SolaX X1 Mini G4 2.5kW Single Phase String Inverter

£271.30

The SolaX X1 Mini G4 2.5kW string inverter is designed for UK residential and light-commercial PV systems requiring higher output without compromise on efficiency or flexibility. With a wide 55–380V MPPT window and a low start-up voltage of 70V, it maximises generation even under typical British overcast conditions. Peak efficiency reaches 97.5%, supporting best-in-class performance for homes with larger rooftop arrays.

Featuring a weatherproof IP65 enclosure and silent, fan-free operation (<25dB), the X1 Mini G4 2.5kW is suitable for outdoor wall or internal plant-room installation. It meets EN 62109 and UK grid standard G98, giving installers and homeowners assurance of compliance and long-term reliability. Built-in monitoring connectivity via Wi-Fi/LAN and RS485/DRM ensures simple integration into control systems.

Combine with quality solar panels and robust mounting solutions from Evergy to build a strong photovoltaic system foundation.

Contact Evergy for product guidance or system compatibility support.

SKU: X1-MINI-2.5K-G4

Qty:

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

The SolaX X1 Mini G4 2.5kW Single Phase String Inverter offers exceptional conversion efficiency and robust design for small to medium-sized PV systems across the UK. As part of the Mini G4 series, it delivers premium performance and easy installation for residential rooftops or small commercial premises, combining reliability, compactness and intelligent monitoring.

High-Efficiency Performance for British PV Systems

With peak efficiency up to 97.5%, the X1 Mini G4 2.5kW ensures that every kilowatt of solar generation is captured and converted effectively. Its wide 55–380V MPPT operating range and low 70V start-up voltage maintain output even under cloudy or shaded conditions typical in British weather. This makes it ideal for split or multi-orientation roof systems where steady generation is crucial.

Built for Reliability & Protection

The inverter’s IP65 weatherproof rating allows for flexible indoor or outdoor installation, while its fanless natural cooling keeps sound levels below 25dB. It includes Type II DC and AC surge protection, insulation monitoring and integrated residual-current detection for safe operation. Fully compliant with G98 and EN 62109 standards, it provides reliable performance across all UK grid conditions.

Key Features

Up to 97.5% maximum efficiency for higher energy yield
Wide 55–380V MPPT window with 70V start-up voltage
Compact, lightweight (6kg) design for quick wall mounting
IP65 weather-resistant housing and quiet fan-free cooling
Smart monitoring via SolaX Cloud using Wi-Fi or LAN
Compliant with G98 and EN 62109 for grid-connected safety

If you’re wondering how the X1 Mini G4 2.5kW performs across varied British conditions, its wide MPPT range and low-voltage start-up ensure early-morning generation, stable mid-day performance and consistent yield — even when partial shading or variable roof angles are present.

Specification data verified from SolaX Power X1 Mini G4 datasheet (v1.1).

Seamless Integration with Solar Panels & Battery Systems

The SolaX X1 Mini G4 2.5kW inverter is engineered to integrate smoothly with modern solar panels and battery storage options. Its single-MPPT layout provides efficient control for smaller arrays or uniform roof pitches. When paired within the SolaX ecosystem, it allows straightforward DC coupling with compatible battery systems, enabling flexible self-consumption or future hybrid upgrades as energy requirements grow.

Smart Monitoring & Connectivity

Equipped with SolaX Cloud connectivity, the X1 Mini G4 2.5kW offers remote performance tracking via Wi-Fi, LAN, or optional 4G connection. Installers can easily configure settings, view live performance metrics, and perform remote diagnostics. Standard communication ports including RS485 and DRM ensure compatibility with metering devices and third-party monitoring solutions, simplifying integration for professional installations.

Compact Design & Practical Installation

At just 6kg and measuring 267×328×116mm, this inverter fits comfortably into tight spaces while maintaining easy access for installation. Its IP65-rated aluminium body provides complete protection against rain and dust. The fanless design ensures silent operation, ideal for both indoor and outdoor use. Quick-fit connections and a simplified layout save time for installers during commissioning.

Installer Guidance & System Notes

String design & MPPT layout

Operate within the 55–380V MPPT window, ensuring optimal voltage balance. The single MPPT design is suited for uniform arrays with consistent orientation and shading patterns.

Battery configuration & sizing

Designed to operate seamlessly with SolaX battery systems, the X1 Mini G4 range can support modular storage configurations from 3–6kWh and beyond, expanding with future demand.

Grid compliance & safety

Certified for G98 and EN 62109 grid standards. Features include integrated RCMU, surge protection, and insulation monitoring for installer assurance.

Why We Recommend the SolaX X1 Mini G4 2.5kW

At Evergy, we recommend the X1 Mini G4 2.5kW for UK homes needing higher single-phase capacity without complexity. It combines reliability, compact design, and high conversion efficiency for year-round consistency under British weather. Trusted by installers for its robust IP65 build and intuitive cloud monitoring, it’s a strong performer for both new and retrofit systems.

Evergy is the renewable division of LAMPS Electrical — a long-standing independent wholesaler supporting UK installers for over 15 years with expert advice, verified products, and dependable supply across solar and EV technology.

Compare in the SolaX X1 Mini G4 Range

Model	Max PV (W)	Rated AC (W)	MPPTs	MPPT Window (V)	Max Eff.	Dimensions (mm)	Weight (kg)
X1 Mini G4 1.5kW	1950	1500	1	55–380	97.3%	267×328×116	6.0
X1 Mini G4 3.3kW	4290	3300	1	55–380	97.6%	267×328×116	6.0

FAQs – SolaX X1 Mini G4 2.5kW

How does the X1 Mini G4 2.5kW differ from the 1.5kW version?

The 2.5kW version delivers more AC output and supports larger solar arrays, making it ideal for medium-sized UK homes or small commercial applications.

Is it compatible with SolaX batteries?

Yes — it integrates seamlessly with SolaX battery systems for hybrid-ready or self-consumption setups.

Can it be mounted outdoors?

Yes, the IP65-rated housing protects against rain and dust, suitable for outdoor installations.

How is performance monitored?

Via the SolaX Cloud platform using Wi-Fi, LAN or 4G connectivity for live and historical data access.

What are the dimensions and weight?

The unit measures 267×328×116mm and weighs approximately 6kg.

For tailored system design advice or compatibility checks, contact Evergy — trusted UK distributor for SolaX, Growatt, and Fox ESS solar products.

Attribute name	Attribute value
Features	Supports external rapid shutdown, optimised monitoring, compatible with AC-coupled battery systems
IP Rating	IP66
Rated Power	2500W
Max Input Voltage	550V
MPPT Quantity	1
DC Start-up Voltage	50V
Efficiency	98%

X1-MINI-2.5K-G4

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).

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