The Solis S6-EH1P6K-L-PLUS is a 6kW single-phase low voltage hybrid inverter from the S6 Plus series, purpose-built for residential solar-plus-storage systems that demand high PV input capacity and fast backup switching. With dual 32A MPPT inputs supporting up to 12kWp of PV array, a 40-60V battery voltage range, and a UPS-grade switchover time of under 4ms, it is designed to keep critical loads running through grid outages while maximising self-consumption from high-power modern panels.
2 x 32A
MPPT Input Current
Installer note — G98/G99 & MCS compliance: UK grid connection requires G98 or G99 notification depending on system size, and installation must be completed by an MCS-accredited installer. Battery type and BMS communication protocol must be correctly configured before commissioning to ensure safe charge/discharge operation.
Backup port loading: The dual backup ports are rated for the inverter's continuous output only — correct operation of the backup function depends on loads being distributed correctly across critical and non-critical circuits at the point of installation. Confirm wiring configuration with your installer before commissioning.
Battery compatibility: Compatible with a wide range of 40-60V lithium and lead-acid battery brands, including common low-voltage stacks such as Pylontech, Dyness and BYD. Always confirm compatibility against the current Solis approved battery list before specifying a system.
High-Current Dual MPPT
Two independent MPPT trackers each rated at 32A let the inverter accept the latest generation of high-output PV modules without derating, supporting arrays up to 160% of rated AC output for stronger yields in low-light conditions and shaded roofs.
UPS-Grade Backup Switching
A switchover time of under 4ms is fast enough that sensitive electronics such as computers, routers and NAS drives typically ride through a grid outage without a noticeable interruption, functioning like a built-in uninterruptible power supply.
Dual Backup Port Load Management
Two separate backup outputs allow critical and non-critical circuits to be wired independently, so during an outage the system can prioritise essential loads while shedding non-essential ones to conserve battery capacity.
Intelligent 6-Stage Battery Management
A 6-stage timed charge/discharge profile paired with integrated battery care logic manages charge current and depth of discharge automatically, reducing degradation and extending usable battery lifespan over repeated cycles.
200% Overload Handling
The inverter can sustain 200% of rated power for 10 seconds in off-grid mode, providing the surge headroom needed to start motor-driven loads such as pumps, compressors and air conditioning units from battery power.
Scalable Parallel Operation
Multiple units can be paralleled to form single-phase or three-phase microgrids up to 48kW combined output, allowing the same platform to scale from a single home to a larger residential or small commercial installation.
Input DC (PV Side)
| Recommended max. PV array size |
12 kW |
| Max. usable PV input power |
9.6 kW |
| Max. input voltage |
500 V |
| Rated voltage |
330 V |
| Start-up voltage |
90 V |
| MPPT voltage range |
90-435 V |
| Max. input current |
32 A / 32 A |
| Max. short circuit current |
40 A / 40 A |
| MPPT number / max. input strings |
2 / 4 |
Battery
| Battery type |
Li-ion / Lead-acid |
| Battery voltage range |
40-60 V |
| Max. charge / discharge power |
6 kW |
| Max. charge / discharge current |
135 A |
| Communication |
CAN / RS485 |
Output AC (Grid Side)
| Rated output power |
6 kW |
| Max. apparent output power |
6 kVA |
| Operation phase |
1/N/PE |
| Rated grid voltage |
220 V / 230 V |
| Rated grid frequency |
50 Hz / 60 Hz |
| Rated / max. output current |
27.3 A / 26.1 A |
| Power factor |
>0.99 (0.8 leading – 0.8 lagging) |
| THDi |
<2% |
Input AC (Grid Side)
| Input voltage range |
187-253 V |
| Max. input current |
40 A |
| Frequency range |
45-55 Hz / 55-65 Hz |
Output AC (Backup)
| Rated output power |
6 kW |
| Max. apparent output power |
2x rated power, 10 s |
| Back-up switch time |
<4 ms |
| Rated output voltage |
1/N/PE, 220 V / 230 V |
| Rated frequency |
50 Hz / 60 Hz |
| Rated output current |
27.3 A / 26.1 A |
| Max. AC passthrough current |
40 A |
| THDv (@linear load) |
<2% |
Efficiency
| Max. efficiency |
96.2% |
| EU efficiency |
94.7% |
| Battery charged by PV/AC max. efficiency |
95.3% / 94.5% |
| Battery discharged to AC max. efficiency |
94.9% |
Protection
| Ground fault monitoring |
Yes |
| DC reverse-polarity protection |
Yes |
| Integrated AFCI 2.0 |
Optional |
| Protection class / overvoltage category |
I / II (PV and BAT), III (Mains, Backup and Gen) |
General Data
| Dimensions (W x H x D) |
335 x 560 x 227 mm |
| Weight |
22.2 kg |
| Topology |
High frequency isolation (for battery) |
| Operating ambient temperature range |
-40°C to +60°C |
| Ingress protection |
IP66 |
| Cooling concept |
Intelligent redundant fan-cooling |
| Max. operation altitude |
3000 m |
Connections & Compliance
| DC connection |
MC4 plug (PV port) / Terminal block (BAT port) |
| AC connection |
Terminal block |
| Display |
LCD + Bluetooth + App |
| Communication |
RS485, CAN; optional Wi-Fi, GPRS, LAN |
| Safety / EMC standard |
IEC/EN 62109-1/-2, EN 61000-6-2/-3 |
| UK grid connection |
G98 / G99 compliant, MCS certified |
Frequently Asked Questions
What size PV array can I connect to the S6-EH1P6K-L-PLUS?
The inverter supports a recommended maximum PV array size of 12kW across its two MPPT inputs, each capable of handling up to 32A, allowing use with high-power modern solar panels without derating.
Which batteries are compatible with this inverter?
The inverter operates within a 40-60V battery voltage range and supports a wide range of lithium and lead-acid battery brands, including common low-voltage stacks such as Pylontech, Dyness and BYD. Compatibility should always be confirmed against the current Solis approved battery list before specifying a system.
How fast does the backup supply switch over during a power cut?
The manufacturer's datasheet specifies a switchover time of under 4ms, which is fast enough that most sensitive electronics continue running through the transition without a noticeable interruption.
Can multiple inverters be combined for a larger system?
Yes. Multiple S6-EH1P6K-L-PLUS units can be operated in parallel to form a single-phase or three-phase microgrid with a combined output of up to 48kW, suiting larger homes or small commercial premises.
Is this inverter suitable for UK grid-tied installations?
Yes. The inverter is G98 and G99 compliant and MCS certified, supporting both grid export and zero-export self-consumption configurations. Installation must be carried out by an MCS-accredited installer with the correct notification submitted depending on system size.
What surge load can the inverter handle in off-grid mode?
The inverter can deliver 200% of its rated power for 10 seconds in off-grid mode, providing enough surge capacity to start motor-driven loads such as pumps, compressors and air conditioning units from the battery.
