OK, the hang after short power loss seems to be fixed for the most part.

However it is still not booting the first time unless the engine is running. It will usually boot up if the engine has been running very recently, but leave the engine turned off for more than 5 minutes and the empeg will hang as it boots up when you turn the keys into Accessory.

I checked the voltage coming out of the 2 year old battery one cold morning and it was a good 12.4Volts.