Picture of SolaX X3 Ultra 25kW Hybrid Inverter (3-Phase)
Picture of SolaX X3 Ultra 25kW Hybrid Inverter (3-Phase)
Picture of SolaX X3 Ultra 25kW Hybrid Inverter (3-Phase)

SolaX X3 Ultra 25kW Three Phase Hybrid Inverter

£2384.95

The SolaX X3 Ultra 25kW inverter is built for serious solar and storage systems, offering heavy-duty three-phase hybrid performance with smart battery integration.

  • Handles up to 37.5kW PV input (150% oversizing)
  • Dual battery ports and 50A charge/discharge
  • Fast EPS switchover and full backup capability

Why we recommend this product: Perfect for commercial sites or large properties looking to maximise solar savings with battery support and high output.

SKU: X3-ULT-25K
Free and easy returns | Easy to Install | Professional Installers Available
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SolaX X3 Ultra 25kW: Smart Three-Phase Inverter for Scalable Solar & Storage

Built for big energy needs, the SolaX X3 Ultra 25kW inverter enables flexible solar and battery system design for three-phase commercial and residential sites. With dual battery ports, fast switching backup, and support for high PV loads, it's engineered to support complex installations with ease.

High PV Input, Dual MPPT & Battery Support

The X3 Ultra 25kW supports up to 37.5kW PV input and offers dual MPPT and dual battery ports. That means you can connect larger arrays and more storage capacity with intelligent energy management and full Modbus BMS compatibility.

  • 150% PV oversizing supported
  • Dual 30A battery ports with 50A max discharge
  • Works with Solax and third-party batteries

Emergency Backup & Smart Load Control

This model includes EPS backup mode with a 10ms switchover. It’s ideal for keeping critical loads powered during outages. Built-in smart load shifting ensures you make the most of variable energy tariffs and solar production.

  • Integrated emergency power output
  • 10ms switchover for seamless operation
  • Supports grid export limits and energy scheduling

Perfect for Larger Systems

The 25kW Ultra is suited to large residential properties, commercial installations, and energy-hungry businesses aiming to cut costs and boost sustainability with scalable solar and storage setups.

Why Evergy Recommends This Product

  • Ideal for 3-phase hybrid systems with high load
  • Dual battery and MPPT input for advanced flexibility
  • Reliable EPS backup and smart control options

Technical Specifications

  • AC Output: 25kW
  • Max PV Input: 37.5kW
  • Max Discharge Rate: 50A
  • EPS Output: 25kW

For full details, see the Specification tab or the SolaX product page.

Delivery

Free UK delivery available on this inverter. Large orders may be sent via pallet. See our Delivery Information page for more.

Other Sizes Available

If you need a different output, check out the 20kW Ultra or the 30kW Ultra for heavier loads.

Attribute nameAttribute value
Max Input DC Power50,000W
IP RatingIP66
Rated Power25,000W
Battery CompatibilityLithium-ion, 120-800V
MPPT Quantity3
DC Start-up Voltage200V
Backup CapabilityEPS with <10ms switch time
Max Charge/Discharge Current60A
SOLAX

Established in 2012, SolaX is an internationally renowned provider of photovoltaic energy storage systems. They offer energy storage inverters, batteries, and grid-connected solutions to customers worldwide. SolaX ranks among the top three globally in market share for household photovoltaic energy storage systems.

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Free delivery - 

NEXT DAY Delivery to Oxfordshire, Buckinghamshire and London via an EVERGY vehicle. Max of 1 ton weight.

 

Other delivery options via courier - 

FREE NEXT DAY (*orders over £50, some batteries and inverters will require an additional fee) via FEDEX. Monday to Friday, up to 30kg, Max box size 50cm x 50cm x 50cm (volume). Orders must be received by 2pm.

Anytime NEXT DAY delivery – under £50 = £6.50 (depending on location, weight and size)

 

Regardless of spend, additional to any of the above charges – 

Before noon (FedEx Priority Express) = Guide Price £15.00 (calulated at checkout)

Before 10am (FedEx First) = Guide Price £20.00 (calulated at checkout)

 

Delivery of pallets - 

Palletised deliveries – Prices starting at £58

Multiple pallet orders can be quoted upon request (price dependent on number of pallets and postcode area)


Special delivery items may vary (non-stock products).

SAME DAY COLLECTION - Click & collect from Evergy Stores (Thame, Oxfordshire).

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Picture of SolaX X3 Ultra 25kW Hybrid Inverter (3-Phase)
Picture of SolaX X3 Ultra 25kW Hybrid Inverter (3-Phase)
Picture of SolaX X3 Ultra 25kW Hybrid Inverter (3-Phase)

SolaX X3 Ultra 25kW Three Phase Hybrid Inverter

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