eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) Installation

4.5.4 Battery Communications
Fortress eVault Max 18.5 has a self-managed Battery Management System (BMS). No communication is required
between a battery-based inverter and the eVault Max 18.5 to operate the system.
The Communication Box has ve ports next to the battery breaker (refer to communication box picture below).
Those ports are designed to support Inverter RS 485 and CAN communication, battery parallel communication
(see section 4.4.6.) and USB Logging.
These ports also support MODBUS and CANBUS communication. Please consult with Fortress Technical Support
for further assistance.
4.5.5 Grounding
The Fortress eVault Max 18.5 has 2 grounding holes on the bottom of battery case.
4.5.6 System Commission
If you’re installing (x1) eVault Max 18.5, please follow the below steps to start up the system.
1. Check system connection cables for correct polarity.
2. Put the battery’s 250A breaker on the “ON” position.
3. Put inverter breaker in the “ON” position.
4. Push the power button on the front of the unit for 3 seconds to turn on the battery LCD display.
If you install multiple inverters with one or more eVault Max 18.5, please turn the rst
Inverter on by following the aforementioned steps, then power up the remaining inverters.
4.5.7 Parallel Connection
Fortress Lithium Batteries with the same capacity may be connected in parallel for up to 20 stability, eciency,
and overall quality. A qualied installer should understand this and must adhere to the industry standard and
published electrical guidelines.
CAUTION! Fortress Lithium Batteries are designed for parallel operation only - do not arrange in series
for increased voltage. Series arrangement can result in damage to
Fortress Lithium Batteries and will void warranty!