Charger Trouble

[DL222]

I purchased a PDI charger for my 2015 EZGO TXT 48 volt. (Also have a Tripp lite Surge Protector)

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I got it so I could leave it at my hunting camp over the summer. We have not been down for a couple of months. Got down and this is what the plug on the charger looked like.

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I cut the plug out and spliced the wires in (only uses two wires).
Batteries are at 48.1 volts and I read 8 volts at all batteries. When I plug the charger in I get a solid red light on the power and a flashing light on the Charging and the amp meter does not go up.

What do y'all think may be the problem?