
Voltronic Axpert Ultra 8K Off-Grid Solar Inverter
- Parallel Capability:YES, 6 units
- Selectable Voltage Range:170-280 VAC (For Personal Computers)

The Axpert Ultra 11K is an off-grid solar inverter rated Axpert Ultra 11K.
In stock
The Axpert Ultra 11K is an off-grid solar inverter rated Axpert Ultra 11K. Every figure on this page is read from the manufacturer's manual for the Axpert Ultra series.
Specifications last updated 18 August 2026
| Parallel Capability | YES, 6 units |
|---|---|
| Selectable Voltage Range | 170-280 VAC (For Personal Computers) |
| AC Voltage Regulation (Batt. Mode) | 230VAC ± 5% |
| Efficiency (Peak) | 93% |
| MPPT Range @ Operating Voltage | 90-450 VDC |
| Maximum PV Input Current | 27A x 2 (MAX 40A) |
| Maximum Charge Current | 150A |
| Rated Power | 11000VA/11000W |
| Surge Power | 22000VA |
| Maximum PV Array Power | 12000W (6000W x 2) |
| Maxmum Solar Charge Current | 150A |
| Maximum AC Charge Current | 150A |
| Communication Interface | USB/RS232/RS485/WiFi/Dry-contact/BTS |
| Waveform | Pure sine wave |
| External Current Sensor Port | Yes, built-in current transformer sensor |
| Compliance Safety | CE |
| Floating Charge Voltage | 54 VDC |
| Solar Charger Type | MPPT |
| Maximum PV Array Open Circuit Voltage | 500 VDC |
| Battery Voltage | 48 VDC |
| Overcharge Protection | 63 VDC |
| Net Weight (kgs) | 18.4 |
|---|
| Humidity | 5% to 95% |
|---|---|
| Operating Temperature | -10°C to 50°C |
| Storage Temperature | -15°C to 60°C |








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Read: How to Monitor Voltronic Inverters and UPS via WiFi →The Axpert Ultra 11K is rated 11000VA/11000W continuous, with 22000VA available on surge for the second a motor or a compressor starts. Size the load you actually intend to run against the continuous figure, never against the surge one.
The Axpert Ultra 11K takes up to 12000W (6000W x 2) of PV array. The string has to stay below 500 VDC open-circuit — that ceiling is reached on a cold bright morning, not at noon. The tracker works over 90-450 VDC, so wire the modules to land inside that window.
The Axpert Ultra 11K works with a 48 VDC bank. It charges at up to 150A, and that current — not the bank's capacity — is what the cabling and the fuse between bank and unit have to be sized for.