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Thats the best way IMO, run a common straight 24v alt and use a converter from your 24v battery to feed the 12v loads.

If you had a 12v alternator with an isolated ground(ground as a second output, not attached to its chassis), you could put it in series with a normally chassis grounded alternator, just like you can wire two 12v batteries, or 2 solar panels in series +to-. The batteries would be connected - on...

From what I have seen from Allison, they made that change somewhere in 95. the fact the A0 has no 12v switched ignition power pretty much confirms what you are saying, that none of the LMTVs are 12v only. Based on the year I was thinking it was possible, but the 24v only ignition aspect just...

There is no point really. I think ~95 the Allison went from 12v only to to 12 or 24v input, As mentioned new LED lighting doesn't really care. 24v only gauges are a little less available, but they are out there. Even our own gauges on the A0 are bastards, 24v gauges with 12v lighting…...

The problem is you don't have a 12v side and a 24v side, you have 12v out of the middle of 24… in this case it is a basic arithmetic problem Voltage on batteries in series is additive. IE 13.65 + 13.65 = 27.3. 27.3V coincidentally is the standard 24v regulator voltage setting and 13.65V per...

the only one I can think of like that was a custom rig called the dual alt, but like the other dual alt configs proposed to replace our dual volt alternators, it suffered from the same series wired independently regulated alternator issues(impossible to maintain balance). Not sure how they even...