SolaX X3-EVO 10.0 T Three-Phase Residential Unit Test

SolaX X3-EVO 10.0 T - Overview

The SolaX X3-EVO 10.0 T is a 10 kW three-phase hybrid solar inverter designed for residential installations that need both on-grid export and battery storage capability. It replaces the X3 Hybrid Gen 4 in the SolaX lineup with improved EPS (Emergency Power Supply) performance and a higher maximum DC input voltage of 1100 V, which allows longer string runs without additional DC cabling.

The critical point to establish upfront: the X3-EVO requires a high-voltage (HV) battery to function in hybrid mode. It is not compatible with low-voltage (LV) batteries like the T-BAT SBR series. If you're considering the X3-EVO as an inverter to pair with the T-BAT SBR, stop - you need the X1 or X3 Hybrid Gen 4 for that. The X3-EVO pairs with SolaX T-BAT HV, BYD Battery-Box Premium HVS, or other HV-compatible systems.

Why Three-Phase at 10 kW

Three-phase hybrid inverters at the 10 kW level suit homes and small commercial sites with three-phase grid connections. In most European markets, properties above 3.5 kWp of PV capacity are strongly recommended to install three-phase inverters to comply with grid balancing requirements and avoid single-phase overload penalties. The X3-EVO 10.0 T exports power equally across all three phases, which satisfies these requirements automatically.

For a house with a 10-12 kWp PV array and a 10-15 kWh battery system, the X3-EVO 10.0 T is sized correctly. It does not make sense to install a 10 kW inverter with a 6-8 kWp array - the inverter would run at low capacity most of the day and the clipping losses would not justify the cost.

Dual MPPT and String Configuration

Two independent maximum power point trackers allow the array to be split across two separate string inputs. This is useful when portions of the roof face different orientations or carry different module counts - a south-facing main roof and a west-facing secondary slope, for example. Each MPPT input accepts up to 13 A and handles voltage in the 200 - 950 V range.

The 1100 V max DC input voltage ceiling is higher than the 1000 V on the Gen 4. This directly affects string sizing: at 1100 V, you can run longer strings of modules with higher Voc ratings without exceeding the inverter's limit, reducing the number of strings needed and lowering installation labour.

EPS Mode - Backup Power Function

EPS (Emergency Power Supply) mode provides backup power when the grid fails. The X3-EVO 10.0 T switches to island mode within 20 milliseconds of grid loss detection, fast enough to keep most sensitive electronics running without interruption. EPS output is limited by the battery's discharge power rather than the inverter's AC output rating - so a 5 kWh battery discharging at 2.5 kW is the practical limit for appliances running on backup.

The EPS output is on a dedicated set of terminals, separate from the grid-tied output. This requires a transfer switch or sub-distribution board in the home's electrical installation to connect backup loads. Standard installation routes all critical circuits (refrigerator, lighting, communication) through the EPS board while leaving high-draw items (electric oven, EV charger) on the main grid supply.

SolaX Cloud Monitoring

SolaX Cloud is included at no cost. The platform logs generation, consumption, battery state of charge, grid import and export, and EPS events. The mobile app (iOS and Android) provides real-time monitoring and push notifications for faults or system warnings.

For installers managing multiple sites, SolaX offers a dedicated installer portal with fleet-level monitoring and remote parameter access. Modbus TCP/RTU is also available for integration with third-party building management or home automation systems including Home Assistant.

Key Advantages

• Dual MPPT - handles mixed-orientation arrays without additional DC combiners
• 1100 V max input - longer string runs, fewer strings, lower cabling cost
• 20 ms EPS switching - fast enough for most sensitive electronics
• IP65 enclosure - suitable for both indoor and outdoor installation
• HV battery compatibility - works with SolaX T-BAT HV, BYD HVS, and other HV systems
• Three-phase output - meets European grid balancing requirements for larger PV systems

What the X3-EVO Does Not Do

The X3-EVO 10.0 T does not support low-voltage (48V) batteries. It does not have an integrated EV charger or smart relay output without an optional expansion module. It does not support parallel connection - if your load exceeds 10 kW, you need a larger inverter, not two X3-EVOs in parallel.

The 5-year standard warranty is shorter than some competitors: Fronius offers 5 years standard with 20 years optional, SMA offers 5 years standard, and Huawei offers 5 years. The optional 10-year extension from SolaX is available through authorised installers.

SolaX X3-EVO 10.0 T vs X3 Hybrid Gen 4

The Gen 4 is the direct predecessor. The key differences are the increased DC input voltage (1100 V vs 1000 V on Gen 4), improved EPS switching speed, and a revised product warranty structure. For new installations, the X3-EVO 10.0 T is the current production model. Gen 4 units are still available through distributor stock and remain fully supported.

Summary

The SolaX X3-EVO 10.0 T is a technically capable 10 kW three-phase hybrid inverter for residential solar installations with three-phase grid connections and HV battery storage. Its dual MPPT, 1100 V input ceiling, and fast EPS switching are genuine improvements over the Gen 4. The HV battery requirement and lack of LV battery support narrow its compatibility, but for a new installation designed around HV storage, those constraints are not relevant. Compatible battery systems - SolaX T-BAT HV, BYD HVS, and others - are widely available from the same installers who supply the inverter.