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Fortress Power FLEXTOWER All-In-One FlexTower w/ Inverter & DuraRack Enclosure

Fortress Power FLEXTOWER All-In-One FlexTower w/ Inverter & DuraRack Enclosure

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Our Price: $2,030.00

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Product Code: FLEXTOWER

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Description Document(s)

Fortress Power FLEXTOWER All-In-One FlexTower w/ Inverter & DuraRack Enclosure

Manufacturer Part#: FLEXTOWER

The FLEXTOWER comes with two enclosures - Top and Bottom. The top enclosure holds the Envy inverter and can accommodate Sol-Ark inverters. The bottom enclosure (DuraRack) holds up to 4 eFlex units.

  • All-in-one solution
  • Supports off-grid
  • AC or DC couple to existing or new PV arrays

Batteries and inverter are not included.

This item cannot ship UPS Ground. Please select the "FREIGHT SHIPPING QUOTE ONLY” option at checkout. Once we process your order, we will contact you with the shipping options. For questions, please contact us at 800-942-2424 ext 1.


Full data sheet can be found in the Document(s) tab above.

Model 12K 15K
On Grid AC Output
Rate AC Output Power to Grid (On-Grid) 12000W (50A @ 240V) 15000W (62.5A @ 240V)
Rate AC Output Power to Load (Off-Grid) 9000W (37.5A @ 240V) 12000W (50A @ 240V)
Grid Bypass 15120W (63A @ 240V) 48000 (200A @ 240V)
Surge AC Power for 10 sec in Backup Mode 16,000W 24,000W
AC Output Voltage 120/240VAC (split phase), 208VAC (2/3 phase)
AC Output Frequency 50 / 60 Hz
Inverter CEC Efficiency 96.5% (Peak 97.5%)
Response Time (Grid-tie to Off-Grid) 5 ms
PV Output
PV Input Power 17000W 17000W
PV Voltage Range 125 - 500V
MPPT Voltage Range 150 - 425V
Number of MPPT 2 2
Max Solar String per MPPT 2 2
Max DC Current per MPPT 20A 26A
Max AC coupled Input (Micro / String Inverters) 9600W 19200W
Model 12K 15K
Battery (48V)
Battery Cell Type Tier 1 Automotive Prismatic Lithium Iron Phosphate
Battery Type eFlex 5.4
Battery Capacity Range Scalable Capacity Range 16.2 - 81 kWh
Voltage Range 45 - 56V
Max Charging/Discharging Rate 185A 250A
Battery Efficiency 98%
General Data
Operation Temperature Range 32°F ~ 114°F
0°C ~ 45°C
IP Rating IP65 / NEMA 3R
Enclosure Weight 265 lbs | 120kg
(W x H x D)
29.3 x 79.5 x 17.7 in
744 x 2019 x 449 mm
Cooling Fan Cooling
Warranty 10 years
(8000 Cycles @ 80% DoD)
Communication Modbus, RS485, Wi-Fi
Certificates UL 1741, UL 1741-SA, UL 1973, UL 9540, UL 9540 (A)
Side Knockouts 1.5” (3), 1.25” (1), 0.75” (4)

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