How much power does solar panels actually generate?

pianotuna wrote:
Hi acei,

The two volt cells have a life span of up to twenty years.

Cell failure, statistically speaking is more likely with a greater number of cells.

Six volt batteries have 3 cells each. 6 x 3 = 18 cells to possibly fail, or three times the risk of failure.

I see... What would be the lifespan of 6V (say Trojan) batteries? Is it significantly shorter? As I mentioned before, my goal is to own this future rig for about 8 years or may be a bit longer. Would a good 6V battery last this long?