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www.fortresspower.com | (877) 497-6937 | techsupport@fortresspower.com

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11-01-21 REV1.0

System Start Up

After un-boxing, turn on unit by hold-

ing the push button for ~10 seconds 

(wait for the green status light to turn 

on)

•  Verify Voltage is above 49V on 

the LCD Screen

•  Turn battery off if Voltage is 

above 49V

If Voltage is below 48V, contact tech 

support

• Turn on the inverter DC input disconnect

• Turn on the eVault Max(s) using the push 

button

Read this entire document, in addition to the Installation Manual, 

before installing or using eVault Max. Failure to do so 

or to follow any of the instructions or warnings in this 

document can result in electrical shock, serious injury, or 

death, or can damage eVault Max, potentially rendering 

it inoperable.

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2

49+V

• Turn the DC breaker on the eVault max to 

the “On” position

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ON

OF

F

QUICK START GUIDE

eVault Max 18.5

Before starting up the battery for the first time ensure the 

following:

 The system inverter/equipment is De-energized

 eVault Max is Turned off (screen off)

 eVault DC breaker is in “Off” position

• For single battery systems set the Battery 

ID to 0

• For multiple battery systems. set the bat-

tery ID to 1, 2, 3...N

• NOTE:

 Please see the full installation manual 

for multi-battery systems

• Power cycle the battery by using the push 

button after changing this value.

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• With the battery off, connect proper DC ca-

bling to the terminals of the eVault Max

• Land the other ends on the inverter DC input, 

or bus bar/battery combiner

5

ON

OF

F

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Battery ID

• When configuring closed loop communication 

set this ID to match your inverter type.

• Fortress/SolArk RS485

 = 1 

SMA CAN

 = 2

• Fortress CAN

 = 3 

Victron CAN

 = 4

• Schneider RS485

 = 5

Protocol ID

• For multiple battery systems you will need to 

set the battery termination resistor of the first 

and last battery to ON, with all others set to 

OFF.

• In addition, you will need to connect the 

included ethernet communication cables as 

shown from battery-to-battery

120Ω

ON

120Ω

OFF

120Ω

ON

COM_Parallel

COM_Parallel

COM_Parallel

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