Originally Posted by CoreyNL
Thanks guys, this is a great help!
I'm going to just leave that master switch open while the system is in this configuration. Should I remove the connection between the charger and panel and go with a heavier gauge between the battery
I also happen to have on hand a "mean well S-150-12" power supply - 115 AC input, 12V DC output at 12.5A. Perhaps I should add this to the system to handle my lights/radio/fridge while the charger charges the battery?
Or are there units available that do both? (power accessories while intelligently charging/maintaining the battery)
IMO, your electrical
configuration of given circuit will work with optimum case when: 1/ Battery plays a role as main supply for your 12VDC needs in your RV...2/ Solar panel
, also battery charger will play a role of supplemental through battery
...In order to do that, one should isolate the battery charger from solar
system supply, i.e..no connection directly between battery charger and LOAD. The direct connection b/t solar
control panel to LOAD could work nicely without interference into the battery charger in this kind of set up. Regarding to another extra 12VDC supply( in particularly a DC source which is converted from AC, 120v source), one should put into account of ..THE COMMON BOND in order to make the whole system works as wanted and... in a safely manner. This means, which terminals will be grounded? which ones are FLOAT BOND? Now your system will include 12VDC purely from battery, i. e ...+12V and -12V, Converted 12VDC with its' -12V and +12V, 120VAC common bond(White wire, usually) and AC Ground terminal(Green wire, usually)Remember these kinds of common bonds could include, chassis, battery ground terminal, battery charger's negative terminal and other negative terminal of third DC power supply...After consider all of this aspect AND MAKE IT WORKS, one should THEN determine what is the maximum current of whole combined system could give out and from there to determine what size of wire gauge, what rate of fuse/breaker in the main supply circuit...Just my thought and hopefully you have the courage and please do not forget to test/trial/pilot before put it in a term of permanent use. Safety is first...Good luck.