Low-voltage three-phase

Solis S6-EH3P hybrid inverter (5–18) kW · three-phase · low voltage

Solis S6-EH3P (5–18 kW) is a three-phase low-voltage hybrid inverter from the S6 series for private homes and small businesses. It works with widely available 48 V (LiFePO₄) batteries, supports a charge/discharge current of up to 280 A, delivers instant switchover to backup mode (UPS <10 ms) and supports parallel operation of up to 6 units.

Models

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Solis S6-EH3P hybrid inverter (5–18) kW · three-phase · low voltage · 5K

Overview

The Solis S6-EH3P hybrid inverter (5–18 kW) is a high-performance three-phase solution for sites with a three-phase supply that require balanced load distribution, high power output and complete energy independence. Covering 5 to 18 kW and equipped with 2 independent MPPT trackers, it is ideal for large private houses, cottages, commercial premises, hotels, vehicle service centres and production facilities.

The key advantage of the S6-EH3P series is a full three-phase configuration with off-grid operating capability. The unit switches instantly to battery backup power in under 10 milliseconds, protecting sensitive three-phase and single-phase equipment, servers and automation from sudden blackouts. Its generous overload headroom lets the inverter handle heavy inrush currents with ease, comfortably starting three-phase motors, heat pumps, industrial air conditioners and compressors.

The inverter is designed to harvest the maximum amount of solar energy. It supports PV arrays with a generous oversizing margin and is fully compatible with modern high-density, high-performance PV modules (input current up to 21 A per tracker). The result is efficient generation and rapid battery recharging even in cloudy weather or during the autumn and winter months.

Solis S6-EH3P offers maximum flexibility when designing a power system. The low-voltage range accepts a wide selection of readily available batteries (40–60 V, including LiFePO4) without being tied to a single brand. The inverter supports intelligent generator control for long-duration reserve, flexible load priority settings and parallel connection of up to 6 units to increase the site's total capacity.

Technical specifications

Models

SKU: S6-EH3P5K02-NV-YD-L

DC input (PV side)

Recommended max. PV array size: 10 kW
Recommended max. PV array size: 12 kW
Recommended max. PV array size: 16 kW
Recommended max. PV array size: 20 kW
Recommended max. PV array size: 24 kW
Recommended max. PV array size: 30 kW
Recommended max. PV array size: 36 kW
Max. usable PV module input power: 9 kW
Max. usable PV module input power: 9.6 kW
Max. usable PV module input power: 12.8 kW
Max. usable PV module input power: 16 kW
Max. usable PV module input power: 19.2 kW
Max. usable PV module input power: 24 kW
Max. usable PV module input power: 28.8 kW
Maximum input voltage: 1000 V
Rated voltage: 550 V
Start-up voltage: 160 V
MPPT voltage range: 200 - 850 V
Max. input current: 20 A / 20 A
Max. input current: 20 A / 20 A
Max. input current: 20 A / 40 A
Max. input current: 20 A / 40 A
Max. input current: 20 A / 40 A
Max. input current: 40 A / 40 A
Max. input current: 42 A / 42 A
Max. current at the DC input: 20 A
Max. current at the DC input: 20 A
Max. current at the DC input: 20 A
Max. current at the DC input: 20 A
Max. current at the DC input: 20 A
Max. current at the DC input: 20 A
Max. current at the DC input: 21 A
Max. short-circuit current: 30 A / 30 A
Max. short-circuit current: 30 A / 30 A
Max. short-circuit current: 30 A / 50 A
Max. short-circuit current: 30 A / 50 A
Max. short-circuit current: 30 A / 50 A
Max. short-circuit current: 50 A / 50 A
Max. short-circuit current: 50 A / 50 A
Number of MPPTs / max. inputs per MPPT: 2 / 2
Number of MPPTs / max. inputs per MPPT: 2 / 2
Number of MPPTs / max. inputs per MPPT: 2 / 3
Number of MPPTs / max. inputs per MPPT: 2 / 3
Number of MPPTs / max. inputs per MPPT: 2 / 3
Number of MPPTs / max. inputs per MPPT: 2 / 4
Number of MPPTs / max. inputs per MPPT: 2 / 4

Battery

Battery type: Lithium-ion / lead-acid
Battery voltage range: 40 - 60 V
Maximum charge / discharge current: 125 A
Maximum charge / discharge current: 150 A
Maximum charge / discharge current: 180 A
Maximum charge / discharge current: 220 A
Maximum charge / discharge current: 250 A
Maximum charge / discharge current: 290 A
Maximum charge / discharge current: 320 A
Number of battery ports / BMS ports: 2 / 1
Maximum charge / discharge current of each port: 150 A
Maximum charge / discharge current of each port: 150 A
Maximum charge / discharge current of each port: 150 A
Maximum charge / discharge current of each port: 150 A
Maximum charge / discharge current of each port: 150 A
Maximum charge / discharge current of each port: 150 A
Maximum charge / discharge current of each port: 175 A
Communication: CAN / RS485

AC output (grid side)

Rated output power: 5 kW
Rated output power: 6 kW
Rated output power: 8 kW
Rated output power: 10 kW
Rated output power: 12 kW
Rated output power: 15 kW
Rated output power: 18 kW
Max. apparent output power: 5 kVA
Max. apparent output power: 6 kVA
Max. apparent output power: 8 kVA
Max. apparent output power: 10 kVA
Max. apparent output power: 12 kVA
Max. apparent output power: 15 kVA
Max. apparent output power: 18 kVA
Rated grid voltage: 3/N/PE, 220 V / 380 V; 3/N/PE, 230 V / 400 V
Rated grid frequency: 50 Hz / 60 Hz
Rated grid output current: 7.6 A / 7.3 A
Rated grid output current: 9.1 A / 8.7 A
Rated grid output current: 12.2 A / 11.5 A
Rated grid output current: 15.2 A / 14.4 A
Rated grid output current: 18.2 A / 17.3 A
Rated grid output current: 22.8 A / 21.7 A
Rated grid output current: 27.3 A / 26.1 A
Power factor: > 0.99 (-0.8 to +0.8)
THDi: < 3%

AC input (grid side)

Max. input power: 7.5 kW
Max. input power: 9 kW
Max. input power: 12 kW
Max. input power: 15 kW
Max. input power: 18 kW
Max. input power: 22.5 kW
Max. input power: 27 kW
Input voltage range: 323 - 437 V / 340 - 460 V
Max. input current: 11.4 A / 10.9 A
Max. input current: 13.7 A / 13.1 A
Max. input current: 18.3 A / 17.3 A
Max. input current: 22.8 A / 21.7 A
Max. input current: 27.3 A / 26.0 A
Max. input current: 34.2 A / 32.5 A
Max. input current: 41 A / 39.2 A

AC output (backup output)

Rated output power: 5 kW
Rated output power: 6 kW
Rated output power: 8 kW
Rated output power: 10 kW
Rated output power: 12 kW
Rated output power: 15 kW
Rated output power: 18 kW
Max. apparent output power: Twice the rated power for 10 seconds
Backup switchover time: < 10 ms
Rated output voltage: 3/N/PE, 220 V / 380 V; 3/N/PE, 230 V / 400 V
Rated frequency: 50 Hz / 60 Hz
Rated output current: 7.6 A / 7.3 A
Rated output current: 9.1 A / 8.7 A
Rated output current: 12.2 A / 11.5 A
Rated output current: 15.2 A / 14.4 A
Rated output current: 18.2 A / 17.3 A
Rated output current: 22.8 A / 21.7 A
Rated output current: 27.3 A / 26.1 A
Max. AC pass-through current: 50 A
THDv (at linear load): < 3%

AC input (generator side)

Max. input power: 5 kW
Max. input power: 6 kW
Max. input power: 8 kW
Max. input power: 10 kW
Max. input power: 12 kW
Max. input power: 15 kW
Max. input power: 18 kW
Rated input current: 7.6 A / 7.3 A
Rated input current: 9.1 A / 8.7 A
Rated input current: 12.2 A / 11.5 A
Rated input current: 15.2 A / 14.4 A
Rated input current: 18.2 A / 17.3 A
Rated input current: 22.8 A / 21.7 A
Rated input current: 27.3 A / 26.1 A
Rated input voltage: 3/N/PE, 220 V / 380 V; 3/N/PE, 230 V / 400 V
Rated input frequency: 50 Hz / 60 Hz

Efficiency

Maximum efficiency: 97.5%
European efficiency: 96.4%
Battery charged from PV / AC — maximum efficiency: 95.0% / 94.4%
Battery discharge efficiency: 94.5%

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, BACKUP and GEN)
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): 430 × 660 × 305 mm
Weight: 42 kg
Inverter topology: Non-isolated (PV), isolated (battery)
Self-consumption: < 30 W
Operating temperature range: -25 ~ +60°C
Relative humidity: 0 - 100%
Ingress protection (IP): IP66
Noise level (typical): < 65 dB(A)
Cooling method: Intelligent fan cooling
Max. operating altitude: 4000 m

Grid connection standard

Safety / EMC standard: IEC/EN 62109-1/-2, IEC/EN 61000-6-1/-2/-3/-4

Features

PV connection: MC4 quick-connect plug
Battery connection: Screw terminal
AC connection: Screw terminal
Display: 7.0" LCD display and Bluetooth + app
Communication interface: Standard: Wi-Fi+LAN+Bluetooth, CAN-BMS, CAN-Parallel×2, RS485-Meter, RS485, DRM, DI, DO×4; optional: 2G/3G/4G

Compatible equipment

Validated Solis storage systems that match this inverter's voltage and communication protocol.

Documentation and certificates

Datasheet

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний.pdf

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Datasheet

S6-EH3P(8-18)K-Flyer-V2.2_20260528140039.pdf

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User manual 1

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_інструкція1.pdf

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User manual 2

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_інструкція2.pdf

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Certificate 1

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_сертифікат1.pdf

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Certificate 2

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_сертифікат2.pdf

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Certificate 3

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Certificate 4

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_сертифікат4.pdf

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Certificate 5

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Certificate 6

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Certificate 7

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Certificate 8

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Certificate 9

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Certificate 10

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_сертифікат10.pdf

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Certificate 11

Гібридний інвертор Solis S6-EH3P (5–18) кВт · трифазний · низьковольтний_сертифікат11.pdf

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Frequently asked questions

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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