Charging lithium batteries from an alternator, be that in a boat or vehicle, presents some challenges when compared to the straightforward nature of charging lead based batteries. The video in this blog highlights these lithium challenges and shows you what can happen when things go wrong –...
Cough every time you hear him say Victron to avoid distasteful sales-speak.
I have a CTEK D250S mounted under the bonnet (hood?). It is on the drivers side (offside/right) behind the brake/clutch servo I think. UK spec vehicle. I can provide photos but it doesn't get too hot there and I've not had any problems.
It was in my last D2, and I've had this one now for 3-4 years now, and the one before it was fitted for at least a year.