4500VA/4500W with a 9000VA surge
Rated 4500VA/4500W and regulated to 230VAC ± 5% at 50Hz or 60Hz, with 9000VA of surge headroom for motor starts.

A 4500VA/4500W inverter-charger on a 24 VDC bank, taking 6500W of PV through a 120A MPPT charger and holding 9000VA surges in an 11.8 kg wall chassis.
In stock
The Voltronic Power Axpert VM III TRI 4.5K is a 4500VA/4500W inverter-charger built on a 24 VDC battery bank. It holds 9000VA surges, takes up to 6500W of PV through a 120A MPPT solar charger tracking from 60 - 450 VDC, and weighs 11.8 kg. Solar input is capped at 40A and 500 VDC open circuit, read to 2V PV voltage accuracy. On the AC side it accepts a sinusoidal 230Vac feed from utility or generator across 90-280 VAC, narrowing to 170-280 VAC in the personal-computer setting, up to a 300Vac ceiling, and transfers in 10 ms in that setting at better than 95% line-mode efficiency. Output is regulated to 230VAC ± 5% at 50Hz or 60Hz auto detection. Charging runs at a 60A default current and up to 120A, floats at 27Vdc, starts from 23.0Vdc and stops at 33 VDC. A circuit breaker covers short circuits, while USB, RS232, RS485, WiFi and dry-contact handle monitoring. The 336 x 435.5 x 131 mm chassis runs from -10°C to 50°C. It is sold with a 2-Year Manufacturer Warranty. We are an authorised Voltronic Power distributor.
Specifications last updated 23 July 2026
| Default Charging Current | 60A |
|---|---|
| PV Voltage Accuracy | 2V |
| Rated Power | 4500VA/4500W |
| Efficiency (Line Mode) | >95% (Rated R load |
| High Loss Frequency | 65±1Hz |
| High Loss Return Frequency | 63±1Hz |
| High Loss Return Voltage | 270Vac±7V |
| High Loss Voltage | 280Vac±7V |
| Input Voltage Waveform | Sinusoidal (utility or generator) |
| Low Loss Frequency | 40±1Hz |
| Low Loss Return Frequency | 42±1Hz |
| Low Loss Return Voltage | 100Vac±7V (Appliances) |
| Max AC Input Voltage | 300Vac |
| Nominal DC Input Voltage | 24Vdc |
| Nominal Input Frequency | 50Hz/60Hz (Auto detection) |
| Nominal Input Voltage | 230Vac |
| Output Frequency | 50Hz or 60Hz |
| Output Power | 20ms typical (Appliances) |
| Peak Efficiency | 90% |
| Rated Output Power | 3KVA/2.4KW |
| Battery | 28.2 |
| Cold Start Voltage | 23.0Vdc |
| Floating Charging Voltage | 27Vdc |
| Output | Temperature of internal converter |
| Output Short Circuit Protection | Circuit Breaker |
| Output Voltage Regulation | 230Vac± 5% |
| Output Voltage Waveform | Pure Sine Wave |
| Safety Certification | CE |
| Voltage | 230 VAC |
| Selectable Voltage Range | 170-280 VAC (For Personal Computers) |
| Frequency Range | 50 Hz/60 Hz (Auto sensing) |
| AC Voltage Regulation (Batt. Mode) | 230VAC ± 5% |
| Surge Power | 9000VA |
| Efficiency (Peak) | 93% |
| Transfer Time | 10 ms (For Personal Computers) |
| Waveform | Pure sine wave |
| Battery Voltage | 24 VDC |
| Floating Charge Voltage | 27 VDC |
| Overcharge Protection | 33 VDC |
| Solar Charger type | MPPT |
| Maximum PV Array Power | 6500W |
| MPP Range @ Operating Voltage | 60 – 450 VDC |
| Maximum PV Array Open Circuit Voltage | 500 VDC |
| Maximum PV Input Current | 40A |
| Maximum Solar Charge Current | 120A |
| Maximum AC Charge Current | 120A |
| Maximum Charge Current | 120A |
| Communication Interface | USB/RS232/RS485/WiFi/Dry-contact |
| Compliance Safety | IEC 62109, IEC 61683, EN/IEC 61000-6-2, 61000-6-4, 61000-3-11, 61000-3-12 |
| Dimension, D x W x H (mm) | 131 x 336 x 435.5 |
|---|---|
| Net Weight (kgs) | 11.8 |
| Operating Temperature Range | -10°C to 50°C |
|---|---|
| Storage temperature | -15°C~ 60°C |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) |
| Operating Temperature | -10°C to 50°C |








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Read: How to Monitor Voltronic Inverters and UPS via WiFi →4500VA/4500W. The Axpert VM III TRI 4.5K holds 9000VA of surge on top of that rating, regulates its output to 230VAC ± 5% at 50Hz or 60Hz auto detection, and runs at better than 95% efficiency in line mode.
24 VDC. The Axpert VM III TRI 4.5K charges a 24 VDC bank at a 60A default current and up to 120A in total, floats at 27Vdc, starts inverting from 23.0Vdc and stops charging at 33 VDC overcharge protection.
6500W. The MPPT charger on the Axpert VM III TRI 4.5K tracks from 60 - 450 VDC to a 500 VDC open-circuit ceiling, accepts up to 40A of PV input current, reads array voltage to 2V accuracy and charges at up to 120A.
2-Year Manufacturer Warranty. The Axpert VM III TRI 4.5K is CE marked and built to IEC 62109, IEC 61683, EN 61000-6-2, IEC 61000-6-2, EN 61000-6-4, IEC 61000-6-4, EN 61000-3-11, IEC 61000-3-11, EN 61000-3-12 and IEC 61000-3-12.