> If you don't rev the engine slightly the system won't allow charging.

Thanks everyone for the responses, most of which boiled down to the
above.

I feel I should elaborate. At start, with NO initial throttle or
revving, all of the led's including battery do go out. Also, when I
start up w/o revving, the battery DOES seem to get charged if I do not
run the heater fans. (I was not running the electric defroster on the
rear window when this occurred). When the engine "catches" it will
initially go to 1800+- RPM's for a second before dropping into an idle a
smidgen below 1000, and does that without any throttle. This is a Tiico
I-4.

Maybe the battery is getting a little old, but other than this, it had
been fine, and once underway, charged up. I will get it tested anyway.
When it would not start the middle, yellow, led light in the camper
battery display lit up when checked.

-Steve