Figure 2-14, Method 2 - Dc Ground Rod With Multiple Connections; Figure 2-15, Method 3 - Dc Ground Rod With Single Connection - Magnum Energy Sensata MagnaSine Owner's Manual

Installation
Method 2 (see Figure 2-14): When the AC and DC service panels are near each other, then the
AC grounding electrode conductor (GEC–AC) and DC grounding electrode conductor (GEC–DC)
can be connected to a single grounding electrode (GE). In this method—since there are multiple
connections to the DC grounding electrode—the size of the DC grounding electrode conductor
(GEC–DC) cannot be smaller than the largest conductor in the DC system (usually the battery-
to-inverter cable).
AC Service
Neutral
GBB
Figure 2-14, Method 2 – DC Ground Rod with Multiple Connections
Method 3 (see Figure 2-15): The AC grounding electrode conductor (GEC–AC) is bonded to the
DC ground point and the DC grounding electrode conductor (GEC–DC) is the only connection to
the grounding electrode (GE), which must be a rod, pipe, or plate electrode.
In this method, since there is only one connection to the ground rod, the DC grounding electrode
conductor (GEC–DC) is not required to be larger than #6 AWG (13.3 mm
for allowing this smaller grounding electrode conductor is that it is only required to stabilize the
system voltage with respect to earth, and the other properly-sized conductors in each electrical
system will safely carry any fault currents if they occur.
AC Service
Neutral
GBB
Figure 2-15, Method 3 – DC Ground Rod with Single Connection
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AC Electrical System
MS-PAE Series Inverter/Charger
Panel
Hot
A C
GC
Neutral
SBJ
AC Ground
EGC-AC
GEC-AC
Grounding Electrode
(AC and DC sides shared)
(using a single grounding electrode)
AC Electrical System
MS-PAE Series Inverter/Charger
Panel
Hot
AC
GC
Neutral
SBJ
AC Ground
EGC-AC
GEC-AC
DC Electrical System
Positive
D C
GC
Negative
DC Ground
EGC-DC
Grounding
System
GEC-DC
GE
DC Electrical System
Positive
DC
GC
Negative
DC Ground
EGC-DC
Grounding
System
Grounding Electrode
(DC side dedicated)
© 2017 Sensata Technologies
DC Service
Panel
Negative
SBJ
GBB
) copper. The reasoning
2
DC Service
Panel
Negative
SBJ
GBB
GE
GEC-DC