We have a Generac 30KW generator, powered by a 300 CID Ford truck motor that runs on propane. The previous owner said that it would run for a month on the 1000 gallon tank. I have had occaisional problems with the automatic transfer switch. It is interlocked to insure that the line side is disconnected before the generator side is switched in. On the last outage, the line side didn't fully release. The generator was running (burning up propane) but not feeding power. [img]/forums/images/icons/frown.gif[/img] The repair guy will soon tear the switch apart to find out why it didin't release the line side.