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Solis S6-EH3P20K-H — 20 kW Three-Phase Hybrid Inverter, Full-Power Backup Under 10 ms

By Pearl Solar Energy · Updated 2026-09-03 · ~5 min read

⚡ Quick answer

What is the S6-EH3P20K-H?

  • Grid-side output: 20 kW / 20 kVA into a three-phase 3/N/PE supply at 220 V/380 V or 230 V/400 V, 50/60 Hz
  • PV side: 4 MPPT, 4 strings, 4 × 20 A input, MPPT range 200–850 V, 1000 V maximum input, up to 40 kW of panels recommended with 32 kW maximum usable PV input
  • Battery: High-voltage lithium-ion, 120–800 V range, 50 A maximum charge and discharge current
  • Backup: Full 20 kW backup output, peak up to 1.6 times rated power for 10 seconds, switchover under 10 ms (under 20 ms with up to six units in parallel)
  • Build and warranty: IP66, -25 to +60°C, 563 × 546 × 250 mm, 35.2 kg, five-year standard warranty

The Solis S6-EH3P20K-H is a 20 kW three-phase hybrid inverter, and it is the unit our engineers reach for when a large home or hybrid with battery backup project in Phuket needs both lower daytime bills and power that stays on through an outage. The specification that really defines this machine is not the 20 kW rating but the fact that it delivers the full 20 kW in backup mode and switches over in under 10 milliseconds — fast enough that nothing in the house notices the grid has gone. If you are weighing whether storage earns its place in your budget, run the numbers first with our calculator.

What is the Solis S6-EH3P20K-H hybrid inverter, and how is it different from a plain on-grid unit?

The code reads as S6 for the sixth-generation platform, EH3P for energy hybrid three-phase, 20K for the 20 kW rating, and -H for the hardware version. Unlike pure grid-tied units such as the S6-GC3P50K04-NV or S6-GR1P5K-S, this one has a battery port and a dedicated backup circuit built in, so it does three jobs at once: supply the property from the panels, store surplus for evening use, and disconnect from the grid to keep feeding the house during an outage. On the battery side it uses a high-voltage architecture across a 120 to 800 V range rather than the familiar 48 V low-voltage systems, which means the battery pack must come from the manufacturer's supported compatibility list and communicate correctly with the inverter — always request that list from the importer before ordering. Suffixes matter here too: the family includes a -ND-H sibling with electrically identical specifications, differing only in display type and slightly in enclosure depth, and there is a separate low-voltage battery variant that is not the same system at all. The figures on this page are for the -H code. The rest of what goes into a complete installation is listed under equipment.

Highlights from the datasheet

  • Full 20 kW backup, not a token emergency circuit: Many hybrids can only back up a fraction of their rating. This one specifies backup power equal to the rated output, with peaks to 1.6 times rated power for 10 seconds — precisely the window in which air conditioning compressors and pool pumps draw their inrush current on startup.
  • Switchover in under 10 ms: Faster than household equipment takes to reboot, so refrigeration, routers, CCTV and computers ride through without interruption. With up to six units in parallel the transfer still stays under 20 ms.
  • Up to 40 kW of panels on a 20 kW inverter: The manufacturer recommends a maximum PV array of 40 kW with 32 kW maximum usable input. That headroom lets the battery reach full charge early in the day while the array still covers daytime load at the same time.
  • Four MPPT trackers, 200–850 V, 4 × 20 A: Four trackers on a 20 kW machine is generous, which suits hillside villas whose roofs are split across several levels and orientations.
  • High-voltage lithium battery, 120–800 V, 50 A charge and discharge: A high-voltage pack moves the same power at lower current than a 48 V system, so cable losses are smaller. Actual charge power in kilowatts depends on the voltage of the specific pack you select.
  • 97.7% peak and 97.5% EU efficiency: The two figures sit unusually close together, which indicates the unit holds its efficiency across the load range rather than only at full output.
  • Parallel up to six units, five-year standard warranty: Future expansion does not require replacing what you already installed, and the warranty can be extended to ten, fifteen or twenty years if arranged within twelve months of installation.

Key specifications (S6-EH3P20K-H)

Specification Datasheet value
Rated output power (Grid side)20 kW
Max. apparent output power20 kVA
MPPT number / Max. input strings number4 / 4
MPPT voltage range200–850 V
Max. input voltage1000 V
Recommended max. PV array size / Max. usable PV input powerแนะนำติดตั้ง 40 kW / ใช้งานได้สูงสุด 32 kW
Max. input current4 × 20 A
Battery type / Battery voltage rangeLi-ion แรงดันสูง 120–800 V
Max. charge / discharge current50 A
Output AC (Back-up) rated power20 kW (พีคสูงสุด 1.6 เท่าของกำลังที่กำหนด นาน 10 วินาที)
Back-up switch timeน้อยกว่า 10 ms (ระบบขนานสูงสุด 6 ตัว น้อยกว่า 20 ms)
Max. efficiency / EU efficiency97.7% / 97.5%
Rated grid voltage3 เฟส 3/N/PE, 220 V/380 V, 230 V/400 V, 50/60 Hz
Ingress protection / Operating temperature rangeIP66 / -25 ถึง +60°C
Dimensions (W × H × D) and Weight563 × 546 × 250 mm / 35.2 kg
Standard warranty5 ปี (ซื้อขยายเป็น 10 / 15 / 20 ปีได้ ภายใน 12 เดือนหลังติดตั้ง)

Note: every figure above comes straight from the Ginlong Technologies Co., Ltd. (จดทะเบียนในตลาดหลักทรัพย์เซินเจิ้น รหัส 300763) datasheet. Actual system design (strings per MPPT, cable sizing, breakers) must be calculated for each site.

Why this model suits Phuket

  • Monsoon outages: Heavy rain and wind take out supply across parts of the island during monsoon season. Full 20 kW backup with sub-10 ms transfer means a villa with guests in residence never sits in the dark at 2am.
  • Villa evening load is genuinely high: Multiple bedroom air conditioners, pool circulation and garden lighting all run after sunset, so energy stored during the day is actually consumed rather than sitting idle in an oversized battery.
  • Hillside roofs split across levels: Phuket's elevated properties rarely offer one continuous roof plane. Four MPPT trackers let each section run at its own optimum without penalising the others.
  • PEA territory and coastal conditions: A hybrid that remains grid-connected still requires a permit from the Provincial Electricity Authority, which we handle — see PEA permits. The IP66 enclosure rated -25 to +60°C suits the island's coastal climate.

Who it suits

  • Pool villa and large-home owners on three phase: Properties with several air conditioners, pool plant and a clear evening load profile benefit on both counts — lower bills and real backup.
  • Rental villas and boutique accommodation: Businesses where an outage directly damages the guest experience; a sub-10 ms transfer means guests never register the event.
  • Small businesses with equipment that cannot stop: Restaurants with refrigeration, clinics, or offices running servers and security systems.
  • Owners planning to expand later: Up to six units can be paralleled, so you can start with one and scale as demand grows.
  • Not the right fit for: Single-phase properties, or owners focused purely on cutting daytime bills with no need for backup — a grid-tied inverter delivers better value in that case.

Summary

The Solis S6-EH3P20K-H answers the specific brief we hear most often from Phuket villa owners: cut the daytime bill and keep the property running when the grid fails. It delivers the full 20 kW in backup with switchover under 10 ms, accepts up to 40 kW of panels across four MPPT trackers, and works with high-voltage lithium batteries in the 120 to 800 V range. Two things to confirm before ordering are the supported battery list and the exact model suffix. Pearl Solar Energy's engineers and specialist installers design, install and permit systems around this inverter — see our services or contact us to size the battery around how your household actually uses power.

See other models from this brand on the Solis overview, or browse all the equipment we install.

Download the datasheet (PDF) — full manufacturer specification sheet

Frequently asked questions

What are the full specifications of the Solis S6-EH3P20K-H?

It is a three-phase hybrid inverter with 20 kW rated grid-side output and 20 kVA maximum apparent power, connecting to a 3/N/PE supply at 220 V/380 V or 230 V/400 V, 50/60 Hz. The PV side offers four MPPT trackers taking four strings, an MPPT range of 200 to 850 V, 1000 V maximum input voltage and 4 × 20 A maximum input current, with a recommended array of up to 40 kW and 32 kW maximum usable PV input. The battery side accepts high-voltage lithium-ion from 120 to 800 V at up to 50 A charge and discharge. Backup output is 20 kW, efficiency is 97.7% peak and 97.5% EU, and the IP66 unit measures 563 × 546 × 250 mm at 35.2 kg.

How much can the S6-EH3P20K-H actually run during a power cut?

The manufacturer specifies backup power at 20 kW, equal to the inverter's rated output, rather than backing up only a limited emergency circuit as some hybrids do. It also handles peaks up to 1.6 times rated power for 10 seconds, which matters more than most owners realise because air conditioning compressors, water pumps and pool pumps all draw heavy inrush current in the first seconds of starting. Transfer into backup mode takes under 10 milliseconds, and under 20 milliseconds when up to six units are paralleled. How long backup lasts, however, is set by the capacity of the battery you choose and the load running at the time — not by the inverter itself.

What batteries work with the S6-EH3P20K-H, and how much PV can it take?

The battery side is high-voltage lithium-ion with a supported range of 120 to 800 V and a maximum charge and discharge current of 50 A. This is not the familiar 48 V low-voltage architecture, so the pack must come from the manufacturer's supported list and must communicate correctly with the inverter — ask your importer for the compatibility list before committing to a battery brand. On the PV side, the manufacturer recommends an array of up to 40 kW on this 20 kW unit, with maximum usable PV input stated as 32 kW, split across four MPPT trackers and four strings. Each input is limited to 20 A, and total string voltage must stay under 1000 V.

What warranty applies to the S6-EH3P20K-H?

The manufacturer's documentation states a five-year standard warranty with extensions available to ten, fifteen or twenty years, provided the extension is arranged within twelve months of installation. After that window it cannot be purchased. On a hybrid system you need to think about this in two parts, because the battery carries its own separate warranty terms, often measured in charge cycles or cumulative energy throughput rather than years alone. These terms come from the manufacturer's global warranty document and may differ from what a Thai importer offers, so request the Thailand-applicable warranty documents for both the inverter and the battery before you decide.

How does the -H version differ from the -ND-H and from the on-grid models?

Against the grid-tied models in the same family, the S6-GC3P50K04-NV and S6-GR1P5K-S, the difference is fundamental: this hybrid has a battery port and an integrated backup circuit, while on-grid units simply stop producing when the grid fails. The -ND-H sibling is electrically identical on every specification line, differing only in the type of display fitted to the unit and slightly in enclosure depth; every figure on this page refers to the -H code. There is also a separate low-voltage battery variant that is a different system entirely. Quote the complete model code on the purchase order and check it against the nameplate before accepting delivery.

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