Solis S6-EH3P20K-H 20 kW Three-Phase HV Hybrid Inverter
€2,449.00
Solis S6-EH3P20K-H is a 20 kW three-phase hybrid inverter with 4 MPPT, up to 32 kW of PV power and 120–800 V HV batteries.
- Free delivery across Lithuania
- 14-day returns — we pay for the return shipping
- Manufacturer warranty, CE compliant
The Solis S6-EH3P20K-H is a 20 kW 3-phase high-voltage (HV) hybrid inverter with the same dimensions (563 × 546 × 250 mm) and weight (35.2 kg) as the 15 kW S6-EH3P15K-H, but a higher power rating. It accepts up to 32 kW of PV power (recommended PV array up to 40 kW), its battery charge, discharge and backup output power is 20 kW, and its maximum efficiency is 97.7 %. Choose it if you plan more than 24 kW of PV power or up to 20 kW of backup loads; the S6-EH3P15K-H is the one for a smaller site.
Technical specifications
| Parameter | Value |
|---|---|
| Model | S6-EH3P20K-H |
| Type | Three-phase hybrid (energy storage) inverter for high-voltage (HV) batteries |
| Rated power (grid) | 20 kW / 20 kVA |
| Phases and grid voltage | 3/N/PE, 220/380 V or 230/400 V; 50/60 Hz |
| Rated grid current | 30.4 A / 28.9 A |
| Power factor | > 0.99 (0.8 leading to 0.8 lagging) |
| THDi | < 3 % |
| Max. usable PV input power | 32 kW (160 % of rated power) |
| Recommended max. PV array size | 40 kW |
| Max. PV input voltage | 1000 V |
| Rated PV voltage | 600 V |
| Start-up voltage | 160 V |
| MPPT voltage range | 200–850 V (300–850 V at full load) |
| MPPT inputs / max. strings | 4 / 4 |
| Max. input current | 4 × 20 A (up to 20 A per input) |
| Max. short-circuit current | 4 × 30 A |
| Battery type | Lithium-ion (Li-ion) |
| Battery voltage range | 120–800 V |
| Max. charge/discharge current | 50 A |
| Max. charge/discharge power | 20 kW |
| Battery connections | 1 battery port, 1 BMS port; CAN / RS485 communication |
| Max. AC input power (from grid) | 30 kW (45.6 A / 43.3 A) |
| Backup output | 20 kW; three-phase 3/N/PE 220/380 V, 230/400 V |
| Backup output overload | Up to 160 % of rated power for 10 s |
| Switchover time to backup | < 10 ms (single inverter); < 20 ms in a parallel system of up to 6 inverters |
| THDv (linear load) | < 3 % |
| Generator input | Max. 20 kW; three-phase generator only, power not above the inverter’s rated power |
| Max. efficiency | 97.7 % |
| EU efficiency | 97.5 % |
| Max. efficiency, battery charging from PV | 98.5 % |
| Max. efficiency, battery charging/discharging via AC | 97.2 % |
| MPPT efficiency | 99.9 % |
| Unbalanced load per phase (grid and backup) | Up to 40 % of rated power per phase |
| Protection | Anti-islanding, insulation resistance monitoring, residual current monitoring, overcurrent protection, integrated DC switch, reverse DC polarity protection; DC/AC Type II surge protection optional |
| AFCI 2.0 (arc-fault detection) | Optional |
| Ingress protection | IP66 |
| Dimensions (W × H × D) | 563 × 546 × 250 mm |
| Weight | 35.2 kg |
| Noise (typical) | < 65 dB(A) |
| Operating temperature | −25 … +60 °C |
| Max. operating altitude | 2000 m |
| Topology | Transformerless |
| Night-time self-consumption | < 25 W |
| Cooling | Smart (redundant) fan cooling |
| Connectors | PV – MC4; battery – spring (lever) terminal; AC – OT terminals |
| Display and control | 7.0 in. LCD, Bluetooth + app; monitoring via SolisCloud |
| Communication | Standard WiFi + LAN + Bluetooth; CAN-BMS, CAN-parallel × 2, RS485 (meter), DRM, DI, DO × 3 |
| Parallel operation | Up to 6 identical inverters; battery ports are not connected in parallel; cable between inverters ≤ 5 m |
| Operating modes | Self-use, feed-in priority, off-grid; peak shaving |
| Grid connection standards | EN 50549-1/-10, VDE4105, CEI 0-21, CEI 0-16, NC-RFG Type B, NRS 097-2-1, G99 |
| Safety / EMC standards | IEC/EN 62109-1/-2, IEC/EN 61000-6-1/-2/-3/-4 |
Download the manufacturer datasheet (PDF)
How the Solis S6-EH3P20K-H differs from the S6-EH3P15K-H
| Parameter | Solis S6-EH3P15K-H | Solis S6-EH3P20K-H |
|---|---|---|
| Nominal power | 15 kW | 20 kW |
| Battery charge / discharge, backup output and generator input power | 15 kW | 20 kW |
| Max. usable PV input power | 24 kW | 32 kW |
| Recommended max. PV array size | 30 kW | 40 kW |
| Nominal grid current | 22.8 A / 21.7 A | 30.4 A / 28.9 A |
| Unbalanced load per phase | up to 50 % of nominal power | up to 40 % of nominal power |
Choose the S6-EH3P20K-H if you plan more than 24 kW of PV power (up to 32 kW) or backup loads of up to 20 kW. If up to 24 kW of PV power and up to 15 kW of backup loads are enough, the Solis S6-EH3P15K-H fits. Both inverters have the same 4 MPPT inputs, 120–800 V batteries, 50 A charge and discharge current, 97.7 % maximum efficiency, IP66 protection and a weight of 35.2 kg, and the two models cannot be connected in parallel with each other.
What is a 20 kW three-phase hybrid inverter with battery used for?
The Solis S6-EH3P20K-H suits large homes and small commercial PV systems with energy storage where 20 kW of grid and backup power is needed. Four MPPT inputs suit roofs facing different directions or with a complex module layout.
- Homes that want to use their own solar energy: the inverter runs in self-use, feed-in priority and off-grid modes, and supports peak shaving.
- Sites that need backup power: when the grid fails, the system switches to off-grid and supplies the backup loads.
- Systems on time-of-use tariffs: battery charging and discharging can be scheduled by TOU tariff.
- Homes with a heat pump: the inverter controls the pump if it carries the SG Ready label.
- Systems that will grow: up to 6 identical inverters can be connected in parallel.
How many solar panels can I connect to a 20 kW hybrid inverter?
Up to 32 kW of PV power (160 % of rated power) can be used with the S6-EH3P20K-H, and the manufacturer recommends a PV array of no more than 40 kW. The inverter has 4 MPPTs and up to 4 strings, with up to 20 A allowed per input. The MPPT voltage range is 200–850 V (300–850 V at full load), the maximum PV input voltage is 1000 V and the start-up voltage is 160 V.
Which batteries can I connect to a high-voltage hybrid inverter?
The S6-EH3P20K-H connects to high-voltage (HV) lithium-ion batteries in the 120–800 V range. It has one battery port and one BMS port, communicates with the battery over CAN or RS485, and handles up to 50 A and 20 kW of charge and discharge. Each battery is connected to the inverter by its own CAN line and controlled by it, and battery ports are not connected in parallel. The manufacturer publishes the list of compatible batteries, so Hybrid Energy checks every set against it before offering it.
Will my house keep running in a power cut: backup power and generator
Yes, when the grid fails the S6-EH3P20K-H switches to backup power in under 10 ms and supplies backup loads of up to 20 kW.
- The backup output is three-phase (3/N/PE, 230/400 V), with overload allowed up to 160 % of rated power for 10 s.
- Unbalanced load on a single phase can reach 40 % of rated power.
- Only a three-phase generator can be connected, with power not above the inverter’s rated power (up to 20 kW). With a low battery level and no grid, the system can start the generator to supply the loads and charge the battery.
- A generator must not run together with a grid-tied inverter, as this risks damaging the generator. In a parallel system the generator is recommended to be connected through an ATS.
How do I connect a hybrid inverter to the grid and the battery?
The S6-EH3P20K-H connects to a three-phase 3/N/PE grid and complies with grid connection standards including EN 50549-1/-10 and VDE4105. The nominal grid current is 30.4 A / 28.9 A and the maximum AC input power from the grid is 30 kW. The system needs CTs or a smart meter; monitoring is available through SolisCloud and the Bluetooth app.
A hybrid inverter can not only export surplus energy to the grid but also keep it for yourself. ESO (Lithuanian grid operator) states:
“Part of the surplus electricity generated can be stored in an energy storage device and used in the evening.”
We handle it for you. We select the equipment for your site, deliver anywhere in Lithuania, install and connect it. The consultation before purchase is free.
Frequently asked questions
What is the power of the Solis S6-EH3P20K-H?
The Solis S6-EH3P20K-H is a 20 kW (20 kVA) three-phase hybrid inverter, and its backup output is also 20 kW.
How much PV power can I connect to the S6-EH3P20K-H 20 kW hybrid inverter?
Up to 32 kW of PV power (160 % of rated power) can be used with the S6-EH3P20K-H, and the recommended maximum PV array size is 40 kW.
How does the Solis S6-EH3P20K-H differ from the S6-EH3P15K-H?
The S6-EH3P20K-H is a 20 kW inverter that accepts up to 32 kW of PV power, while the S6-EH3P15K-H is a 15 kW inverter that accepts up to 24 kW. The dimensions (563 × 546 × 250 mm), weight and 4 MPPT inputs are the same.
Which batteries work with the S6-EH3P20K-H?
The S6-EH3P20K-H works with high-voltage lithium-ion batteries in the 120–800 V range. Hybrid Energy checks compatibility against the manufacturer’s list before offering a set.
How fast does the S6-EH3P20K-H switch to backup power?
The S6-EH3P20K-H switches to backup power in under 10 ms, or under 20 ms in a parallel system of up to 6 inverters.
Can I connect a generator to the S6-EH3P20K-H?
Yes, but only a three-phase generator whose power does not exceed the inverter’s rated power, that is up to 20 kW.
How many S6-EH3P20K-H inverters can run in parallel?
Up to 6 identical inverters can be connected in parallel; different models cannot be mixed. Battery ports are not connected in parallel. This means the S6-EH3P20K-H cannot be paralleled with the S6-EH3P15K-H.
Can the S6-EH3P20K-H control a heat pump?
Yes, the S6-EH3P20K-H controls a heat pump if the pump carries the SG Ready label.
What is the IP rating and operating temperature of the S6-EH3P20K-H?
The S6-EH3P20K-H is rated IP66 and operates from −25 °C to +60 °C.
Does Hybrid Energy deliver and install the S6-EH3P20K-H in Lithuania?
Yes, Hybrid Energy selects the system for your site, delivers anywhere in Lithuania, installs and connects the S6-EH3P20K-H. The consultation before purchase is free.
Sources
| Dimensions | 56.3 × 54.6 × 25 cm |
|---|---|
| Power | 20 kW |
| Phases | Three-phase |
| Brand | Solis |
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