Replace coverter/charger for lithium

[Kahaone]

I have a 2003 Gulf Stream Sun Voyager with a Magnatek TU 750-2, 50 amp converter. I want to replace with a lithium capable charger, but unsure what type to get. I am not an electrical wizard, so I am leery of buying the wrong one and screwing something up. And being a non-wizard, I need something simple to install.
Any and all help is greatly appreciated.

 

[Kahaone]

OK. I got a new converter. So simple to install, I was worried for nothing. But.......I have 14.4 (or somewhere around that) volts going out of converter and nada at the battery. Battery is new lithium 230ah. Does the negative cable from converter go straight to the battery, or is it grounded on the frame somewhere? I cannot find a negative cable near battery, so I grounded to frame.
I have a 2003 Gulf Stream Sun Voyager, gas engine.
Gas engine charges battery, but not the generator/converter.

 

[Rickg]

Hi I Have a 2002 tourmaster and I am wondering where the ground from the converter is connected to the frame?

 

[Kahaone]

Hi I Have a 2002 tourmaster and I am wondering where the ground from the converter is connected to the frame?

On my 2003 Gulf Stream Sun Voyager, gas engine, I just found that mine grounds to the frame right near the passenger side rear wheels.
Hope that helps you Rickg.

 

[Leisure Time Larry]

My positive cables go to big 80-100 amp circuit breakers before going to the battery. Follow your wires.