Fortress eFlex Max 5.4 kWh 51.2V eFlex Max Battery
MPN No: eFlex Max 5.4 kWh
Expected ship date Sep 07 - 14
In Stock
1,899.00
-20%
$1,519.00
27 products
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Fortress eFlex Max 5.4 kWh 51.2V eFlex Max Battery
MPN No:eFlex Max 5.4 kWh
Expected ship date Sep 07 - 14Sale 
Fortress Power Envy 8kW All in One Hybrid Inverter + 2 eFlex Max 5.4 kWh Batteries Combo
MPN No: eFlex Max 5.4 kWh + Envy 8 kW
Expected ship date Sep 07 - 14
In Stock
6,623.00-2%$6,773.00
Fortress Power Envy 8kW All in One Hybrid Inverter + 2 eFlex Max 5.4 kWh Batteries Combo
MPN No:eFlex Max 5.4 kWh + Envy 8 kW
Expected ship date Sep 07 - 14
Fortress Power 19.2kWh Energy Storage Kit: Envy Duo 21 | 16kW Peak / 12kW Continuous + eForce 19.2 kWh + Free Guardian -Bundle
MPN No: Envy Duo 21-US (16KW) / eForce-19.2 / Guardian
Expected ship date Sep 07 - 14
In Stock
15,299.00-6%$14,249.00
Fortress Power 19.2kWh Energy Storage Kit: Envy Duo 21 | 16kW Peak / 12kW Continuous + eForce 19.2 kWh + Free Guardian -Bundle
MPN No:Envy Duo 21-US (16KW) / eForce-19.2 / Guardian
Expected ship date Sep 07 - 14Sale
16kW Solar Kit + 19.2kWh Battery Offgrid Kit | Trina 445W + Fortress Power Envy Duo 21 + eForce 19.2 kWh
MPN No: 1 : 850079800205 eForce 19.2 (Outdoor Rated, Built-In heater) INCLUDES FREE GUARDIAN GATEWAY, 2: 850079800021 Envy Duo 21 and pallet of Trina 445 from Starworld Malina
Expected ship date Sep 07 - 14
In Stock
22,999.50-20%$18,195.50
16kW Solar Kit + 19.2kWh Battery Offgrid Kit | Trina 445W + Fortress Power Envy Duo 21 + eForce 19.2 kWh
MPN No:1 : 850079800205 eForce 19.2 (Outdoor Rated, Built-In heater) INCLUDES FREE GUARDIAN GATEWAY, 2: 850079800021 Envy Duo 21 and pallet of Trina 445 from Starworld Malina
Expected ship date Sep 07 - 14Sale
Fortress Power eBoost Handle Kit (One Pair) | Battery Lifting Handles for eBoost System
MPN No: eBoost Battery Lifting Handle Kit
Expected ship date Sep 07 - 14
In Stock
$109.00
Fortress Power eBoost Handle Kit (One Pair) | Battery Lifting Handles for eBoost System
MPN No:eBoost Battery Lifting Handle Kit
Expected ship date Sep 07 - 14
10.8kWh Battery Solar Kit - (2) Fortress eFlex Max + DuraRack Mini Battery Solar Bundle
MPN No: 10.8 eFlex Max Kit w/ DuraRack Mini
Expected ship date Sep 07 - 14
In Stock
3,323.00-8%$3,038.00
10.8kWh Battery Solar Kit - (2) Fortress eFlex Max + DuraRack Mini Battery Solar Bundle
MPN No:10.8 eFlex Max Kit w/ DuraRack Mini
Expected ship date Sep 07 - 14Sale
8kW Solar Kit + 11.2kWh Battery Storage: Fortress Power Envy 8kW Hybrid Inverter + eFlex Lithium Batteries + DuraRack Mini
MPN No: Envy 8kW + eFlex 5.6 + DuraRack Mini
Expected ship date Sep 07 - 14
In Stock
7,120.00-0%$7,058.00
8kW Solar Kit + 11.2kWh Battery Storage: Fortress Power Envy 8kW Hybrid Inverter + eFlex Lithium Batteries + DuraRack Mini
MPN No:Envy 8kW + eFlex 5.6 + DuraRack Mini
Expected ship date Sep 07 - 14Sale
Fortress Power DuraRack For The Fortress eFlex 5.4 kWh Lithium Batteries
MPN No: Durarack Fortress eFlex 5.4 kWh
Expected ship date Sep 07 - 14
In Stock
1,707.75-13%$1,485.00
Fortress Power DuraRack For The Fortress eFlex 5.4 kWh Lithium Batteries
MPN No:Durarack Fortress eFlex 5.4 kWh
Expected ship date Sep 07 - 14Sale
Fortress Power Envy True 12kW Home Solar Storage Hybrid Inverter Envy12
MPN No: ENVY-12K
Expected ship date Sep 07 - 14
In Stock
5,199.00-5%$4,898.00
Fortress Power Envy True 12kW Home Solar Storage Hybrid Inverter Envy12
MPN No:ENVY-12K
Expected ship date Sep 07 - 14Sale
Showing 19-27 of 27 total
Shop Fortress Power – eVault Max & Envy LiFePO4 Battery Systems
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Fortress Power is America's leading manufacturer of lithium iron phosphate (LiFePO4) solar storage systems, delivering safe, scalable battery solutions engineered specifically for solar-plus-storage applications. At US Solar Supplier, we carry the complete Fortress Power lineup including the eVault Max and Envy batteries, proven in thousands of residential and commercial installations and compatible with Sol-Ark, SMA, Schneider, Victron, and other top hybrid inverters.
Fortress Power batteries deliver over 6,000 charge cycles, a wide operating temperature range of -4°F to 140°F, and built-in multi-layer BMS protection for safe indoor and outdoor installation. Their modular design allows capacity to be tailored precisely to homeowner needs and expanded over time. Shop Fortress Power at US Solar Supplier for expert solar storage system support and competitive wholesale pricing.
