There are manufacturers that build upgraded replacement converter/chargers that will direct replace some older OEM chargers with a “minimum of wiring issues”. Progressive Dynamics is one such vendor and depending on what you have now may allow you to swap out the old for a new. I do like their remote charge wizard which allows you to control and/or monitor which charge state the converter/charger is in. Shop around and see what options and prices will work for what you are replacing. Of course the simplest solution is a direct replacement if still available, but the OEM unit may have limited charge states or reliability that you want to improve upon. Having some electrical/power experience is an asset with the swap outs.
https://www.progressivedyn.com/rv/po...r-4600-series/
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