So in short, there seems to be two likely candidates:

1) inverter or plug is wired 'Upside Down'.
2)Inverter is not connecting Neutral to Ground while in 'invert'
mode. I know the ProSine units have a relay that does this function,
and also know it can be defeated.

So, a couple of areas to check out.
-al-


On 2 Sep 2003 18:45:04 -0700, (Curtis CCR)
wrote:

Do inverters put out 120VAC with a hot and neutral (the way most
expect to see 120), or is there voltage on both sides? I ask because
a got a "reversed polarity" indication when I plugged my boat into a
friend's boat over the weekend.

He has an inverter but no gen set. I have a gen set but no inverter.
He doesn't run much on his boat except a 120V fridge, so when we raft
up together I usually let him plug in to my boat to get a charge when
my generator is on. My generator quit the other night so I plugged
into him to run my 120V fridge for the night (we were heading back in
to next morning).

I am thinking he has an "upsidedown" outlet, but I wasn't about to
tear his boat apart at 10PM to figure it out. But then I thought
maybe the inverter output was causing it.

Thanks