In the last quarter we’ve had two cases of “failed” Suntech modules. This was strange to us because in seven years of working with Suntech we have never had a complaint. What we found out, in fact was that the modules were perfectly fine, but the diodes had been blown. The suspected cause of this is a very near lightning strike and perhaps inadequate earthing. (Although Patrick and I once blew diodes in a module by accidentally reversing the polarity on a battery direct to the module – so we don’t rule out one of those “events” either.) The good news is that the diodes are easy to replace in Suntech modules – they are held in by a tension clamp and can easily be changed in the field. We have some spares in stock here, or you can probably find them at your local electronics bazaar…..