So, in the same post, you said that charging off the engine was a bad idea and would’t work well, and that it works great and it’s what you do??
Some 2-gauge cables will charge the camper batteries faster than any charger connected to an inverter running off your truck. That’s essentially the same thing but with extra inefficiencies and less current. But at least it costs more...
Checking for AC ripple in your charging system is as simple as taking your digital volt meter and setting it on the AC scale and touching the test leads to your batteries while the truck is running.
.05v is a about as much as you want to see, .1 is generally considered a “fail”.
Depending on the alternator it may take some searching but you can get new diodes for most. Those are what stops the AC ripple.
Having an alternator tested at most auto parts places won’t help, they don’t usually check AC ripple, just 12v output. An alternator that flunks an AC ripple test will still pass their 12v load test.
It’s odd that some people say the batteries in the camper should be charged only with a special charger, yet have no issue with the batteries in their truck being charged from the alternator.
As for causing a slow death to the alternator... driving the truck causes a slow death to every part of it...
