Good feedback.

 

Correct - I made a mistake with the comment about 'turning on all loads' that was my battery test back with a carb'd engine! Opps.

 

Gary - The comment "most automotive systems will work until 6V" maybe on the optimistic side.  I'll isolate the loads for various sub systems and use my HP Power Supply to see what is going on (HP6033A - 0 to 20V; 0 to 30Amp).  Nothing worse than discovering the ignition coils won't fire will less than that 8.2V, or the ignition circuit will start pulling 6 Amps to compensate for lower voltage!   Little things like 12V relays will need 9V to close, but remain closed down to 4V....  Only way to find out for sure is test everything.  

 

Worst mistake ever... the old "starter on top of motor/bell housing" 12A engines.  I had a worn starter bushing, so once the starter engaged it would not disengage.  This was in my RX2. Jumped out, battery still cranking the engine, popped the hood open.  Right when I was going to twist off a battery connection, looked down and watched the "+" post melt right into the battery!  I was like "What the Heck..... "  BOOM!  Battery exploded, blew the top off, acid went all over the place.   You would have thought by now I would have learned to stay away from rotary engines. :)  

 

Tom