Solis S6-EH3P12K-H 12.0kW 3-Phase HV On-grid / Off-grid Hybrid Inverter
- 12kW three-phase hybrid inverter combining solar PV, high-voltage battery, grid and generator in one system for larger homes and small commercial sites.
- Fast backup changeover and generator compatibility to keep essential loads running during grid outages.
- Four MPPTs with 20A per input, wide voltage window and IP66 rating for flexible UK rooftops and demanding environments.
The Solis S6-EH3P12K-H is a 12.0kW three-phase high voltage hybrid inverter designed for properties requiring dependable on-grid and off-grid operation with battery storage. It supports high-power PV arrays, high-voltage Li-ion batteries and generator input, with fast backup switching for critical loads when the grid fails. This makes it suitable for large homes, farms, workshops, small commercial buildings and public-sector sites with three-phase supplies.
Key features
- 12kW three-phase hybrid inverter with 12kVA output for 3/N/PE 380/400V systems, compliant with G99 and other major grid codes.
- High-voltage Li-ion battery support (120–800V) with up to 12kW charge / discharge power and 50A battery current.
- Four MPPTs, 24kW recommended PV array size and 20A per input, ideal for modern high-power PV modules.
- Generator-compatible with under 10ms backup switch time and strong surge capability for motor loads.
- IP66 enclosure, intelligent fan cooling and −25 to +60°C operating range for UK and overseas climates.
Technical specifications
Inverter type and applications
- Model: Solis S6-EH3P12K-H (S6-EH3P(12–20)K-H series).
- Type: Three-phase high voltage hybrid inverter, transformerless topology.
- Typical applications: Large residential, farms, workshops, small commercial and public-sector buildings with three-phase supplies.
AC output – grid side
- Rated AC output power: 12kW.
- Max. apparent output power: 12kVA.
- Rated grid voltage: 3/N/PE, 220/380V or 230/400V.
- Rated grid frequency: 50Hz / 60Hz.
- Rated grid output current: 18.2A at 380V, 17.3A at 400V.
- Max. output current: 18.2A / 17.3A.
- Power factor: greater than 0.99, adjustable 0.8 leading to 0.8 lagging.
- THDi: less than 3% at linear load.
AC output – backup side
- Rated backup output power: 12kW.
- Max. apparent backup power: 2 × rated power for 10 seconds; 1.6 × rated power for 10 seconds.
- Backup output voltage: 3/N/PE, 220/380V or 230/400V.
- Backup frequency: 50Hz / 60Hz.
- Backup rated output current: 18.2A at 380V, 17.3A at 400V.
- Backup switch time: under 10ms.
- Max. allowable phase imbalance: 100% (grid and backup).
- Max. power per phase: 50% of rated power for 12kW model.
AC input – grid and generator
- Grid input voltage range: 304–437V / 320–460V (3/N/PE).
- Max. grid input current: 27.3A / 26.0A.
- Rated grid frequency: 50Hz / 60Hz.
- Frequency range: 45–55Hz / 55–65Hz.
- Generator max. input power: 12kW.
- Generator max. input current: 18.2A / 17.3A.
- Generator rated input frequency: 50Hz / 60Hz.
PV input (DC side)
- Recommended max. PV array size: 24kW.
- Max. usable PV input power: 19.2kW.
- Max. DC input voltage: 1000V.
- Rated DC voltage: 600V.
- Start-up voltage: 160V.
- MPPT voltage range: 200–850V.
- Number of MPPTs / strings: 4 MPPTs / 4 strings.
- Max. input current: 4 × 20A.
- Max. short-circuit current: 4 × 30A.
- PV connection: MC4 connectors.
- Integrated DC switch: yes.
Battery input
- Battery type: Li-ion high voltage.
- Battery voltage range: 120–800V.
- Max. charge / discharge power: 12kW.
- Max. charge / discharge current: 50A.
- Battery communication: CAN / RS485.
- Battery connection: OT terminals.
Efficiency
- Max. inverter efficiency: 97.7%.
- European efficiency: 97.5%.
- PV to battery max. efficiency: 98.5%.
- Battery to AC max. efficiency: 97.2%.
Protection and compliance
- Anti-islanding, output overcurrent, short-circuit, DC reverse-polarity, PV overvoltage and battery reverse protection.
- Integrated AFCI 2.0 (arc-fault protection) optional.
- Ingress protection rating: IP66.
- Grid standards: EN 50549-1/-10, VDE4105, CEI 0-21, CEI 0-16, NC-RfG Type B, NRS 097-2-1, LTU-1, G99, PEA.
- Safety / EMC standards: IEC/EN 62109-1/-2, IEC/EN 61000-6-1/-2/-3/-4.
User interface and communications
- Display: 7.0 inch LCD with Bluetooth and app support.
- Communications: CAN, RS485, Ethernet, optional Wi-Fi, cellular and LAN dataloggers.
Mechanical and environmental
- Dimensions (W × H × D): 563 × 546 × 250mm.
- Weight: 35.2kg.
- Self-consumption (night): under 25W.
- Operating temperature range: −25 to +60°C.
- Relative humidity: 0–95% (non-condensing).
- Cooling: intelligent fan cooling.
- Typical noise emission: under 65dB(A).
- Max. operating altitude: 2000m.
Shipping and UK expert support
Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, please contact us on +44 2080640335 or info@energian.co.uk for a quote.
This is a fixed, hard-wired three-phase hybrid inverter and is not supplied as a plug-and-play product. Energian recommends installation and commissioning by a suitably qualified electrician or trusted installer partner to meet UK wiring regulations and grid-connection rules.
UK expert support is available – contact us by phone, email or live chat, or visit our office for in-person consultation on system design, battery pairing, generator integration and DNO applications.