PANASONIC.
Panasonic aka Sanyo started in 1975 they have been going for years they were called Sanyo and changed ther name in 2012 to Panasonic
There leading modules the most efficient module they have is the panel called HIT Modules . These are more expensive than most but are super high efficient
High Efficiency
Because of the way they are made they are up to 28% more efficient than the average cell according to market research done in 2009. There reliability is good but that kind of goes for all Panasonic or Sanyo goods