The Solis S6-EH1P3.6K-L-PLUS is a 3.6kW single-phase low voltage hybrid inverter from the S6 Plus range, designed for smaller residential solar-plus-storage systems where a compact entry point into battery storage is needed. With a recommended max. PV array size of 7.2kW, a 40-60V battery voltage range, and a UPS-grade switchover time of under 4ms, it brings the same backup and generator-ready feature set as the larger PLUS models to smaller households.
80A
Max. Charge/Discharge 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.
Preliminary datasheet status: The manufacturer's published datasheet for this model family is marked "Preliminary", indicating some figures may be subject to change ahead of a finalised release. Confirm current specifications directly with Solis before quoting on projects with strict compliance timelines.
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.
Compact Entry Point to Battery Storage
Rated at 3.6kW output with a 7.2kW recommended PV array, this model brings the full S6 Plus feature set to smaller roofs and lower-consumption households without oversizing the inverter for the property.
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.
Six Customisable Charge/Discharge Settings
A 6-stage customisable charge/discharge schedule lets the battery be timed around time-of-use tariffs or specific household routines, giving finer control over when the battery charges and discharges than a fixed default schedule.
200% Overload Handling
The inverter can sustain 200% of rated power for 10 seconds in backup mode, providing the surge headroom needed to start motor-driven loads such as pumps, compressors and air conditioning units from battery power.
Generator Connectivity with Automatic Control
Supports multiple generator input methods with automatic On/Off control, allowing a backup generator to recharge the battery and support loads during extended outages without manual intervention.
Input DC (PV Side)
| Recommended max. PV array size |
7.2 kW |
| Max. usable PV input power |
5.76 kW |
| Max. input voltage |
500 V |
| Rated voltage |
330 V |
| Start-up voltage |
90 V |
| MPPT voltage range |
90-435 V |
| Max. input current |
16 A / 16 A |
| Max. short circuit current |
20 A / 20 A |
| MPPT number / max. input strings number |
2 / 2 |
Battery
| Battery type |
Li-ion / Lead-acid |
| Battery voltage range |
40-60 V |
| Max. charge / discharge power |
3.6 kW |
| Max. charge / discharge current |
80 A |
| Communication |
CAN / RS485 |
Output AC (Grid Side)
| Rated output power |
3.6 kW |
| Max. apparent output power |
3.6 kVA |
| Operation phase |
1/N/PE |
| Rated grid voltage |
220 V / 230 V |
| Rated grid frequency |
50 Hz / 60 Hz |
| Rated / max. output current |
16.4 A / 15.7 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 |
25 A |
| Frequency range |
45-55 Hz / 55-65 Hz |
Output AC (Backup)
| Rated output power |
3.6 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 |
16.4 A / 15.7 A |
| Max. AC passthrough current |
35 A |
| THDv (@linear load) |
<2% |
Efficiency
| Max. efficiency |
97.5% |
| EU efficiency |
96.5% |
| Battery charged by PV/AC max. efficiency |
95.3% / 93.9% |
| Battery discharged to AC max. efficiency |
93.8% |
Protection
| Ground fault monitoring |
Yes |
| DC reverse-polarity protection |
Yes |
| Integrated AFCI (DC arc-fault protection) |
Yes (activation required) |
| 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 |
21.6 kg |
| Topology |
High frequency isolation (for battery) |
| Operating ambient temperature range |
-40°C to +60°C |
| Ingress protection |
IP66 |
| Cooling concept |
Natural convection |
| Max. operation altitude |
4000 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 |
| Grid connection standard |
NRS 097-2-1, IEC 62116, IEC 61727, IEC 60068, IEC 61683, EN 50530, MEA, PEA |
Frequently Asked Questions
What size PV array can I connect to the S6-EH1P3.6K-L-PLUS?
The inverter supports a recommended maximum PV array size of 7.2kW across its two MPPT inputs, making it well matched to smaller roofs and lower-consumption households.
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 this inverter be used with a backup generator?
Yes. It supports multiple generator input methods with automatic On/Off control, allowing a generator to recharge the battery and support loads directly during extended outages.
Is this inverter suitable for UK grid-tied installations?
Yes. Confirm current DNO notification requirements (G98 or G99) based on total system export capacity before commissioning, and ensure installation is carried out by an MCS-accredited installer.
What surge load can the inverter handle in backup mode?
The inverter can deliver 200% of its rated power for 10 seconds in backup mode, providing enough surge capacity to start motor-driven loads such as pumps, compressors and air conditioning units from the battery.
