Mass Combi Ultra, Mass Combi Pro
– Installation Manual Multiple Units
Parallel configuration with MasterAdjust
7
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.
Power system
Minimum DC cable
cross section
Inline fuse
Recommended
battery bank
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.
12V
95 mm
2
350 A
800 Ah
24V
50 mm
2
175 A
400 Ah
48V
35 mm
2
80 A
200 Ah
3.4
AC wiring of parallel units
* Neutral to ground bonding depending on local regulations
FUSE
FUSE
BUSBAR
BATTERY
SWITCH
® = Residual Current Device (RCD)
© = Circuit Breaker, no RCD!
Breaker AC OUT-2 = 50 A max
®
©
©
©
®
®
PRIMARY UNIT
REPLICA UNIT
BATTERY BANK