Solis S6-EH3P15K-H 15.0kW 3-Phase HV On-grid / Off-grid Hybrid Inverter
- 15kW three-phase hybrid inverter combining solar PV, high-voltage battery, grid and generator in one system for large homes, farms and 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-EH3P15K-H is a 15.0kW three-phase high voltage hybrid inverter designed for properties that need 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 well suited to large homes, agricultural sites, workshops, commercial buildings and public-sector facilities with three-phase supplies.
Key features
- 15kW three-phase hybrid inverter with 15kVA 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 15kW charge / discharge power and 50A battery current.
- Four MPPTs, 30kW recommended PV array size and 20A per input for modern high-power PV modules.
- Generator-compatible with backup switch time under 10ms and strong surge capability for motor and pump 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-EH3P15K-H (S6-EH3P(12–20)K-H series).
- Type: Three-phase high voltage hybrid inverter, transformerless topology.
- Typical applications: Large residential, farms, workshops, commercial and public-sector buildings with three-phase supplies.
AC output – grid side
- Rated AC output power: 15kW.
- Max. apparent output power: 15kVA.
- Rated grid voltage: 3/N/PE, 220/380V or 230/400V.
- Rated grid frequency: 50Hz / 60Hz.
- Rated grid output current: 22.8A at 380V, 21.7A at 400V.
- Max. output current: 22.8A / 21.7A.
- 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: 15kW.
- 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: 22.8A at 380V, 21.7A at 400V.
- Backup switch time: under 10ms.
- Max. allowable phase imbalance: 100% (grid and backup).
- Max. power per phase: 50% of rated power for 15kW model.
AC input – grid and generator
- Grid input voltage range: 304–437V / 320–460V (3/N/PE).
- Max. grid input current: 34.2A / 32.5A.
- Rated grid frequency: 50Hz / 60Hz.
- Frequency range: 45–55Hz / 55–65Hz.
- Generator max. input power: 15kW.
- Generator max. input current: 22.8A / 21.7A.
- Generator rated input frequency: 50Hz / 60Hz.
PV input (DC side)
- Recommended max. PV array size: 30kW.
- Max. usable PV input power: 24kW.
- 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: 15kW.
- 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.