Re: Is it possible to but multiple charge controllers in series?
I have had this idea kicking around in my head for a couple of years now. So sort of jumping back to the original question what about this?
Say you have two banks of solar panels at 90v at 50 amps each. Now from those two banks you really only run three wires down to the controllers.
Wire 1 – solar panel bank one positive
Wire 2 - solar panel bank one negative and solar panel bank two positive
Wire 3 - solar panel bank two negative
Now between 1 and 3 you have 180vdc, and 90vdc between 1 and 2 and 90vdc between 2 and 3. Then you wire them to the controllers like this
Wire 1 - 1st mx-60 positive side
Wire 2 - 1st mx-60 negative side
Wire 2 - 2nd mx-60 positive side
Wire 3 - 2nd mx-60 negative side
These two inverters in turn feed a 48v battery bank.
As either of them sweeps or whatever wire two would pick up the load. But in wouldn't most of the time wire 1 and wire 3 be carrying the majority of the load? And wouldn't this reduce line loss since it would be basically running 180vdc? Or did I totally miss something?
XW6048, 4 KC 120's, 4 KC 130's and 4 Evergreen 200's totaling 1800w of PV, MX-60 charge controller, Trimetric meter and eight AGM 8A8D's or 490 amps at 48v. 4 tons of geothermal and 3 tons of air source.