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3.3
DC wiring of parallel units
Note: Always use the same length positive and negative cables! Be aware that to keep the drawings in this chapter clear and
easy to read, the cable lengths have not been drawn in proportion to each other.
Minimum DC cable
Power system
cross section
12V
95 mm
24V
50 mm
48V
35 mm
3.4
AC wiring of parallel units
®
®
* Neutral to ground bonding depending on local regulations
Mass Combi Ultra, Mass Combi Pro – Installation Manual Multiple Units
BUSBAR
FUSE
BATTERY
SWITCH
BATTERY BANK
Inline fuse
2
350 A
2
175 A
2
80 A
PRIMARY UNIT
©
Parallel configuration with MasterAdjust
FUSE
Recommended
battery bank
800 Ah
400 Ah
200 Ah
REPLICA UNIT
©
Indicated cable sizes are for cables from
unit to busbar and shorter than 3m. Cables
from busbar to battery bank should be
twice the diameter. When cables are
longer than 3m, the size should be
increased to compensate for cable losses.
©
®
® = Residual Current Device (RCD)
© = Circuit Breaker, no RCD!
Breaker AC OUT-2 = 50 A max
7
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