Most solar panel warranties cover manufacturing defects, but only some guarantee output over the life of the panel. The rate of deterioration is significantly higher among semi-flexible panels, which is why the warranty periods and projected lifespans are shorter. Although replacing cheap panels at 10 years might make economic sense, Practical Sailor recommends going with higher quality panels with longer warranty periods and projected lifespans.

1. A line graph showing typical warranty performance illustrates the difference in longevity between longer lasting rigid panels and semi flexible panels.

2. Semi-flexible panels loosely mounted on a bimini top can shorten life by creating microcracks in the thin silicon wafers. The lack of cooling air underneath can reduce output.

3. Hardware or gear dropped on a panel can create serious damage that will reduce output or cause it to malfunction completely.