1- Determine Efficiency Increase in Crystalline Cells over amorphous cells?
2-Seasonal Average increases in temperature on a solar panel due to the sun ?
3-Average roof area of a home. Average roof area of a commercial business?
4-Preheated hot water is usable for how long? + or – maybe 3-4 hours? – average insulation values. Look at how long hot water stays hot inside

normal hot water heater without any power. Find per hour heat loss?