What the SolaX X1 Boost G4 3.6kW is

SolaX X1 Boost G4 3.6kW Single Phase Solar Inverter is a residential on-grid inverter for medium-scale single-phase solar systems. The exact model is X1-BOOST-3.6-G4, one of the central outputs in the X1 Boost G4 family. That position in the range is useful because it combines a very common domestic output class with the newer family features SolaX gives across the Boost G4 platform, including 200% PV oversizing, 16A input per MPPT, built-in export control, Type II surge protection and cloud-led monitoring support.

For many domestic installations, 3.6kW is a particularly practical size. It offers more AC output than smaller 3.0kW or 3.3kW inverters while still sitting comfortably within the familiar single-phase residential category. That makes it a common target for homes wanting a substantial but not oversized on-grid inverter.

Who it suits

The 3.6kW version suits medium domestic PV systems, especially homes with enough roof space to justify a stronger inverter output while still preferring a compact single-phase unit. It is well matched to split-roof arrays, east-west layouts and residential projects using current-generation panels with higher current characteristics. It can also suit retrofit upgrades where the installer wants a newer inverter with stronger input capability and monitoring options.

The model is particularly useful where two MPPT trackers are needed for roof flexibility. That allows panel groups on different roof planes or with different generation behaviour to be managed more effectively than they would be on a single-tracker inverter.

Key features and practical benefits

• 3680W rated AC output.
• 200% PV oversizing support.
• Dual MPPT design with 16A input per MPPT.
• 50V start-up voltage and up to 600V PV input.
• Built-in export power control.
• Type II surge protection on AC and DC sides.
• Optional AFCI support and rapid shutdown readiness.
• IP66 enclosure and natural cooling.
• SolaXCloud support with 10-second family-level data refresh and WiFi/app setup.

The main practical benefit is design headroom. With a maximum recommended PV array power of 7.2kWp, the 3.6kW model gives installers a generous oversizing margin while staying within a very familiar single-phase AC output level. That can help improve yield capture across the day, particularly in UK conditions where panel arrays do not spend all day at peak nameplate power.

The second benefit is compatibility with current modules. The 16A-per-MPPT input capability makes the inverter a better fit for modern higher-current solar panels than many older domestic inverters that become restrictive at the string design stage.

Technical details that matter in practice

The official X1 Boost G4 datasheet lists X1-BOOST-3.6-G4 at 3680W rated output, 16.0A rated output current, 4048VA maximum apparent power and 17.6A maximum output continuous current. On the PV side, it lists 7.2kWp maximum recommended PV array power, 600V maximum PV input voltage, 50V start-up voltage, 40 to 560V MPPT range, two MPPT trackers in a 1/1 arrangement, 16A maximum input current per MPPT and 22A short-circuit current per MPPT.

Those figures matter because they show the inverter is designed to work with a substantial residential array even though the physical housing remains small. The generous recommended PV array size relative to the AC output rating is part of the reason the model makes sense in UK domestic use, where oversizing can help extract better real-world production across more of the day.

SolaX also lists 98.0% maximum efficiency, 97.0% European efficiency, IP66 protection, natural cooling, 404 x 274 x 146mm dimensions and 11.0kg weight. The product supports RS485 and DRM communication, with optional meter and CT support, and the X1 Boost G4 family is configured through WiFi and app integration with SolaXCloud.

Installation and fitment considerations

The compact housing makes the 3.6kW Boost G4 easy to place in garages, plant areas and exterior wall positions where space is limited. IP66 protection increases mounting flexibility, while natural cooling helps keep operating noise low. For many domestic projects, that matters because the inverter may be positioned relatively close to occupied spaces.

The dual MPPT arrangement is particularly valuable where the roof geometry is less than perfect. Homes with more than one roof face, variable pitch or intermittent shading are more likely to benefit from the flexibility of two independent trackers. The built-in export control function also gives the inverter more relevance where grid export needs to be managed as part of the system design.

Why this exact variant may be the right choice

The X1 Boost G4 3.6kW is the right model when the system needs a little more AC headroom than a smaller domestic inverter, but still benefits from a compact single-phase form factor. It sits in a sweet spot for medium residential arrays because it pairs a very common domestic output size with current-generation input capability and cloud-led monitoring.

Compared with the 3.0kW model, it gives more rated output while keeping the same family features. Compared with a larger 5.0kW or 6.0kW unit, it may be the more proportionate choice for homes where the array and expected demand do not justify going further up the range.

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