Forum Discussion
otrfun
Mar 14, 2022Explorer II
Tom/Barb wrote:A 30a dc to dc charger producing only 20a of charge current indicates 1) a very inefficient dc to dc charger with only 66% conversion efficiency, 2) an installation experiencing excessive voltage drop due to undersized cabling or bad terminations, and/or 3) a 20a dc to dc charger that is improperly rated as a 30a charger.BFL13 wrote:Yes.Tom/Barb wrote:Do you still believe that ?
This is what we did, A 30amp DC to DC charger gives you the ability to charge the coach battery bank while running the coach engine.
This limits the engine alternator to 30 AMPs thus prevents overheating the engine alternator....
Hope the OP doesn't .
Our equipment is operating as it should, 2 years in, set IAW Victron's settings .
So why shouldn't I believe that?
Some folks wouldn't believe, even when the proof is in front of them.
Our 40a dc to charger outputs 40a of charge current with only a 43.5a draw on the alternator—-92% conversion efficiency. The manufacturer recommended 4 gauge for our run length. We used 2 gauge cabling to minimize voltage drop and maximize conversion efficiency.
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