Hoymiles HIT-20L-G3 20 kW Hybrid Inverter, 3-Phase, 48 V

The Hoymiles HIT-20L-G3 20 kW 3-phase hybrid inverter (MPN: HIT-20L-G3) is the most powerful model in the three-phase HIT-(5–20)L-G3 series and combines a PV inverter, low-voltage battery connection, and backup power supply in a single unit. With a rated AC output power of 20,000 W, four independent MPPT trackers, a recommended maximum PV power of 40,000 W, and a battery connection for Li-ion and lead-acid batteries ranging from 40 to 60 V, this model is suitable for high-power three-phase PV and energy storage systems. Various energy management modes, S-Miles cloud monitoring, and an EPS output with a switching time of less than 10 ms round out the range of features.

20 kW Hybrid Inverter for High-Power PV and Storage Systems

• 20,000 W three-phase rated output power in grid and EPS operation
• Recommended maximum PV power of 40,000 W
• 4 independent MPPT trackers with four string inputs
• Up to 20 A PV input current per MPPT
• MPPT voltage range from 150 to 900 V
• For Li-ion and lead-acid batteries with 40–60 V
• Up to 350 A charge and discharge current
• Less than 10 ms switching time for the EPS output
• Up to 40,000 VA for 10 seconds in EPS mode
• 100% unbalanced output; maximum power per phase up to 50% of rated power
• Self-consumption, cost-efficiency, backup, peak-shaving, and time-of-use modes
• Remote monitoring via the S-Miles Cloud
• Maximum efficiency of 98.5%
• Intelligent fan cooling
• IP66 enclosure
• Up to 10 inverters in parallel for grid-connected and off-grid system expansions

Four MPPT trackers and up to 40 kW of PV power

On the PV side, the HIT-20L-G3 features four independent MPPT trackers, each with a single string input. An MPPT continuously adjusts the operating point of the connected solar modules to ensure that the available solar power is fully utilized. Four separate trackers are particularly useful, for example, in larger PV systems with varying roof orientations or differing irradiance conditions. The maximum input current per tracker is 20 A, and the maximum short-circuit current is 30 A. The usable MPPT voltage range extends from 150 to 900 V. The maximum input voltage is specified as 1,000 V, and the turn-on voltage as 150 V. For the HIT-20L-G3, Hoymiles recommends a maximum PV power of 40,000 W. This allows the PV generator to be sized larger than the rated AC power of 20,000 W. The specific string sizing must always remain within the permissible voltage and current limits.

Operating Modes for Self-Consumption and Targeted Storage Control

The intelligent energy management system of the HIT-G3 series supports various strategies for utilizing solar energy and battery storage. These include self-consumption mode, economy mode, backup mode, peak shaving mode, and time-of-use mode. In self-consumption mode, the generated PV energy is first used to power the connected loads. Any surplus can then be used to charge the battery storage system. Peak shaving limits grid draw during power peaks. Time-of-use mode, on the other hand, allows for time-dependent control of charging and discharging processes.

40,000 VA UPS for short-term load peaks

For backup power, the HIT-20L-G3 provides a separate three-phase EPS output. The rated output power here is also 20,000 W, and the maximum continuous output current is 30.4 A. For loads with short-term higher power requirements, the inverter can provide up to 40,000 VA for 10 seconds, provided there is sufficient PV and battery power. The switchover time is less than 10 ms. As a result, loads connected to the EPS output can continue to be powered with a very short switchover time, provided the overall system is properly configured. Which loads can actually be protected depends, among other factors, on load power, inrush currents, battery capacity, and the design of the entire storage system.

Unbalanced Operation in a Three-Phase Grid

The HIT-20L-G3 supports a 100% unbalanced output and can therefore accommodate phases with different loads within the three-phase system. The output power of a single phase can reach up to 50% of the rated power. This is particularly helpful in buildings where electrical loads are not evenly distributed across the three phases.

S-Miles Cloud for Monitoring and System Supervision

The S-Miles Cloud allows you to remotely track operating data from the PV and storage system. The platform is designed to monitor system performance over extended periods and analyze solar power generation and battery usage. Additionally, the inverter features digital inputs and outputs as well as DRM. CAN is used for battery communication.

Wall Mounting and Intelligent Fan Cooling

The HIT-20L-G3 measures 539 × 696 × 232 mm and weighs 41 kg. The unit is designed for wall mounting. Heat dissipation is achieved via an intelligent fan cooling system. The noise level is below 60 dB. The permissible operating temperature range is from -25 to +65 °C, although power output is reduced above 45 °C. With an IP66 rating, the enclosure is protected against dust and powerful water jets.

Integrated Protection Functions

The HIT-20L-G3 features several integrated protection mechanisms for PV and grid operation. These include protection against islanding, PV reverse polarity protection, insulation resistance monitoring, ground fault current monitoring, and AC overcurrent and short-circuit protection. Additionally, AC overvoltage and undervoltage protection, as well as Type II overvoltage protection on both the DC and AC sides, are provided.

Technical Specifications

• Recommended max. PV power: 40,000 W
• Maximum input voltage: 1,000 V
• Rated voltage: 720 V
• Start-up voltage: 150 V
• MPPT voltage range: 150–900 V
• Number of MPPT channels: 4
• Max. number of input strings: 4
• Max. input current: 20/20/20/20 A
• Max. short-circuit current: 30/30/30/30 A

• Rated output power: 20,000 W
• Max. apparent output power: 22,000 VA
• Max. AC continuous bypass current: 50 A
• Power system configuration: 3L/N/PE
• AC rated output voltage/range: 380/400 V / 266–480 V
• Rated mains frequency: 50/60 Hz
• Max. output current: 33.3 A
• Power factor: >0.99 (0.8 leading to 0.8 lagging)

• Rated output power: 20,000 W
• Max. apparent output power: 40,000 VA for 10 s
• Switching time: <10 ms
• Mains configuration: 3L/N/PE
• Max. continuous output current: 30.4 A

• Battery type: Li-ion/lead-acid battery
• Battery voltage range: 40–60 V
• Max. charge/discharge current: 350/350 A
• Charging strategy for Li-ion batteries: Automatic adaptation to BMS
• Charging curve: 3 stages/equalization
• Communication: CAN

• Islanding protection: integrated
• Reverse polarity protection at the PV string input: integrated
• Insulation resistance monitoring: integrated
• Residual current monitoring: integrated
• AC overcurrent protection: integrated
• AC short-circuit protection: integrated
• AC overvoltage and undervoltage protection: integrated
• Surge protection: DC Type II / AC Type II

• Installation: Wall-mounted
• Dimensions (W × H × D): 539 × 696 × 232 mm
• Weight: 41 kg
• Protection rating: IP66
• MPPT efficiency: 99.9%
• Max. efficiency: 98.5%
• EU efficiency: 98.0%
• Operating temperature: -25 to +65 °C, power derating >45 °C
• Relative humidity: 0–95%, non-condensing
• Cooling: Intelligent fan
• Noise level: <60 dB
• Maximum operating altitude: ≤4,000 m, power reduction >2,000 m
• Solar/Battery Topology: Transformerless/High-Frequency Isolation
• User interface: LED, app

Package Contents

Hoymiles HIT-20L-G3 20 kW 3-phase hybrid inverter with 4 MPPT channels