3.8kW – 10kW | 240/120VAC or 230/115VAC | Isolated Online Tower UPS External Battery Systems
The Xtreme Power TX91L series delivers the highest level of power conditioning and noise isolation for demanding electrical environments. Designed specifically for use with large external battery systems, the TX91L offers flexible runtime scalability without the limitations of internal battery trays.
Built around a galvanic isolation transformer, the TX91L eliminates common-mode noise, provides exceptional surge protection, and stabilizes power in installations where grounding, harmonics, or electrical noise are a concern. This makes the TX91L ideal for retail, industrial facilities, laboratories, instrumentation, and any site where transformerless UPS systems may fall short.
Available in 3.8 kVA, 5 kVA, 6 kVA, and 10 kVA, the TX91L is a rugged, isolated online UPS engineered for clean, conditioned, and predictable power—during both normal and bypass operation.
Key Features & Benefits
- Galvanic Isolation Transformer – Eliminates common-mode noise, resolves grounding issues, and provides full isolation in both normal and bypass modes.
- Extended Runtime with External Batteries – No internal batteries; includes a high-current 4A programmable charger designed for large external battery systems.
- Dual Output Voltages – Supports multiple output configurations for flexible system integration.
- Configurable Output PDU (Optional) – Choose receptacle panels to meet application-specific requirements.
- Maintenance Bypass (Standard) – Manually transfer loads to utility power to enable safe UPS servicing without downtime.
- Static Transfer Switch – Automatically switches to isolated bypass during overload or inverter fault.
- Exceptional Surge Protection –
- < 10 V normal mode (L–N)
- < 0.5 V common mode (N–G)
Tested to ANSI/IEEE C62.41 Category A surge conditions.
- Robust Surge Withstand Capability – Meets ANSI/IEEE C62.41 Category A & B standards (6 kV / 200–500 A, 100 kHz ring wave).
- Programmable Charger – Adjustable from 1–4 A using the front display.
- LCD User Interface – View precise power metrics, alarms, and battery charging parameters.
- Auto Restart – Automatically restarts after utility power is restored.
- Certifications – UL1778, cUL, FCC Class A, RoHS, TAA compliant.
- 3-Year Warranty – Electronics covered for 3 years (USA & Canada).
Available Models
| Model | Capacity |
| TX91L-3.8k | 3.8 kVA / 3.8 kW |
| TX91L-5k | 5 kVA / 5 kW |
| TX91L-6k | 6 kVA / 6 kW |
| TX91L-10k | 10 kVA / 10 kW |
Ideal Applications
The TX91L excels in environments where electrical noise, grounding problems, or large runtime requirements create challenges for standard UPS systems:
- Retail & Point-of-Sale Systems
- Industrial Automation & Controls
- Laboratories & Sensitive Instrumentation
- Medical Diagnostics & Imaging Support Equipment
- Broadcast & Pro AV Systems
- Facilities with Generator Power or Poor Grounding
- Sites Requiring Long Runtime with Large Battery Banks
External Battery Runtime
The TX91L is engineered specifically for extended runtime applications using customer-supplied or XPC external battery systems.
- Supports large external battery strings
- Includes 4A programmable charger to optimize battery performance and lifespan
- Suitable for runtimes from minutes to many hours depending on configuration
Contact XPC for custom runtime solutions and battery sizing recommendations.
Included Protection & Conditioning
- Galvanic isolation transformer (normal and bypass modes)
- Surge suppression meeting ANSI/IEEE Cat. A & B
- Static switch for fast, safe transfer
- Low let-through voltage (<10 V L–N, <0.5 V N–G)
- Isolation eliminates need for costly dedicated circuits
Why Choose TX91L Over Transformerless UPS Designs?
Transformerless UPS systems leave loads exposed to common-mode noise and grounding instability. The TX91L:
- Fully isolates the load
- Protects sensitive electronics from noise, harmonics, and ground faults
- Provides superior power conditioning in both normal and bypass mode
- Supports extremely long runtimes via external battery banks
This makes TX91L the preferred choice for problematic electrical environments where clean, stable power is essential.
Contact Us
Need help selecting the right TX91L configuration or external battery system?
Contact Xtreme Power today.
Contact Us | View All Products
(800) 582-4524
sales@xpcc.com
[table colalign=”left|left|center|center |center|center”]
,MODEL NUMBER,TX91L-3.8k,TX91L-5k,TX91L-6k, Tx91L-10k
INPUT,Capacity,3.8kVA (3.8kW),5kVA (5kW),6kVA (6kW),10kVA (10kW) [attr colspan=”4″]
,Voltage (Nominal),”208VAC (200VAC, 220VAC, 230VAC, 240VAC optional)”[attr colspan=”4″]
,Voltage range, 110-300VAC [attr colspan=”4″]
,Frequency,46–64Hz auto-sensing [attr colspan=”4″]
OUTPUT,Voltage, 240/120VAC or 230/115VAC [attr colspan=”4″]
,Voltage regulation, ± 1% [attr colspan=”4″]
,Frequency, 50/60Hz ± 0.1Hz[attr colspan=”4″]
,Overload capacity, “110% 10 min; 130% 1 min; >130% 1 sec”[attr colspan=”4”]
,Efficiency, “Up to 97% ECO mode, 91% online mode”[attr colspan=”4”]
BATTERY CHARGER,
,Charger amps, “1A-4A (max) programmable from LCD”[attr colspan=”4″]
,Charger voltage, 273VDC [attr colspan=”4”]
PHYSICAL, Input/output, “Terminal blocks or optional PDU”[attr colspan=”4”]
,UPS dimensions (W x D x H), “9.9 x 23.3 x 32.4 in”[attr colspan=”4″]
,UPS weight, 272 lbs, 275 lbs, 278 lbs, 307 lbs[attr colspan=”4”]
OPTIONAL PDU, Input connection, “Terminal blocks or 6 ft, L6–30P*”[attr colspan=”3″] Terminal blocks [attr colspan=”4”]
,120V receptacle options, “5–15/20R”[attr colspan=”4”]
,240V receptacle options, “L6–30R, L6–20R, 6–15/20R, C19″[attr colspan=”4”]
ENVIRONMENT,Temperature,32–104°F (0–40°C) [attr colspan=”4″]
,Audible noise,< 50 dBA[attr colspan=”4″]
,Altitude,”11,500 ft above sea level”[attr colspan=”4″]
APPROVALS,”UL1778, cUL, FCC Class A, RoHS”[attr colspan=”4″]
WARRANTY,”3 years electronics, 3 years battery warranty (USA and Canada)” [attr colspan=”4″]
COMMUNICATIONS INTERFACE,”RS-232, EPO, intelligent slot for optional cards (Web/SNMP, Relay/dry contact, Modbus)” [attr colspan=”4″]
INCLUDED IN BOX,”User manual, RS-232 communication cable, ViewPower Software CD”[attr colspan=”4″]
AVAILABLE OPTIONS,”5 year extended warranty, output PDU, input L6–30P cord (for 3.8kVA, 5kVA & 6kVA)” [attr colspan=”4″]
[/table]
*6kVA system capacity will be reduced by 30A input circut