[PhilBot]

What we really need here is somone at IFI to post a "Theory of Operation" for the charger.

I've read half a dozen "this is how it works" posts today, and none of them (spanning several years) fill me with confidence. It really does seem that a basic series steering doide would have been a good idea to prevent the battery from powering other devices on the 12V bus. So I wonder why they didn't/haven't add(ed) one.

It's unlike FIRST to insist we do something based on "faith", and that's the feeling I get with this charger.

Time for IFI to step-up and explain this circuit.
Or at least add some text to the schematic so it's funtion is clear.....

"An un-commented schematic is just as bad as un-commented code." Me.

Phil.