Charging Isolated Battery Banks
Abstract:
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T e c h n i c a l D o c u m e n t a t i o n
Charging with 1 Controller
Isolated Battery Banks
There is often a need to charge two or more isolated batteries with the same off-grid solar
system. Morningstar’s SunSaver-Duo charge controller is designed to charge 2 isolated bat-
tery banks with an adjustable charging priority. We recommend the use of this controller for
isolated battery bank applications. See Morningstar’s website for more details.
Other Morningstar controllers can be wired to charge isolated battery banks, but there are
some signicant limitations. This tech note shows the wiring schematic and outlines some of
the challenges with this approach.