a bit over a week one of my 6 255w solar panels on the roof decided to develop an earth fault, the inverter sensed that and stopped power generation altogether.
an inspection indicated that all panels are on the way out, not just one. these 'znshine' panels are clearly not much good; they lasted just 8 years, and the warranty is pretty useless: '5 years for faults and defects' and '25 years for output degradation but only if that's your sole problem'...so for all practical purposes '5 years'. meh.
fortunately the solar sparkie that i talked to (who did a good job for my neighbours recently) offered some second-hand better quality for a very good price, and now there are 7 renesola 250w panels on my roof and i'm happy again.