Float voltage is likely higher than 13.5V but you should see what the manufacturer says. Keep it below the float voltage rec, at 30mA (the current for two bright LEDs and 0.4W) you are likely not harming.
It is correct that when charged excess generates heat and gassing. If you are ever concerned about lead acid cells you can get a temperature controller and shut off charging at 100F or so. Controllers use more than 30mA so not really practical for such a small power source. On Jun 12, 2016 6:56 AM, "EVDL Administrator via EV" <[email protected]> wrote: On 12 Jun 2016 at 5:28, Robert Bruninga via EV wrote: > I added an unregulated solar panel that typically produces only 30 mA to a > very remote cabin car battery deep in the woods. The charge rate will give a > 2 hour per week use of the lights. > > But what happens if no one uses the cabin for months? Does it have to be unregulated? Couldn't you add a simple 3-terminal regulator at float voltage (~13.5v)? (I don't know much about PV, so I don't know whether that would work.) I would think that if the charge were regulated to float voltage, the battery should last as long as the battery in a computer UPS, which is floated continuously. That's usually around 3-4 years in my experience. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160612/bf2675c6/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
