Is it okay to use the jump start terminal and ground for topping off the 12 volt? This seems too simple to me and it is probably necessary to go to the battery terminals.
Yes you can use the front terminals for just about anything you want. The whole car load is on that line so it can support any charger.
No...do anything you need on that jump point. Its a big old wire the whole fuse box hangs off of it. I routinely charge my car since new off it. Its a hassle to get into the trunk. Just use the strut nut right above the terminal box on the strut tower as your ground. And be aware under the red plastic terminal they have bolted a vertical plate so attach the charger clamp on that metal tab that sticks up not the bolt holding it down. Lots of folks have asked about that bolt and they can't get the clamp on it.
For a conventional charger, yes, use the front terminals. However, a battery desulfator uses short, fast rise time pulses to clear the sulfation. I have designed, built, and used these myself, and they work. The problem is that the long run of cable to the rear of the car will rather reduce the effect of these pulses. A real desulfator worthy of the name needs to connected as close to the battery as possible. Other electronics, with their internal electrolytic capacitors on the 12V buss, will also damp out the desulfating pulses, so the optimum situation is to have the battery disconnected. Unfortunately the only way to know if any other situation is acceptable is to use an oscilloscope. It is possible to isolate the pulsing to a connected battery by using high permeability clamp on ferrites on the leads, which raises the impedance of the cables at the high frequencies which make up the pulses. Desulfating an old battery is a slow process, and is best used on a new battery to keep the plates clean. Sorry if this is too technical, but I been dere, dun dat.
True but it does NOT support providing a "jump" to a non-hybrid car........even directly from your battery. It just doesn't have enough capacity.
Three things about that: A new battery has no sulfation to clean off. AGM type batteries do not sulfate nearly as much as conventional wet cells. Sulfation is not really a big problem unless and until the scales flake off the plates and accumulate in the bottom and short out the cell. THAT will never happen in an AGM battery. Worrying about sulfation is pretty much a thing of the past.......unless you use the cheapest batteries you can find.