Outback Power Systems VFX Series International Installation Manual - Manual (Page 15)

13
Battery Wiring Examples
• Never install extra washers between the
terminal mounting surface and the battery
cable lug—the connection must be direct and
secure.
• Always install breakers or fuses within the
positive battery cable.
• Torque 2/0, (67.4 mm 2 ) 4/0 (107 mm 2 ), or larger
code-approved cables rated 75°C or higher to
60-inch pounds/6.77Nm.
In renewable energy systems, batteries are connected to each other in one of three ways:
• Series (voltage increases, amperage stays the same as a single battery)
• Parallel (voltage stays the same as a single battery, amperage increases)
• Series/Parallel (both voltage and amperage increase)
Voltage remains at 12V 200AH + 200AH + 200AH + 200 AH=800 AH
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
12V + 12V + 12V + 12V = 48 V Amp Hours remain at 200
SERIES
P
A
R
ALLEL
SERIES/P
AR
ALLEL
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
+ -
12V/200 Amp Hours
Two strings of batteries in series are connected in parallel. The voltage increases to 48V and the
amp hours increase to 400
Battery Cable Lug Lock Washer
Flat Washer
Nut
Insulator
Stud