The SolaX X1 Hybrid G4 3.7kW Single-Phase Hybrid Inverter combines intelligent power management with proven reliability, making it an ideal choice for UK homeowners and small commercial projects seeking seamless solar-to-battery integration. Compact yet powerful, it offers clean conversion efficiency, advanced protection, and easy connectivity through SolaX Cloud monitoring.
High-Efficiency Performance for British PV Systems
Designed for modern hybrid systems, the X1 Hybrid G4 3.7kW operates across a broad 70–550V DC input window to maximise solar harvest under real-world British conditions. Its dual MPPT trackers achieve up to 97.6% peak efficiency, maintaining consistent yield even on shaded or multi-aspect roofs. A rapid 99% MPPT response rate ensures panels perform near their optimum output at all times.
Engineered for Long-Term Reliability & Protection
Every detail of the SolaX X1 Hybrid G4 is built for durability and safety. The IP65-rated aluminium enclosure provides full weather protection, while passive cooling keeps sound levels below 30dB — ideal for outdoor or utility-room installation. Integrated surge protection and residual-current monitoring deliver an extra layer of resilience, and full compliance with G99 and EN 62109 ensures grid-ready operation across the UK.
Key Features
- Dual MPPT inputs with 99% tracking accuracy for complex roof layouts
- Peak efficiency 97.6% / Euro efficiency 97%
- IP65 fan-free design for quiet, maintenance-free operation
- Supports high-voltage LFP batteries with 30A charge/discharge rate
- Integrated SolaX Cloud monitoring via Wi-Fi / LAN / RS485 (4G optional)
- Certified to EN 62109 and G99 for UK grid connection
If you’re wondering how efficient the X1 Hybrid G4 3.7kW remains in low-light or cloudy weather, its 70–550V operating range and fast MPPT tracking maintain generation throughout the day — a vital advantage under typical UK irradiance conditions.
Specification data verified from SolaX Power X1 Hybrid G4 documentation (Version 1.0).
Seamless Integration with Solar Panels & Battery Storage
The SolaX X1 Hybrid G4 3.7kW integrates effortlessly with solar panels and battery systems, enabling homeowners to store excess solar energy for later use. Its high-voltage LFP battery compatibility supports up to 30A charge and discharge, delivering fast, efficient power transfer and flexible load management. With direct DC coupling, the inverter minimises conversion losses, increasing system efficiency and overall return on investment for UK installations.
Smart Monitoring & Connectivity
Built with installers and homeowners in mind, the X1 Hybrid G4 features full connectivity through SolaX Cloud. Real-time monitoring, performance analytics, and remote firmware updates keep systems running smoothly with minimal intervention. Connectivity options include Wi-Fi and LAN as standard, with RS485, CAN, USB, and optional 4G expansion for off-site locations. Local data logging ensures no information is lost, even if the internet connection drops temporarily.
Compact Design & Rugged Construction
Measuring approximately 460×510×185mm and weighing just 20kg, the X1 Hybrid G4 3.7kW offers a high power-to-size ratio. Its IP65 aluminium housing and passive cooling allow for quiet operation (<30dB) in both indoor and outdoor environments. Designed for UK conditions, it’s ideal for wall-mounted installations in garages, plant rooms or sheltered outdoor spaces.
Installer Guidance & System Notes
String design & MPPT layout
Optimise performance using the 70–550V MPPT window and maintain balanced current limits (12A per tracker). For split-orientation or shaded roofs, dedicate one MPPT to each string to achieve consistent yield.
Battery configuration & sizing
Start with a 5–10kWh battery configuration for typical UK homes and expand as demand grows. The inverter supports scalable storage up to approximately 25kWh without hardware modification.
Grid compliance & safety
Compliant with G99 and EN 62109 safety standards. Built-in insulation monitoring and surge protection provide extra peace of mind for installers and homeowners.
Why We Recommend the SolaX X1 Hybrid G4 3.7kW
At LAMPS, we recommend the X1 Hybrid G4 3.7kW for its high conversion efficiency, intelligent hybrid functionality, and strong reliability in British weather conditions. The IP65-rated build, silent operation, and flexible communications make it a trusted option for domestic solar systems requiring long-term dependability.
LAMPS is the renewable division of LAMPS Electrical — an independent UK wholesaler with over 15 years of experience supporting solar professionals nationwide. Our technical team in Oxfordshire provides guidance on design, compatibility and aftersales support to ensure every project performs at its best.
Compare in the SolaX X1 Hybrid G4 Range
| Model |
Max PV (W) |
Rated AC (W) |
MPPTs |
MPPT Window (V) |
Max Eff. |
Dimensions (mm) |
Weight (kg) |
| X1 Hybrid G4 3.7kW |
5,500 |
3,680 |
2 |
70–550 |
97.6% |
460×510×185 |
20 |
| X1 Hybrid G4 5kW |
7,500 |
5,000 |
2 |
70–550 |
97.6% |
460×510×185 |
20 |
FAQs – SolaX X1 Hybrid G4 3.7kW
How does the 3.7kW model differ from the 5kW version?
The 3.7kW delivers 3,680W AC output, making it ideal for smaller or single-string residential systems, while the 5kW model supports larger arrays with higher PV input capacity.
Is it compatible with SolaX batteries?
Yes — it supports the SolaX Triple Power and other high-voltage LFP battery ranges for scalable storage expansion.
Can it be mounted outdoors?
Yes. The IP65-rated aluminium enclosure and fanless cooling design allow for safe, quiet installation outdoors or in garages.
How can I monitor the system?
Through SolaX Cloud — providing real-time data, performance history, and optional 4G access for remote sites.
What are the product dimensions and weight?
The inverter measures approximately 460×510×185mm and weighs around 20kg.
For tailored guidance on system compatibility or professional installation advice, contact LAMPS — your trusted UK supplier of solar inverters, batteries, and solar panels.
