Instruct: Classify an Amazon review into positive or negative sentiment.
Query: shorts if connected wrong

I used this inverter several times and it was fine. Then I accidentally hooked it to the battery in reverse polarity. Yes, I know this was dumb, but mistakes happen.Here is what the manual says for diagnosing problems:"The AC load will not operate. Digital display is off."Possible Cause: "The inverter has been connected with reverse DC input polarity."Solution: "Check connection to battery. The inverter has likely been damaged and needs to be repaired. Have the unit repaired (not covered under warranty)."Seriously? There is no need for the unit to blow itself up because it was hooked up wrong, that is what voltage protection circuitry is for. Xantrex obviously knows this will be a problem and yet haven't designed for it.As I said, the unit worked fine until I misread the battery connections...