My battery boiler and it's true numbers.

[jmacstack]

I'm getting ready to take the coach out on her final journey too Fort Flagler State Park over and up in Washington near Port Townsend. I'm doing some maintenance on her, ie, checking battery water and filling my reserve tank with oil, etc. Once again it got me thinking about my electrical system and the 6 new monster batteries I just installed this summer. In wanting to take good care of them I decided to check out the specs on the current battery charger. Here is what I have and I would like to have a better understanding of what the numbers on it really mean.

Magnatek TU-775-2
120 V 6HZ 14.5 amps
Average Charge Rate: 7.5 amps
12.0 VDC 75 Amps Total
Red Lead, Positive
White Lead, Negative

What exactly do all these numbers mean?

I am leaning towards a Progressive Dynamics..the 80-Amp Converter/Charger.

Is it hard to change the Magnatek to the Progressive Dynamics. Am I going to have to add any wires or connecters? It looks fairly straight forward. There is this funky household looking junction box in front of the battery charger.

I look forward to your input, Jennifer