What the product is and who it suits

SolaX X1 Mini G4 3.3kW is the highest-output model in this X1 Mini G4 group and is aimed at larger single-phase one-string PV systems that still want a compact wall-mounted inverter. It remains part of SolaX’s residential on-grid string inverter family, but it sits at the top end of the Mini range for buyers who need more PV allowance and more output than the smaller Mini G4 units can provide.

This exact X1-MINI-3.3K-G4 variant suits larger domestic rooftops, stronger one-string layouts and retrofit projects where inverter space is limited but the array is more ambitious. It is a particularly good fit where the designer wants to stay with one MPPT and one string for simplicity, yet still needs the best headroom available in the Mini chassis.

Like the rest of the range, this is an on-grid string inverter rather than a hybrid storage inverter. The buying case is therefore built around efficient solar conversion, export control, monitoring support and compact installation rather than direct battery charging functions.

Key features and practical benefits

SolaX lists the X1-MINI-3.3K-G4 with 3300W rated output power, up to 6.6kWp recommended PV array power, 1 MPPT in a 1/1 layout and 16A maximum input current. The official product page also lists a 40 to 550V MPPT voltage range for this model. Those figures make it the clear step-up option where a larger one-string array needs more inverter headroom while still staying in the Mini G4 category.

The platform also includes 200% PV oversizing, 16A input support for high-power panels, global MPP tracking with shade optimisation, 10-second data refresh on SolaXCloud, I-V curve diagnosis, built-in export control and smart loads management. Those features give the 3.3kW version a stronger technical case than a simple model-name increase alone would suggest.

• 3300W rated output power
• Up to 6.6kWp recommended PV array power
• 1 MPPT with 1/1 string layout
• 40 to 550V MPPT voltage range
• 16A maximum input current per MPPT
• Built-in export control and smart loads management

Installation, protection and operating detail

SolaX lists IP66 ingress protection for the X1 Mini G4 family and includes Type II surge protection on the AC and DC side, ready-for-rapid-shutdown support and optional AFCI. Those are strong safety and protection features for a compact residential inverter and help make the 3.3kW model suitable for indoor or outdoor installation when sited correctly.

For this variant, SolaX lists dimensions of 290 x 206 x 120mm and a net weight of 5.5kg. That keeps the inverter compact and manageable while still offering the largest output in this Mini G4 group. Natural cooling keeps the platform simple and maintenance-light, which is attractive on domestic and small commercial projects alike.

The latest official datasheet lists 98.0% maximum efficiency across the series, with communications listed as RS485, DRM and optional meter or CT support. In practice, that means the inverter remains compatible with smarter monitoring and export-control strategies while keeping the product itself compact.

Why this variant may be the right choice

The 3.3kW version is the right fit where a project needs the largest PV allowance and highest output in this Mini G4 batch, but still wants the compact one-string logic of the smaller models. That can be especially useful on larger domestic arrays where roof geometry is consistent and the designer wants to avoid moving into a bigger multi-MPPT chassis.

It is also a strong choice for buyers who want the most capable compact SolaX on-grid inverter in this particular group. The higher output and larger 6.6kWp PV allowance make it the best option here when the site genuinely needs more headroom.

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