What the product is and who it suits

SolaX X1 Hybrid G4 3.7kW is a single-phase hybrid storage inverter designed for domestic installations that want more control over how solar energy is generated, stored and used. It is a good fit for smaller homes, lower-consumption households, carefully sized retrofit systems and first-time battery-ready installations where a larger hybrid inverter would be unnecessary.

The main attraction of this exact model is balance. It gives a homeowner access to the same broader X1 Hybrid G4 platform features as the larger models, but in a size that is easier to match to smaller arrays and more modest electrical demand. That means the buyer does not have to sacrifice hybrid control, EPS behaviour or smart management features simply because the property does not need 5kW or 7.5kW of output.

SolaX also makes clear that the X1 Hybrid G4 series sits within a broader storage ecosystem. On the official product page, the X1 Hybrid G4 combined with the T30 battery and the Matebox forms the X-ESS G4. That confirms the product is intended to operate as part of a thoughtful storage solution rather than as a basic solar inverter with limited add-on capability.

Key features and practical benefits

For the X1-HYBRID-3.7-D, SolaX lists 3680W rated output power, up to 7.4kWp recommended PV array power, a 70 to 550V MPPT range, 2 MPPT trackers with a 1/1 string layout and 16A maximum input current per MPPT. Those figures make the model well suited to domestic roofs split across two aspects, or to installations where the designer wants some freedom in string layout without moving to a higher-output inverter.

SolaX also highlights broader X1 Hybrid G4 advantages such as up to 200% PV oversizing, up to 110% AC output, low start-up voltage for longer operation and up to 97% efficiency in charging and discharging. In day-to-day terms, those features help the inverter make better use of available solar generation and storage capacity across variable operating conditions.

• 3680W rated output power
• Up to 7.4kWp recommended PV array power
• 2 MPPTs with 1/1 string layout
• 70 to 550V MPPT voltage range
• 16A maximum input current per MPPT
• Up to 150% EPS output for 10 seconds with less than 10ms switchover

Installation, protection and compatibility

This model carries IP65 protection, so it is suitable for properly planned indoor or outdoor installation. The official product page lists dimensions of 482 x 417 x 181mm and a net weight of 25kg for the X1-HYBRID-3.7-D. That keeps it within a compact wall-mounted format that works well in utility spaces, garages and other typical domestic inverter locations.

SolaX lists Type II surge protection on the AC and DC side on the X1 Hybrid G4 page, and official documentation for the series also includes EN/IEC 62109 and G99 coverage. These are important practical details because they speak to real installation standards, grid compliance and long-term protection rather than generic marketing claims.

The platform’s management features are another reason the inverter stands out. SolaX highlights VPP readiness, global MPP scan, smart load management, intelligent time-of-use driven energy management and CT compatibility with fast load response. Official documentation also shows CT or meter support, external control via RS485 and optional Pocket communication accessories. For homeowners using time-based tariffs or planning a more intelligent storage setup, these features add real value.

Why this variant may be the better fit

The 3.7kW model is the right choice where a solar-plus-storage system needs hybrid intelligence more than sheer output. For smaller homes or more modest arrays, it often makes more sense than stepping up to the X1 Hybrid G4 5kW or the larger X1 Hybrid G4 7.5kW just for the sake of headline power.

That makes it a particularly good fit for customers who want to keep system design tight and well matched to the property. It still gives access to the same X1 Hybrid G4 storage-ready architecture, but in a smaller and more appropriate power class for many domestic sites.

Frequently asked questions

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