Lithium batteries don't like getting too high a re-charge voltage - they heat up and, in extremis, have been known to catch fire/explodePiranha Brother 2 said:can I assume my ND alternator from a Kwaka GPX1000 running on my SF is one of these 'modern charging systems'? It's fully self-contained, reg part of the internals, just two wires to plug into the battery.
The old type of reg/recs that use a SCR as the switch to ground are (relatively) slow to react - the current needs to be (relatively) high before they switch - and they can pass recharge voltages as high as 15v. A modern reg using a MOSFET to do the switching will react quicker under less current and should stop short of this.
But I can't say for your Kwacker system ... So in the end, I'm not a lot of help (insert 'Bl**ding Useless' smiley)