Wrenches,
What considerations are there for the number of charge controllers
that can be in a stand-alone system with a single battery bank? If
one uses MPPT controllers, then one would want (I think) a different
controller for different module orientations. That is, if one had a
couple modules at one azimuth/tilt angle you would have a controller
for that, and another controller for a module at a different azimuth/
tilt angle. Also, I can see having a controller to turn on yard
lights (Morningstar makes one, although it is not an MPPT type and is
of limited capacity). Could also one have a controller for diversion
loads? And also a controller for a wind generator? So I can see
where a stand-alone system might have 4 or maybe even more
controllers, all tied into the same battery bank. Are there any
considerations for a system like this? For instance, do the setpoints
for all controllers need to match?
Colin Vogt
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