Hi Chris,
In a recent thread related to suppressing alternator spikes you mentioned that the Balmar TSP-12/24 (Fused Zap-Stop Diode) is not suitable. Seabourne Solutions LLC has a patent pending means of reliably and repeatedly suppressing alternator spikes (e.g. as a result of disconnecting the alternator from a battery) to below 25V. The patent pending technology also obtains more energy from an alternator at low rpm. Let me know if Balmar would have an interest. -John