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Solis S6-EH1P5K-L-PLUS – 5 kW Hybrid Solar Inverter for Professional Residential PV Systems
Solis S6-EH1P6K-L-PLUS 5 kW Hybrid Solar Inverter
The Solis S6-EH1P5K-L-PLUS is a 5 kW single-phase low-voltage hybrid solar inverter developed for professional residential solar PV, solar battery and backup power installations. It combines dual-MPPT PV input, 40–60 V battery integration, full-rated backup output and generator support within one compact energy storage platform.
For European solar installers, EPC contractors, resellers and solar wholesalers, the model provides a practical specification for new residential systems, solar battery retrofits and complete solar energy storage kits. It is particularly relevant where a project requires high PV oversizing, low-voltage battery architecture and reliable backup operation without moving to a high-voltage battery system.
PV input capacity for professional system design
The Solis S6-EH1P5K-L-PLUS supports a recommended maximum solar PV array size of 10 kW and up to 8 kW of usable PV input power. This allows installers to oversize the solar panel array relative to the inverter’s 5 kW AC output, helping increase production during mornings, evenings and periods of lower irradiance.
The inverter provides two independent MPPT trackers with one PV string input per MPPT. Its operating range includes:
- 500 V maximum PV input voltage
- 330 V rated DC voltage
- 90 V start-up voltage
- 90–435 V MPPT operating range
- 16 A maximum input current per MPPT
- 20 A maximum short-circuit current per MPPT
The two independent MPPT channels allow separate solar panel strings to be designed for different roof orientations, pitches or shading conditions. Module current, open-circuit voltage and short-circuit current must remain within the inverter limits under the site’s minimum design temperature.
Low-voltage solar battery compatibility
The inverter is designed for 40–60 V low-voltage solar batteries and supports compatible lithium-ion and lead-acid battery systems.
For the 5kW model, maximum battery charging and discharging power is 5 kW, with a maximum charge and discharge current of 112 A. CAN and RS485 communication interfaces are provided for communication with compatible battery management systems.
This specification makes the Solis S6-EH1P5K-L-PLUS suitable for installers building residential solar battery systems based on 48 V-class storage architecture. The selected battery model, BMS protocol, firmware and usable capacity should be checked against the current Solis battery compatibility documentation before procurement and commissioning.
Full 5kW single-phase output
On the grid side, the Solis S6-EH1P5K-L-PLUS provides 5kW rated output power and 5kVA maximum apparent output power.
The inverter operates on a single-phase L/N/PE connection at 220 V or 230 V and supports 50 Hz or 60 Hz grid frequency. Rated output current is specified at 27.3 A at 220 V or 26.1 A at 230 V.
A power factor greater than 0.99 and total harmonic current distortion below 3% support stable operation within professionally designed residential solar PV systems. Local distribution-network requirements must still be checked before specifying a 5 kW single-phase inverter for a particular installation.
Sub-10 ms backup power switching
The dedicated backup output is rated at the full 5 kW inverter output, allowing installers to design a substantial protected-load circuit for use during a grid failure.
Backup switching takes less than 10 milliseconds, helping maintain power to compatible critical loads with minimal interruption. The inverter can also provide up to twice its rated apparent power for 10 seconds, supporting short starting-current peaks from equipment such as:
- Water pumps
- Refrigeration equipment
- Air-conditioning systems
- Small motors and compressors
- Other compatible inductive loads
Maximum AC passthrough current for the 5kW model is 32 A. Backup circuits, protective devices, cable sizing and connected loads must be designed according to the inverter installation manual and applicable electrical regulations.
Generator input and off-grid operation
The Solis S6-EH1P5K-L-PLUS includes a generator input supporting up to 5 kW input power. Rated generator input current is 27.3 A at 220 V or 26.1 A at 230 V.
Generator integration provides an additional energy source for properties with unstable grids, extended outages or higher backup-energy requirements. The inverter also supports multiple generator connection and automatic-control methods, allowing the system to be adapted to different local installation conditions.
Additional system capabilities include:
- PV-only off-grid operation
- Existing grid-connected PV integration
- Export control
- Smart load management
- Customisable battery backup reserve
- Parallel operation of up to six inverter units
These functions give professional solar installers more flexibility when designing complete solar battery and backup systems for weak-grid, rural and energy-independent applications.
AI-powered energy management and VPP readiness
The Solarator Series supports AI-powered energy management and is described by Solis as VPP-ready. This enables the inverter platform to support advanced energy optimisation, smart-load control and compatible virtual power plant applications.
Smart load management can prioritise essential circuits and help extend available backup time during an outage. The battery backup level can also be adjusted according to the required balance between daily self-consumption and emergency reserve capacity.
Actual VPP, tariff-management and third-party platform functions depend on the installed communication hardware, firmware, regional service availability and the selected energy management platform.
Fast installation and commissioning
A 7-inch industrial-grade LCD display provides a larger local interface for configuration, system status and operating information.
Standard communication options include:
- Wi-Fi
- LAN
- Bluetooth
- CAN-BMS
- Two CAN parallel interfaces
- RS485 meter communication
- RS485
- DRM
- Digital input
- Two digital outputs
Optional 2G, 3G or 4G communication is also listed in the official datasheet. This range of interfaces supports professional commissioning, battery communication, meter integration, parallel operation and remote system monitoring.
Efficiency and integrated protection
The Solis S6-EH1P5K-L-PLUS reaches a maximum inverter efficiency of 96.2% and a European efficiency of 96.1%.
Specified battery conversion efficiencies include:
- Up to 95.3% when charging the battery from PV
- Up to 93.9% when charging the battery from AC
- 93.8% battery discharge efficiency
Integrated protection functions include output overcurrent protection, insulation-resistance monitoring, residual-current detection, an integrated PV switch, DC reverse-polarity protection and anti-islanding protection. Integrated AFCI 2.0 arc-fault protection is listed as an optional feature.
IP66 enclosure and natural cooling
The Solis S6-EH1P5K-L-PLUS has an IP66-rated enclosure and is designed for operation between −25°C and +60°C.
The 5kW model uses natural cooling and has a typical noise level below 40 dB(A). With no active cooling fan required for this model, it is suitable for residential installations where low operating noise is an important design consideration.
The inverter measures 335 × 560 × 253 mm, weighs approximately 23 kg and supports installation at altitudes up to 3,000 metres. Installation clearances, mounting conditions and environmental requirements must follow the current Solis installation manual.
Suitable applications
The Solis S6-EH1P5K-L-PLUS is suitable for:
- New residential solar PV and solar battery systems
- Low-voltage battery retrofit projects
- Whole-home or selected-load backup installations
- Solar PV systems with oversized panel arrays
- Properties with unstable grid connections
- Generator-supported energy storage systems
- PV-only off-grid applications
- AC-coupled solar battery upgrades
- Parallel inverter installations
- Complete solar energy storage kits for professional installers
Why specify the Solis S6-EH1P5K-L-PLUS?
The main procurement value of the Solis S6-EH1P5K-L-PLUS is the combination of a 5kW single-phase output, 12 kW recommended PV array capacity, 40–60 V solar battery support and full-rated backup operation.
Its dual-MPPT design, 5kW battery charge and discharge capacity, sub-10 ms backup switching and generator integration cover the main requirements of modern residential energy storage projects. Natural cooling, low noise and an IP66 enclosure also make the model practical for residential installation environments.
For solar installers, EPC contractors and solar distributors sourcing a flexible low-voltage hybrid inverter, the Solis S6-EH1P5K-L-PLUS can be supplied as a standalone component or specified within a complete solar battery kit with compatible storage, protection, monitoring and installation equipment.
Product Datasheet and Downloads
Installation and Operation Manual Solis S6-EH1P(3-10)K-L-PLUS EN
User Manual Solis S6-EH1P(3-10)K-L-PLUS EN
Quick Installation Guide Solis S6-EH1P(3-10)K-L-PLUS EN
Application Note – Solis Datalogger Compatibility Guide EN
Solis Vorbereitung Ihres Solarsystems auf den Winter DE
Installationshandbuch Solis S6-EH1P(3-10)K-L-PLUS DE
Benutzerhandbuch Solis S6-EH1P(3-10)K-L-PLUS DE
Battery Compatibility and System Documentation Solis Hybrid Inverters
FAQ: S6-EH1P5K-L-PLUS 5kW Hybrid Solar Inverter
The Solis S6-EH1P5K-L-PLUS supports compatible 40–60 V low-voltage lithium-ion and lead-acid solar batteries. CAN and RS485 communication are provided for battery management system integration, while the 5kW model supports up to 5kW charging and discharging power and a maximum battery current of 112 A. Installers should confirm the selected battery against the current Solis compatibility documentation before procurement.
The Solis S6-EH1P5K-L-PLUS supports a recommended maximum PV array size of 10 kW and up to 8 kW of usable PV input power. It provides two independent MPPT trackers, two PV string inputs, a 90–435 V MPPT range and a maximum input current of 16 A per MPPT.
Yes. The inverter provides a 5kW rated backup output with a switching time of less than 10 milliseconds. It can deliver up to twice its rated apparent power for 10 seconds to support short starting-current peaks and provides up to 32 A AC passthrough current for professionally designed backup circuits.
Yes. The inverter supports PV-only off-grid operation and includes a generator input rated at up to 5kW. It can also integrate an existing grid-connected PV system and supports parallel operation of up to six inverter units, giving installers flexibility for backup, weak-grid and expandable energy storage projects.
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