I agree with KGone. I've heard some great stories about Dual Pro. They'd probably replace it, or give you a decent credit for it. They'd probably be curious as to why it failed so quickly. I'm on my third year with mine, and it better last more than five years for what they cost. I keep the hatch open that it's in, and keep a fan running under the boat cover whenever it's in the driveway. It keeps air circulating over the charger and the electronics.
I always keep the hatch open when charging, and I keep a fan going most of the time in the garage, and keep the charger plugged in all winter. A couple weeks ago it showed 2 red led lights flashing, a sign of possible bad battery. I took the battery back to sears, (it is within 5 weeks of warranty expiration) and they agreed it was bad. It is a sears platinum ($279)!
Of course I told the wife that is what you get for buying good stuff, a replacement battery............... and then a week later that side of the charger dies. No lights nothing. So maybe I should have tried to get Dual Pro to replace it, but I figured since it is out of warranty I wouldn't have much chance at getting a replacement. I ended up with the Dual Pro SE, a cheaper model, but still $229. As I was doing my research on what to buy, there are a lot of reviews by people that complained about failures not long after the warranty period for both Dual Pro and other manufacturers.
The only positive in this story is the fact that I hit a slot machine the other day for $675, and got out of the casino with most of it. So it didn't hurt as bad as it could have!
In the future I will attempt to contact the manufacturer for possible remedies, but I gotta think they will tell me to take a hike!