Board Thread:Warhammer 40k General Discussion/@comment-10051320-20130526124353/@comment-3346182-20130815072654

Well CaptainAndrath, I'd say you have a good point even if we're referring purely to fictional background.

The Terminus Ultra's capacitor banks are highly specialized, likely ancient and arcane technology that is very difficult for their artificers to produce and repair.

This is likely the reason why it's so rare among the Chapters of the Adeptus Astartes.

Furthermore, if the specialized technology is rare and valuable, it's likely any Chapter lucky enough to own a Terminus Ultra would avoid deploying it and risking a damaging overload... unless it was an engagement where its firepower could be put to decisive effect (such as hunting down a superheavy war engine or bio-titan).