Eflex Install Manual
Rev. 1.92 
505 Keystone Rd, Southampton, PA 18966, USA . (877) 497 6937. sales@fortresspower.com . 
www.fortresspower.com 
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3.  Once all brackets are properly positioned, carefully lift the battery 
with the help of someone and gently drop it into the female wall 
mounted brackets 
Note: the eFlex may be wall mounted in any orientation except for sideways 
with the terminals near the ground (see section 4.4.2 floor mount installation 
for picture) 
4.4.2 Floor mount installation   
The eFlex 5.4 can be floor-mounted in several orientations. The 
orientation depicted to the right, with the terminals towards the 
ground, is the only orientation NOT allowed. All other orientations are 
allowed, but regardless of orientation, the included floor mounting bracket 
must be used to prevent the battery from tipping over. Therefore, it is 
common to put the back of the eFlex battery against the wall.   
1.  Place the eFlex in the preferred orientation 
2.  Attach the mounting bracket using the T-slot fastener and T-slot 
groove on the back of the eFlex 
3.  Screw the mounting bracket into the wall 
4.  Connect the battery terminals to the corresponding bus bar and 
inverter 










