Jim, I've been flying unprotected but thinking I really need to something for safety sake. Ordered one of Nuckolls OVM-14's and planned to put it in with a B+ line contactor. Now you have me thinking that I may introduce more failure modes than I had before. I am a real advocate of KISS systems.

 

Do you or anyone else on the list know what happens to recombinant gas batteries like the Odessey do when they are overcharged by say the 16-18 volts that you think happens when the alternator regulator fails??

 I don't.  Others will have to speak for themselves.  I doubt there's enough data points to make an informed decision.  I do know that with lead-acid batteries it takes quite a while (several days - 5 - 10? hrs of operation) to boil the water out after the alternator fails to full output.  Not an immediate catastrophic issue IMO.

Bernie