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8. Backward compatibility with legacy pre-VE.Bus units
The control panel is backwards compatible with legacy (pre-VE.Bus) inverter/chargers running firmware versions 15xxyyy,
17xxyyy, and 18xxyyy. The transition from pre-VE.Bus to VE.Bus occurred from late 2007 to mid-2008.
For pre-VE.Bus systems, the control panel operation and setup align with the manual, except that the control panel does not
automatically adapt to the system. The default setting is for a standalone inverter/charger with a 16A transfer switch, but if a
different AC transfer current applies, the
8.1. System examples pre-VE.Bus
Pre-VE.Bus system with 1 AC source:
The control panel must be scaled (matched to the system) when it is used with pre-VE.Bus systems. This can be done by
changing the "scaling factor" parameter. For instructions, refer to the
Once the scaling is accurately configured, proceed to set up any other relevant parameters. For instructions, refer to the
Configuration [6]
chapter.
Pre-VE.Bus system with 2 AC sources:
For a pre-VE.Bus system with 2 AC sources, an external transfer switch
The control panel must be scaled (matched to the system) when it is used with pre-VE.Bus systems. This can be done by
changing the "scaling factor" parameter. For instructions refer to the
Once the scaling factor is configured, follow the installation process similar to using a VE.Bus system with an external transfer
switch. Refer to the
MultiPlus system with 2 AC sources and transfer switch [4]
8.2. Configuration
Configuration is the same as described in this manual, with the exception that a scaling factor needs to be set up.
To set up the scaling factor, see the next paragraph, and for configuration of the remaining parameters, see the
chapter
8.2.1. Pre-VE.Bus scaling factor
This parameter only applies to pre-VE.Bus systems. Leave it at its default value of 1 for VE.Bus systems.
The scaling factor aligns the control panel AC current with the system AC current and is exclusive to pre-VE.Bus inverter/
chargers.
Begin by calculating the scaling factor as directed in this chapter. Afterwards, move on to configuring the scaling factor. For
guidance on configuration, consult the
Scaling factor formula:
Scaling factor = (NrOfDevices * DeviceType) - 1
• DeviceType: 1 = 16A unit, 2 = 30A unit.
• NrOfDevices: all units, including the master unit.
Examples:
• One 16A unit: Scaling factor is: (1 * 1) – 1 = 0
• Two 30A units in parallel: Scaling factor is: (2 * 2) – 1 = 3
• Four 30A units in parallel: Scaling factor is: (4 * 2) – 1 = 7
• Six 30A units in 3-phase (2 paralleled units per phase): Scaling factor is: (2 * 2) – 1 = 3
Important:
1. When configuring a non-zero scaling factor in the control panel, do not specify the number of slaves in the VEConfigure
software. Instead, set the slave count to zero.
2. In a split-phase or 3-phase setup, the NrOfDevices reflects the number of devices per phase. So for a 3-phase system
consisting of 6 units (2 per phase), the NrOfDevices is 2.
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Digital Multi Control
Scaling factor [7]
needs to be adjusted.
Scaling factor [7]
Scaling factor [7]
Setup menu [6]
chapter.
chapter.
(VE Transfer
Switch) is essential.
chapter.
chapter for instructions.
Backward compatibility with legacy pre-
Configuration [6]
VE.Bus units
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