SolaX X3 Ultra 20kW Three Phase Hybrid Inverter

£2230.50

The SolaX X3 Ultra 20kW inverter is designed for large-scale three-phase solar and battery systems, enabling fast, efficient, and reliable power management.

Up to 200% PV input for high-yield systems
Dual battery and MPPT inputs for flexibility
Fast 50A charge/discharge for energy efficiency

Why we recommend this product: The 20kW Ultra delivers serious output and battery performance, ideal for commercial-scale solar systems with heavy usage demands.

SKU: X3-ULT-20K

Free and easy returns | Easy to Install | Professional Installers Available

Pallet Delivery *

SolaX X3 Ultra 20kW: High-Performance Hybrid Inverter for Demanding 3-Phase Installations

If you're planning a serious solar and storage setup for a commercial or large-scale property, the SolaX X3 Ultra 20kW inverter is engineered to deliver power and flexibility where it matters. With dual battery ports, high charge rates, and advanced control, it’s the ideal solution for installers who don’t compromise on performance.

Massive PV Oversizing & Dual Battery Control

This inverter supports up to 200% PV oversizing and comes with dual MPPT inputs and battery ports. This means you can run complex systems with independent battery control, fine-tuning your solar investment to match changing demands and energy tariffs.

Dual 30A battery ports with 50A charge/discharge capacity
Up to 30kWp PV input for maximum generation
Supports parallel battery configurations

Reliable Power and Intelligent Energy Management

Integrated EPS (emergency power supply), intelligent load shifting, and full compatibility with the mySolaX cloud system make this inverter smart enough for future-ready installations. Works perfectly with Solax LFP batteries and other Modbus BMS options.

EPS backup with 10ms switchover
Smart load shifting for tariff-based charging
Works with Solax and third-party battery systems

Designed for Large Homes and Commercial Applications

Whether you're installing on large residential premises, commercial facilities, or high-demand agricultural sites, the 20kW Ultra handles the load with efficiency and reliability.

Why Evergy Recommends This Product

It supports advanced 3-phase hybrid solar and battery installations
High-speed charge/discharge improves ROI on battery investment
Exceptional flexibility with multiple strings and battery types

Technical Specifications

Max PV Input: 30kW (200% oversizing supported)
AC Output Power: 20kW
Battery Discharge Rate: 50A
Backup EPS Output: 20kW

See the Specification tab or refer to the SolaX Ultra product page for full technical details.

Delivery

This item qualifies for free UK delivery. Larger orders may require pallet shipping. visit the Delivery Information tab for details.

Looking to Expand Your System?

Consider the 25kW Ultra or 30kW Ultra for larger-scale setups.

We also recommend viewing compatible LFP batteries and our full inverter range.

Attribute name	Attribute value
Max Input DC Power	40,000W
IP Rating	IP66
Rated Power	20,000W
Battery Compatibility	Lithium-ion, 120-800V
MPPT Quantity	2
DC Start-up Voltage	200V
Backup Capability	EPS with <10ms switch time
Max Charge/Discharge Current	60A

X3-ULT-20K

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.

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).