EG4 indoor 280AH batteries and wall mounting

[stephen.m]

Hi

I'm considering installing some EG4 280AH indoor batteries. The manual says even though they are designed to be wall mounted they also need to rest on the ground to share the load of the weight of the units.

I've seen pictures online of units strictly wall mounted but I'm wondering if that is a practical thing to do, and if so what would be recommended/ideal.

Another option is to go with LL's 100AH mounted in a server rack, which can host 6 of them, making it double the capacity per linear space on the wall compared to 280AH which can be mounted one above the other. The issue with that, is 1. cost as the price per AH especially when taking into account the rack is 10-15% higher than the 280AH units. And 2. apparently even though the battery and the flexboss21 (which I will be using) are both UL compliant, they are not UL compliant when used together. (see page 2: https://eg4electronics.com/wp-content/uploads/2025/08/EG4-Systems-Battery-Wiring-Diagrams-2.0.pdf )

thanks!

 

[rrambo]

My manual says IF you mount the bracket at 29.2" from the ground the battery will sit on the floor. That being said, no way I would try mounting them high up on the wall only even in my concrete wall.

 

[Quattrohead]

It would be fair to say they are wall secured rather than wall mounted, the feet should stand on the floor.
However I do see people stacking these, not in the documentation and good luck to their backs.

 

[stephen.m]

For sure they're heavy and I wouldn't trust them attached solely to a concrete wall or studs.
Aside from the lifting, the best idea I came up with would be to use 24" deep pallet racks with 3 beams per row of batteries (1 beam for the upper mounting and 2 for the unit to rest on (with decking).

 

[TheViper]

Stacking those 300+ pound bad boys? Yikes, I feel a hernia coming on just reading that.

I would never hang these on the wall without most of the weight being on the feet on a concrete slab. But if I ever got a wise hair up my butt to do it, I would probably want to ensure the concrete wall was rebar reinforced and a higher strength mortar was used.

I have 6 of the outdoor all weather batteries, and I can hear the 8x8 slab cussing at me whenever I walk by the building.

 

[stephen.m]

Stacking those 300+ pound bad boys? Yikes, I feel a hernia coming on just reading that.

I would never hang these on the wall without most of the weight being on the feet on a concrete slab. But if I ever got a wise hair up my butt to do it, I would probably want to ensure the concrete wall was rebar reinforced and a higher strength mortar was used.

I have 6 of the outdoor all weather batteries, and I can hear the 8x8 slab cussing at me whenever I walk by the building.

I agree but that’s where the rack idea would be useful. The upper beam could be used to hoist the upper unit, installing the deck and lowering them. Those racks are rated for 10000 lbs and the lower units would still rest on the floor. And the rack would bolted down to the slab.