Solis S6 20 kW Three Phase Hybrid High Voltage Inverter
Solis S6 20 kW Three Phase Hybrid High Voltage Inverter
Solis S6 20 kW Three Phase Hybrid High Voltage Inverter
Solis S6-EH3P(12-20)K-H — Dual backup ports, generator input and a 20 A string current for the largest domestic and small commercial roofs.
A hybrid inverter does three jobs a string inverter cannot. It converts solar DC to AC; it charges and discharges a battery on the DC side, which avoids the double conversion an AC-coupled battery pays for; and when the grid fails it islands the site and keeps a backup circuit alive from the battery.
About the Solis S6-EH3P(12-20)K-H
The 12 to 20 kW S6 is where the range stops being a house inverter and starts being a building inverter. Four MPP trackers at 20 A each take up to 40 kW of array on the 20K, and the battery window widens to 120 – 800 V so a taller stack can be used without paralleling.
Two features on this range are worth the money on a real site. The dual backup ports let critical and non-critical loads be separated, so a long outage keeps the freezer and the boiler running after the inverter has shed everything else. And the generator input detects the AC voltage on both the grid and the generator, which stops the inverter back-feeding a generator that is not running — the failure mode that destroys generators.
It is fan cooled at under 65 dB, IP66, and 35.2 kg, with a 7-inch LCD and Bluetooth for setup.
Which battery does this inverter take?
This inverter takes High voltage, roughly 120 – 800 V depending on model.
This model has a battery voltage window of 120 – 800 V, a maximum charge or discharge current of 50 A, BMS communication over CAN / RS485.
Battery option to select when commissioning: PYLON_HV for Pylontech; otherwise "Lithium Battery HV".
Models the manufacturer names as compatible: Pylontech Force-H1-V2, Force-H2-V2, Force-H3, PowerCube-M1C/M2/M3A-100/M3A-180/M5/M7, PowerCube-XH series and Pylontech M1; plus Pytes HV48100, Raystech, Renon Xtreme and others.
What we stock that fits this inverter:
String design, battery limits and what is in the box
The details that decide whether this unit suits the job:
- Battery is high voltage lithium, 120 – 800 V, 50 A maximum charge or discharge, CAN or RS485.
- Four MPP trackers, one string each, 20 A per string and 30 A Isc. 1,000 V maximum, 160 V start-up, 200 – 850 V MPPT window.
- Usable PV input is 160 % of rated: 19.2 kW on the 12K, 32 kW on the 20K, against a recommended array of 24 kW to 40 kW.
- Backup is 2 × rated for 10 s on the 12K and 15K, 1.6 × on the 20K. Switch time is under 10 ms.
- Maximum power per phase is 50 % of rated on the 12K and 15K, 40 % on the 20K, with 100 % allowable imbalance.
- Dual backup ports allow critical and non-critical load groups.
- SG Ready heat pump compatibility and peak shaving in both self-use and generator modes.
- 563 × 546 × 250 mm, 35.2 kg, IP66, fan cooled under 65 dB. Maximum altitude 2,000 m, lower than the rest of the range.
Where this hybrid earns its place
The S6-EH3P(12-20)K-H is specified most often for these jobs.
Things worth knowing about this listing
- Three current sensors are included, for direct connection to the inverter.
Solis 20K technical data
Ordered with this inverter more often than anything else
A hybrid is the middle of a system, not the whole of it. These are the parts our customers add most often:
Questions we get asked about this inverter
What does the second backup port do?
It lets you split the backup circuits into critical and non-critical groups. In a long outage the inverter can drop the non-critical group and keep the freezer, boiler and lighting running for considerably longer on the same battery.
Which battery?
A high-voltage lithium stack inside 120 – 800 V. Solis publish a compatibility list and fitting a battery that is not on it voids the inverter warranty, so check the exact model before ordering.
How much PV can I actually connect?
Up to 160 % of the rated DC power — 19.2 kW usable on the 12K and 32 kW on the 20K — provided each string stays inside 20 A and the array sits in the 200 – 850 V window.
Is it quiet enough for indoors?
It is fan cooled and quoted at under 65 dB, so it belongs in a plant room or garage rather than next to a bedroom.
Documents, advice and trade pricing
Every datasheet, certificate, installation manual and warranty document we hold for this product is in the Documents tab below. See the rest of our hybrid inverter range, our batteries and our solar panels, or email sales@clearraysolar.com if you would like us to check a battery pairing or a string design before you order.
Build your complete solar system
Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.
