High-voltage three-phase
Solis S6-EH3P 12 kW hybrid inverter · three-phase · high voltage
Solis S6-EH3P (12 kW) is a three-phase high-voltage hybrid inverter from the S6 series for private homes and small businesses. It works with batteries rated 150–800 V, features 2–3 MPPT trackers, delivers instant switchover to backup (UPS <10 ms) and supports parallel operation of up to 6 units.
Models
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Overview
The Solis S6-EH3P 12 kW (HV) hybrid inverter is a premium three-phase solution built on High Voltage technology for sites that demand maximum efficiency, fast charging and flawless operation of three-phase equipment. Rated at 12 kW with 2 independent MPPT trackers, the model is designed for spacious private houses, cottages, commercial properties, hotels, vehicle service centres and businesses on a three-phase grid.
The key difference between this model and low-voltage alternatives is its high-voltage battery bus interface (150–600 V). Operating at high voltage delivers the same power at far lower currents. This fundamentally reduces thermal losses in the cabling and in the inverter itself, substantially raises overall system efficiency, and allows much thinner power cables to be used during installation. High-voltage batteries also charge and discharge faster, which is critical during short windows of grid availability.
The inverter guarantees absolute protection against blackouts. Transfer to backup power takes less than 10 milliseconds, so servers, PCs and sensitive automation never reboot. Thanks to its three-phase architecture and generous overload headroom, the unit effortlessly starts «heavy» three-phase equipment with high inrush currents — heat pumps, air-conditioning systems, borehole pumps and machine tools.
Solis S6-EH3P 12K-H-EU is engineered for maximum solar yield. Support for input currents up to 21 A per tracker ensures full compatibility with modern high-output PV modules. The inverter integrates flexibly with generators to create long-duration off-grid reserve, supports intelligent load distribution and allows up to 6 units in parallel for further system scaling.
Key specifications
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Power range (kW)
12
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Grid phases
Three-phase (380 V)
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Number of MPPT trackers
3–4 MPPT
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Battery voltage
High voltage — HV (200 V+)
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Built-in monitoring
Wi-Fi, LAN
Key features
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Supports up to 4 MPPT, suited to multi-orientation arrays and shaded sites for higher energy yield Key advantages
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Supports PV input power of up to 160% of the inverter's rated power, maximising solar energy harvest
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Supports PV input current of up to 21 A, compatible with the latest high-power PV modules
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160% overload for 60 seconds in off-grid mode, ensuring reliable start-up of motors, water pumps and air conditioners
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Seamless switching between off-grid and grid-tied modes in under 10 ms for uninterrupted power supply
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Supports unbalanced three-phase output, with each phase delivering up to 50% of the inverter's rated output power
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Supports existing grid-tied solar installations for export control and off-grid use
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Supports generator connection on the grid side, adapting to sites with an insufficient power supply
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Supports up to 6 units in parallel, expanding system capacity
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Configurable battery reserve level for uninterrupted power supply
Technical specifications
Models
SKU: S6-EH3P12K-H-EU(21A) 12K
DC input (PV side)
- Recommended max. PV array size
- 24 kW
- Max. usable PV module input power
- 19.2 kW
- Maximum input voltage
- 1000 V
- Rated voltage
- 600 V
- Start-up voltage
- 160 V
- MPPT voltage range
- 200 - 850 V
- Max. input current
- 4 × 21 A
- Max. current at the DC input
- 21 A
- Max. short-circuit current
- 4 × 31.5 A
- Number of MPPTs / max. inputs per MPPT
- 4 / 4
Battery
- Battery type
- Lithium-ion
- Battery voltage range
- 120 - 700 V
- Maximum charge / discharge current
- 50 A
- Number of battery ports / BMS ports
- 1 / 1
- Communication
- CAN / RS485
AC output (grid side)
- Rated output power
- 12 kW
- Max. apparent output power
- 12 kVA
- Rated grid voltage
- 3/N/PE, 220 V / 380 V, 230 V / 400 V
- Rated grid frequency
- 50 Hz / 60 Hz
- Rated grid output current
- 18.2 A / 17.3 A
- Power factor
- > 0.99 (-0.8 to +0.8)
- THDi
- < 3%
AC input (grid side)
- Max. input power
- 12 kW
- Input voltage range
- 304 - 437 V / 320 - 460 V
- Max. input current
- 27.3 A / 26.0 A
AC output (backup output)
- Rated output power
- 12 kW
- Max. apparent output power
- 1.6× rated power, 60 s
- Backup switchover time
- < 10 ms
- Rated output voltage
- 3/N/PE, 220 V / 380 V, 230 V / 400 V
- Rated frequency
- 50 Hz / 60 Hz
- Rated output current
- 18.2 A / 17.3 A
- Max. AC pass-through current
- 18.2 A / 17.3 A
- THDv (at linear load)
- < 3%
Efficiency
- Maximum efficiency
- 97.85%
- European efficiency
- 97.51%
- Battery charged from PV / AC — maximum efficiency
- 98.31% / 97.50%
- Battery discharge efficiency
- 97.50%
Protection
- Surge protection
- DC type II / AC type II (optional)
- Overcurrent protection
- Yes
- Insulation resistance monitoring
- Yes
- Residual current detection
- Yes
- Built-in PV switch
- Yes
- DC reverse polarity protection
- Yes
- Ingress protection / overvoltage category
- I / II (PV and BAT), III (MAINS and BACKUP)
- Built-in AFCI 2.0 module
- Optional
- Anti-islanding protection
- Yes
General data
- Maximum power per phase
- 50% of rated power
- Dimensions (W × H × D)
- 600 × 500 × 230 mm
- Approximate weight
- 34.5 kg
- Inverter topology
- Transformerless
- Self-consumption
- < 25 W
- Operating temperature range
- -25 ~ +60°C
- Relative humidity
- 0 - 100%
- Ingress protection (IP)
- IP66
- Noise level (typical)
- < 46.9 dB(A)
- Cooling method
- Natural cooling
- Max. operating altitude
- 4000 m
- Grid connection standard
- UNE 206006/UNE 206007-1, CEI 0-21, C10/11, NRS 097-2-1, TOR, EIFS 2018.2, IEC 62116, IEC 61727,
- Safety / EMC standard
- IEC/EN 62109-1/-2, IEC/EN 61000-6-1/-3
Features
- PV connection
- MC4 connector
- Supports two battery inputs and two battery connection modes: independent or parallel
- Quick-connect connector
- AC connection
- Quick-connect connector
- Display
- LED indicator and Bluetooth + app
- Communication interface
- Standard: Wi-Fi+LAN+Bluetooth, CAN-BMS, CAN-Parallel×2, RS485-Meter, RS485, DRM, DI, DO
Documentation and certificates
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DownloadDatasheet
Гібридний інвертор Solis S6-EH3P 12 кВт · трифазний · високовольтний.pdf
Frequently asked questions
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Start from the site's average daily consumption and the peak load the inverter has to carry in off-grid mode. The power range of each modification and the recommended PV array size for it are listed in the product card under "Key specifications" — for a precise selection, contact a Solis dealer or use the form below.
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The list of validated batteries is published on the product page — in the compatible-equipment section, where one has already been compiled for that model. The voltage range (LV or HV, depending on the series) is stated in the technical specifications either way. If there is no list, or the battery you need is not on it, contact the Solis Ukraine technical department — compatibility should be confirmed separately.
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Most Solis hybrid and off-grid inverters support connecting a generator with automatic start-up when the battery is discharged. Whether a specific model has this function, and how it is wired, is stated under "Key features" and in the "Technical specifications" table of the product card.
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It depends on the series: single-phase models are designed for a 220 V grid, three-phase models for 380/400 V. The exact connection type for a given product is stated in the "Grid phases" card under "Key specifications".
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Solis equipment carries the manufacturer's warranty, which in Ukraine is administered by official dealers and authorised service centres. The exact term and conditions are stated on the warranty card and on the device's rating plate — for registration and the claim procedure, see the Support section.
Didn't find your answer?
The Solis Ukraine technical department advises on equipment compatibility, wiring diagrams and system configuration.