October 21
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• Generators must connect to all systems in parallel as well
Note: The values shown on the home screen of each system represent each system's contribution, not the
total of the array.
• If an error or fault occurs on any one unit, all units will shut down. They will automatically attempt to restart up
to 5 times before requiring a manual restart. If a manual restart is necessary, first resolve the issue that caused
the shutdown. For this reason, we recommend the use of a bypass switch for large installs (as shown in the
diagrams section).
o A manual restart requires powering down the system (no PV, no Grid, Main button off) for 30s. Then
power back up.
• Systems = 1 @ 208V
o Master Ph A Modbus=1: Inv_L2 = Grid_L1 + Inv_L1 = Grid_L2
o Power to Grid: 4.5KW x 2 Legs
• Systems = 2 @ 208V
o Master Ph A Modbus=1: Inv_L2 = Grid_L1 + Inv_L1 = Grid_L2
o Master Ph B Modbus=2: Inv_L2 = Grid_L3 + Inv_L1 = Grid_L1
o 9KWx2 Power to Grid: 4.2KW + 4.8KW & 4.8KW + 4.2KW
• Systems = 3 @ 208V
o Master Ph A Modbus=1: Inv_L2 = Grid_L2+ Inv_L1 = Grid_L1
o Master Ph B Modbus=2: Inv_L2 = Grid_L3+ Inv_L1 = Grid_L2
o Master Ph C Modbus=3: Inv_L2 = Grid_L1+ Inv_L1 = Grid_L3
o 9KWx3 Power to Grid: 4.5KW + 4.5KW & 4.5KW +
4.5KW & 4.5KW + 4.5KW
Before Enabling Parallel Operation
A. Make sure all units in parallel have the same software
version. Hardware version may also affect compatibility; Call
or email Tech Support if you parallel indoor and outdoor
units to verify.
B. Check the following screen to verify your firmware versions
C. Go to https://www.sol-ark.com/software-update/ to
schedule an update or call Tech Support for assistance
D. Parallel systems REQUIRE a joint battery bank. If you do not
have a battery, you can keep all Sol-Ark's out of parallel and
set every System to Grid Sell Mode.
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