Picture of SolaX X3 Ultra 15kW Hybrid Inverter
Picture of SolaX X3 Ultra 15kW Hybrid Inverter
Picture of SolaX X3 Ultra 15kW Hybrid Inverter

SolaX X3 Ultra 15.0kW Three-Phase Hybrid Inverter

£2003.48

Power up advanced commercial solar systems with the SolaX X3-Ultra 15.0kW – a robust hybrid inverter built to balance high-efficiency solar, battery, and grid input with precision and intelligence.

  • Hybrid Intelligence: Manages PV, grid and lithium-ion storage (120–800V) with 60A charge/discharge and AI energy forecasting.
  • Resilient Backup Power: Switches to EPS in under 10ms with 200% peak power for 10 seconds – supporting half-wave loads and generator input.
  • Triple MPPT, 200% Oversizing: 3 MPP trackers (2 strings each), 36A per input, supports 30kW PV array and 1000V max DC voltage.

Why We Recommend This Product

The X3-Ultra 15K sets the standard for mid-sized commercial hybrid inverters with triple MPPTs, dual battery ports, and market-leading backup features for resilient power continuity.

SKU: X3-ULT-15K
Free and easy returns | Easy to Install | Professional Installers Available
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SolaX X3-Ultra 15.0kW Three-Phase Hybrid Inverter

The SolaX X3-Ultra 15K is a premium hybrid inverter designed for commercial and industrial sites where energy independence, battery integration, and grid resilience are essential. This 15kW model brings together intelligent controls, high-efficiency solar conversion, and a robust EPS system – all engineered to deliver around-the-clock reliability in real-world installations.

High-Capacity, Triple MPPT PV Input

With three independent MPPTs supporting two strings each, the X3-Ultra 15K allows for versatile array layouts and effective partial shading mitigation. Each tracker supports:

  • 36A input current and 45A short circuit rating – ideal for modern high-output PV modules.
  • MPPT voltage range: 160–950V with a 1000V max input – offering broad compatibility with system sizes up to 30kW.
  • 200% PV oversizing: Optimised to accept arrays up to 30kW on a 15kW output inverter, boosting generation in low-light conditions.

Advanced Hybrid Storage with Dual Battery Ports

This model supports two independent battery banks (lithium-ion, 120–800V), allowing flexible energy storage expansion. Key features include:

  • 60A charge/discharge rate: Each battery port enables high throughput for fast cycling and response.
  • Independent battery control: Allows future retrofitting or scaling of capacity without replacing the inverter.
  • Smart scheduling: Supports 7x24h load management across all sources, with user-defined grid interaction settings.

Powerful Emergency Backup (EPS) Capabilities

In the event of grid failure, the X3-Ultra 15K delivers:

  • Switch-over in <10ms – seamless backup ensures no interruption for connected loads.
  • EPS peak output: Delivers up to 30kW (200% of rated output) for 10 seconds – critical for motor starts and load spikes.
  • Half-wave load support: Operates even with challenging or inductive loads.
  • EPS usable without battery: Inverter can support loads directly from PV during daylight hours in EPS mode.

Grid-Ready, Microgrid Compatible & AI-Controlled

Built for the smart grid era, the X3-Ultra series enables sophisticated energy routing and connectivity:

  • AI Energy Forecasting: Predicts solar production and consumption trends to enhance efficiency.
  • Virtual Power Plant (VPP) Ready: Compatible with aggregators and cloud-based dispatch systems via SolaX Cloud.
  • Wireless metering support: Enables simplified installation and remote diagnostics.
  • Supports generator integration: Ideal for off-grid hybrid or backup-augmented solar systems.

Robust Safety & Protection Features

The unit is engineered for maximum resilience and grid compliance, featuring:

  • IP66-rated enclosure: Withstands dust and heavy rain for outdoor installation.
  • Type II surge protection: Installed on both AC and DC circuits to guard against grid spikes.
  • Full protection suite: Includes AFCI (optional), insulation monitoring, DC polarity reversal, AC overcurrent/overvoltage, and thermal protection.
  • Low night-time consumption: <10W standby load keeps operating costs minimal.

Why Evergy Recommends This Product

  • Commercial-Ready Performance: Designed for mid-scale hybrid PV systems with demanding load requirements.
  • Unmatched Backup Reliability: Near-instant switchover, 200% peak EPS power, and resilience against wave distortions.
  • Smart Grid Future-Proofing: Equipped for VPP, microgrid use, AI-based control, and scalable battery design.
  • Durable & Compliant: Certified for UK and European grid codes, including G99, EN50549, and VDE4105.

Technical Specifications Highlights

  • Rated Output Power: 15kW
  • Max PV Input: 30kW (200%) / 1000V DC max / 3 MPPTs
  • Battery Range: 120–800V (Li-ion), 60A bi-directional
  • EPS Output: 30kW peak for 10s / <10ms transfer
  • Efficiency: Max 98%, MPPT 99.9%
  • Protection Rating: IP66
  • Dimensions: 696 × 526 × 240 mm
  • Weight: 47 kg

Explore the X3-Ultra Family

Delivery & Installation Support

This model qualifies for free UK shipping. For full hybrid setups, we strongly recommend using an MCS-certified commercial solar installer. Contact us to discuss sizing, battery pairings, and delivery lead times.

Attribute nameAttribute value
Max Input DC Power40,000W
IP RatingIP66
Rated Power15,000W
Battery CompatibilityLithium-ion, 120-800V
MPPT Quantity2
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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SolaX X3 Ultra 15kW Hybrid Inverter

Power up advanced commercial solar systems with the SolaX X3-Ultra 15.0kW – a robust hybrid inverter built to balance high-efficiency solar, battery, and grid input with precision and intelligence.

  • Hybrid Intelligence: Manages PV, grid and lithium-ion storage (120–800V) with 60A charge/discharge and AI energy forecasting.
  • Resilient Backup Power: Switches to EPS in under 10ms with 200% peak power for 10 seconds – supporting half-wave loads and generator input.
  • Triple MPPT, 200% Oversizing: 3 MPP trackers (2 strings each), 36A per input, supports 30kW PV array and 1000V max DC voltage.

Why We Recommend This Product

The X3-Ultra 15K sets the standard for mid-sized commercial hybrid inverters with triple MPPTs, dual battery ports, and market-leading backup features for resilient power continuity.

£2003.48
Picture of SolaX X3 Ultra 15kW Hybrid Inverter
Picture of SolaX X3 Ultra 15kW Hybrid Inverter
Picture of SolaX X3 Ultra 15kW Hybrid Inverter

SolaX X3 Ultra 15.0kW Three-Phase Hybrid Inverter

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