the temperature and humidity.