We have been having issues with intermittent AC relay faults on our three GS7048E Radian inverters. We have already replaced two relay boards where the relays burnt out when running the inverters at or close to the maximum 40 Amps output current, mostly due to run in currents of our machines like belt sanders and the like. Because we run out inverters in a three phase setup an AC relay fault on one of the inverters will cause the whole system to kick itself offline.
Our current AC relay boards have two relays, one for grid input and one for generator input. I noticed in an Outback instruction document which describes Radian board replacement procedures that currently Outback is delivering Radians with four relays! If that is the case, wouldn't it be nice if OB gave some kind of warranty on what appears to be a deficient design which has since been upgraded and improved upon..... ?
Here are the images that show the difference.https://drive.google.com/file/d/0B_Wi1k ... sp=sharinghttps://drive.google.com/file/d/0B_Wi1k ... sp=sharing