The SolaX X1 Mini G4 3.3kW Single Phase String Inverter delivers strong, consistent performance for larger domestic PV systems and small commercial installations across the UK. As the most powerful model in the Mini G4 range, it provides high conversion efficiency, durable protection and flexible communication options in a compact housing designed for the British climate.
High-Efficiency Performance for British PV Systems
With an impressive 97.6% peak efficiency and a wide 55–380V MPPT voltage window, the X1 Mini G4 3.3kW ensures maximum energy yield even during low-irradiance conditions. A low 70V start-up voltage allows the system to begin producing power earlier each day, improving total daily output. This makes it ideal for larger single-phase PV arrays or properties seeking to offset high daytime demand with on-site generation.
Built for Reliability & Protection
Designed for longevity, the IP65-rated enclosure protects against rain, dust and moisture, allowing installation both indoors and outdoors. Fan-free natural cooling keeps the inverter almost silent at under 25dB, ideal for residential environments. Built-in surge, insulation and residual-current protection systems ensure long-term reliability and safety. The inverter meets full G98 and EN 62109 compliance for grid connection and electrical safety across the UK.
Key Features
- Peak efficiency of 97.6% for high energy conversion
- Wide 55–380V MPPT window with 70V start-up voltage
- Quiet, fan-free design (<25dB) with IP65 weatherproof casing
- Optional Wi-Fi or LAN monitoring through SolaX Cloud
- Lightweight 6kg body for easy installation
- Certified to G98 and EN 62109 for UK grid compliance
If you’re wondering how the X1 Mini G4 3.3kW performs under cloudy British conditions, its efficient MPPT tracking and wide voltage tolerance enable steady generation from early morning through to evening, ensuring stable energy output even on overcast days.
Specification data verified from SolaX Power X1 Mini G4 datasheet (v1.1).
Seamless Integration with Solar Panels & Battery Systems
The SolaX X1 Mini G4 3.3kW integrates seamlessly with a wide range of solar panels and battery systems. Its single MPPT design optimises generation for consistent roof orientations, while its compatibility within the SolaX ecosystem allows smooth expansion into hybrid-ready setups. DC coupling minimises energy loss, improving self-consumption efficiency and supporting a future-ready renewable system for British households.
Smart Monitoring & Connectivity
Featuring SolaX Cloud monitoring with Wi-Fi, LAN or optional 4G modules, this inverter offers full transparency of performance and system health. Homeowners and installers can access live and historical data to track generation trends or identify issues quickly. Built-in RS485 and DRM ports support integration with metering and smart control systems, allowing easy compatibility with modern home energy management setups.
Compact Design & Installation Efficiency
At just 267×328×116mm and 6kg, the X1 Mini G4 3.3kW combines exceptional output with a small physical footprint. The IP65-rated housing protects against rain and dust for both indoor and outdoor use, while its fanless, naturally cooled design ensures silent and low-maintenance operation. Quick-fit connections and a clean wiring layout reduce installation time for professional installers.
Installer Guidance & System Notes
String design & MPPT layout
Maintain the 55–380V MPPT range and ensure current limits are observed. The single MPPT is ideal for consistent roof angles and unshaded systems where simplicity and stability are priorities.
Battery configuration & sizing
The X1 Mini G4 3.3kW integrates within the SolaX ecosystem, allowing hybrid-ready operation with compatible battery systems. UK homes typically benefit from 5–10kWh of storage for balanced day-night self-consumption.
Grid compliance & safety
Fully certified to G98 and EN 62109, featuring built-in residual-current, insulation and surge protection for safe grid operation and reduced installation complexity.
Why We Recommend the SolaX X1 Mini G4 3.3kW
At LAMPS, we recommend the X1 Mini G4 3.3kW for larger single-phase systems seeking the perfect balance of size, performance and reliability. Its efficiency, robust IP65 build and silent operation make it an outstanding inverter for the UK’s variable weather conditions. With proven stability, user-friendly monitoring and trusted SolaX engineering, it’s a long-term investment for dependable solar generation.
LAMPS is the renewable division of LAMPS Electrical — a trusted independent wholesaler with over 15 years of experience supplying professional installers across the UK. Our team provides verified technical information, UK-based support and reliable access to leading renewable brands.
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 2.5kW |
3250 |
2500 |
1 |
55–380 |
97.5% |
267×328×116 |
6.0 |
| X1 Mini G4 0.7kW |
910 |
700 |
1 |
55–380 |
97.1% |
267×328×116 |
6.0 |
FAQs – SolaX X1 Mini G4 3.3kW
How does the X1 Mini G4 3.3kW differ from the 2.5kW version?
The 3.3kW version offers higher AC output and PV input capacity, ideal for larger domestic systems or properties with greater daytime usage.
Is it compatible with SolaX batteries?
Yes — it can connect within the SolaX hybrid-ready ecosystem and support modular battery expansion for increased self-consumption.
Can it be installed outdoors?
Yes, the IP65 enclosure ensures complete protection from dust and rain, making it suitable for external or internal installation.
How can I monitor performance?
Through SolaX Cloud — Wi-Fi and LAN connectivity are standard, with optional 4G modules for remote or rural sites.
What are its dimensions and weight?
The inverter measures 267×328×116mm and weighs approximately 6kg.
For professional advice or system compatibility checks, contact LAMPS — trusted UK distributor of SolaX, Growatt, and Fox ESS solar inverters.
