The TrueCharge units used to come with a remote panel. All tWhe remote panels said was a mimic of the panel right on the unit. If it was showing actual voltage, digital, it was a battery monitor, a completely different animal.
They can, never could. The way they work, once past the bulk charge state, is essentially based on battery acceptance. See:
http://c34.org/bbs/index.php/topic,4787.0.html Batteries that are full, like an emergency reserve bank, can get overcharged due to repeated bulk/acceptance stages or extended engine running when charging sources are being controlled by the depleted house banks. You may also be interested in this:
http://c34.org/bbs/index.php/topic,4352.0.html
Then he's dumb.:naughty: AGMs and Optimas are two different types of batteries. See the West Marine Advisors, like this
http://www.westmarine.com/webapp/wcs/stores/servlet/westadvisor/10001/-1/10001/BatteryCharging.htm and
http://www.westmarine.com/webapp/wc...1/-1/10001/SelectingaMarineStorageBattery.htm. See also:
http://www.catalina-capri-25s.org/forum/topic.asp?TOPIC_ID=19287
Opinions: please remember I asked you to check FACTS, not only my opinions or those of others on this thread which I've noted may not be quite correct. That's why I provide links to reputable sources. Yes, some of them I've written (which could make them less than reputable

) but are based on the facts that I've learned from those very sources and culled them into simple English as much as I could after 25 years of boating electrical experience. Believe me or not, your choice, but when you do your homework let me know how far off we were.
You would also do well in searching on this board for echo chargers, combiners and alternators, since many of us have written about this in great detail earlier and there is a wealth of information right at your fingertips. You have some very good basic questions that may become clearer to you as you dig into the references and wiring diagrams.