eVault Max 18.5 Manual

13
V4.2 11-02-21
When installing multiple inverters with one or more eVault Max 18.5, please turn the first
inverter on then use the following the steps, then power up the remaining inverters.
4.5.7 Parallel eVault Max Units
eVault Max units with the same capacity may be connected in parallel in configurations of up to 20, this is the
maximum number allowed for consistent and robust operation. Quantities greater than this will require
consultation with Fortress Power. A qualified installer should understand the complexities of large-scale
storage and must adhere to industry electrical design guidelines, including the NFPA standards and local fire
codes when installing systems of this size.
The storage capacity and total available current are increased in a parallel arrangement. The following
illustration shows how to connect multiple batteries in parallel. Please note that while the overall system
voltage is not changed, the available current from the system has been doubled.
Note: For parallel systems maintain identical wire length and wire type from eVault Max to the system
battery combiner. When installing more than one eVault Max, a dedicated battery DC combiner is highly
recommended. Please see our website for application notes on bus bar selection.
CAUTION! The eVault Max is designed for parallel operation only; series arrangement for higher
voltage can result in damage to the eVault Max and will void the warranty.