What the SolaX X1-BOOST G4 3.6kW is built for

SolaX X1-BOOST G4 3.6kW Single-Phase String Inverter is a single-phase residential on-grid inverter designed for homes that want more array headroom than smaller models can offer, while still keeping system design clean and cost-effective. It sits in a very practical part of the domestic market because it offers enough rated output for a wide range of everyday home PV installations, yet it avoids the larger physical footprint and higher capacity of bigger single-phase units where they are not needed.

Two MPPTs are a major part of that appeal. The 3.6kW version is useful for roofs that are straightforward but still benefit from more than one tracker, and it is equally relevant where module choice or array layout make a one-MPPT product less attractive. Buyers get the broader X1-BOOST G4 platform at this output too, which means built-in export power control, WiFi and app-based configuration, rapid shutdown readiness, SolaXCloud monitoring support and weather-resistant IP66 protection.

Why the 3.6kW version stands out

The strength of this exact model is that it feels proportionate for many domestic systems. It provides 3680W rated output and 4048VA maximum apparent power, while supporting up to 7.2kWp of recommended PV array power through 200% oversizing. That creates a very useful middle ground for homes that want a meaningful solar installation without jumping to the upper end of the single-phase string inverter range.

For installers, that matters because array sizes built around current residential modules can quickly exceed the comfort zone of smaller inverters. The 3.6kW model lets the inverter keep pace with modern panel output while maintaining a compact wall-mounted format. It also keeps the project in a single-phase domestic bracket that feels commercially sensible for many houses, bungalows and retrofit jobs.

Key specifications that matter on site

• 3680W rated output with 4048VA maximum apparent power
• Up to 7.2kWp recommended PV array power with 200% oversizing support
• Dual MPPT layout with one string per tracker
• 40 to 560V MPPT range, 35 to 600V operating range and 50V start-up voltage
• 16A maximum input current and 22A short-circuit current per MPPT
• Type II surge protection on both AC and DC sides
• Built-in export power control and rapid shutdown readiness
• WiFi and app-based configuration with 10-second SolaXCloud refresh
• IP66 enclosure, natural cooling and 404 × 274 × 146 mm dimensions

Those figures have clear practical meaning. Dual MPPT tracking improves system layout flexibility. The broad MPPT range gives a comfortable design window for residential strings. The 50V start-up voltage helps the inverter begin generating promptly as solar conditions improve. The 16A input current per tracker makes the product better aligned with modern high-current modules than older residential designs that offered less headroom.

Protection, safety and monitoring benefits

SolaX specifies a serious protection package for the X1-BOOST G4 family. The 3.6kW version includes active anti-islanding protection, over and under voltage protection, DC isolation protection, DC reverse-polarity protection, grid monitoring, DC injection monitoring and back-feed current monitoring. Type II surge protection is present on both AC and DC sides, and the platform supports AFCI as an optional function. For installers and specifiers, that means a residential inverter that remains compact without feeling lightly equipped.

Monitoring and control are equally important here. SolaX highlights easy configuration via WiFi and app, IV curve scan and 10-second SolaXCloud data refresh. Built-in export power control gives additional design flexibility where export needs to be managed. Those functions are useful because they support commissioning, troubleshooting and day-to-day visibility without burdening the homeowner with an unnecessarily complex interface.

Technical detail with real buyer value

The inverter’s maximum efficiency is 98.0% and European efficiency is 97.0%, with less than 3W power consumption at night. Rated AC voltage is 220 / 230 / 240V and rated AC frequency is 50 / 60Hz. Rated output current is 16.0A and maximum output continuous current is 17.6A. Communication interfaces are listed as RS485 and DRM, with optional meter and CT support. Those are the kind of technical details that influence a smooth installation and sensible system integration rather than simply filling out a datasheet.

Compliance also matters. The X1-BOOST G4 datasheet lists IEC/EN 62109-1 and -2, IEC61727, EN50549, G98/G99, AS 4777.2, VDE4105, CEI 0-21, VFR, PPDS and TOR. For a domestic buyer, those codes may not be the selling point. For installers and procurement teams, they confirm that the product belongs in serious residential specification work rather than in a stripped-back budget segment.

Installation and fitment

The 3.6kW model weighs 11.0kg and uses a compact 404 × 274 × 146 mm housing. That makes it relatively easy to mount on a service wall or in a domestic utility space, garage or sheltered external position. Natural cooling is helpful in homes because it avoids fan noise and reduces moving parts. IP66 ingress protection adds reassurance for exposed installation environments where the siting and surrounding conditions are appropriate.

Because the inverter uses two MPPTs, it is more adaptable than a single-tracker model while remaining simpler than more heavily segmented multi-MPPT products. That makes it especially useful for residential installers who need a practical balance between design flexibility, compact dimensions and sensible system cost.

Who this inverter suits best

The 3.6kW X1-BOOST G4 suits homes that want a stronger everyday solar inverter than the lower-output residential options, especially where roof design benefits from dual MPPT tracking and the array size is large enough to justify extra headroom. It is a strong fit for family homes, bungalows, modest new-build projects and retrofit systems using current higher-output modules. It also makes sense where export control, cloud monitoring and practical protection features are all part of the buying brief.

Among the X1-BOOST G4 options, the 3.6kW version is one of the easiest to recommend because it lands in such a useful middle position. It feels substantial enough for many real domestic systems, yet it still avoids the jump to the largest single-phase outputs where they are not needed.

Final view

SolaX X1-BOOST G4 3.6kW Single-Phase String Inverter is a well balanced residential inverter that combines dual-MPPT flexibility, 200% PV oversizing support and current-generation protective features in a compact IP66 housing. With 3680W rated output, up to 7.2kWp recommended PV array power, WiFi and app-based setup, built-in export power control and Type II SPD on both AC and DC sides, it is a strong choice for UK homes that want a capable single-phase solar inverter without unnecessary size or complexity.

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