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5.9 Installing Multiple Units in Parallel, Split Phase or 3-Phase
Configuration
Introduction
This entire chapter is only relevant if using more than one Any-Grid unit. Multiple Any-Grid units of the same
model number can be used either in parallel on a single phase, split -phase / 2-phase (only 120Vac mode ls), or in a 3-
phase configurationwith a commonneutral. All units must be connectedto t he same batterybank. This chapter is an
addition to all other sect ions abovein the chapter “Installation”, please adhere t o all guidelinesand safety
instructions in those sections ac cordingly.
Parallel operation on a single phase is possible with up to 9 units.
Alternatively, 3-phase configuration is possible, whereby at least one unit must be installedon each of the 3 phases
with a maximum of 7 units on a phase.The total number of units may not exceed 9 in any case.
For 120Vac models split-phase (2-phase)operation is possible whereby at least one unit must be installedon each of
the 2 phases with a maximum of 8 units on a phase. The total number of units may not exceed 9 in any case.
CAUTION: If using an AC source, each unit must be connected to a neutral and a phase conductor, never two
phases.
Mounting the Units
When installing multiple units, please keep a minimum distance between the units as shown in Fig. 13.
Fig. 13: Minimum distance between units and to other objects
Connections
Use the cable cross-sections, tightening torque and connectors as described for a single unit.
Battery Connection: Make sure to use a separate DC fuse or circuit breaker for each unit. Instead of connecting each
unit to the battery, connect each positive battery cable to a bus bar, and each negative battery cable to a secondbus
bar. These bus bars are then connected to the battery terminals.The cross-s ection of the bus bars, and t he cables
from the bus bars to the battery te rminals should equal t he recommended battery cable cross-section per unit, times
the number of units connecte d to it.
The minimum recommended battery capacity for lead-bas ed batteries is 200 Ahper connected Any-Grid. For
example, in a system wit h 3 units, t he battery bank should have a capacity of at least 600 Ah.
CAUTION: All inverters must share the same battery bank. Otherwise, the inverters will go into fault mode.
CAUTION: Please install at least a breaker at the battery terminals and AC input of every individual Any-Grid
unit. This will ensure each unit can be securely disconnected during maintenance and fully protected from
over-current of battery or AC input. Use the breaker ratings as described in the chapters “Battery Connection”
and “AC Input and AC Output Connection”.
AC Connections: Regarding AC input and output, please also follow the same principle. Use the wiring cross-section
and circuit breaker as d efined for each individual unit, then attach those wires to bus bars. The bus bars from the AC
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