I did catch that and surmised the problem was cut in/out voltage in-compatibility. Oddly, that "Not for use..." statement only appears with that particular distributor and is not asserted by the factory literature, which states it will work "any other DC charging source".
This originally lead me to believe the Echo charger solution was not certain.
My solar controller cut-off is 14.4V. The Echo charger cut-on is 13V. If my 110W solar panel(s) can charge the coach bank over 13V, the Echo charger should cut-on and direct currrent to the chassis bank. This appears to have worked with Milo's coach.
Al, thanks, but the problem I'm trying to solve is not charging with shore power connected, it's charging both banks with solar panels, while stored.
I'm still thinking the Echo charger is the simplest and least expensive solution...
2004 Alpine 34 FDDS
Anaheim Hills, CA