Solis S6-GR1P5K-S — 5 kW Single-Phase On-Grid Inverter, 2 MPPT, 97.7% Efficiency

The Solis S6-GR1P5K-S is a 5 kW single-phase grid-tied inverter, and it is one of the units our engineers specify when designing rooftop systems for single-phase villas and houses around Phuket. Rather than reprinting the datasheet, this page explains what the numbers actually mean once the system is on your roof — why two MPPT trackers matter when your roof faces two directions, and why the 7.5 kW panel allowance is deliberately larger than the inverter rating. If you are still working out how big a system your property needs, start with our calculator and read what drives solar cost in Phuket before locking in equipment.

What exactly is the Solis S6-GR1P5K-S, and how does it differ from its siblings?

The model code breaks down logically: S6 is the sixth-generation Solis platform, GR1P means grid-tied single-phase, 5K is the 5 kW AC rating, and -S identifies the hardware version. Quote the whole code when ordering, because other suffixes in the same family carry different specifications. This is a pure on-grid inverter — it converts panel DC into AC for your property and exports the surplus, but it cannot take a battery and it shuts down when the grid goes down, which is standard anti-islanding behaviour. If keeping the lights on during an outage matters to you, look instead at a hybrid with battery backup such as the S6-EH3P20K-H. Compared with the three-phase 50 kW S6-GC3P50K04-NV built for commercial roofs, this unit is sized squarely for a domestic single-phase supply. One point worth knowing for Thailand: the manufacturer's datasheet lists the MEA and PEA grid codes among the standards it supports, which gives your paperwork a clean reference — though listing in a datasheet is not the same as equipment registration with the utility, so ask the importer to confirm that separately. You can see the rest of the components we pair it with on our equipment page.

Highlights from the datasheet

• Two MPPT trackers for split roofs: Two independent trackers accepting two strings in total means one string per tracker, so a shaded or east-facing array will not drag down the output of the other roof plane.
• 16 A per tracker handles modern high-current panels: Today's N-type modules push more current every generation; 16 A per input with 22 A short-circuit tolerance leaves headroom rather than capping your panel choice.
• Up to 7.5 kW of panels on a 5 kW inverter: The manufacturer's recommended maximum PV power is deliberately above the AC rating. Oversizing captures far more energy in early morning, late afternoon and overcast conditions, at the cost of clipping the very top of a bright midday peak.
• Wide 90–550 V MPPT window: The low 90 V threshold lets the inverter start producing in weak light, and gives flexibility on short roof planes where only a few modules fit in series — total string voltage simply must never exceed 550 V.
• 97.7% peak and 97.1% EU efficiency: The EU figure is weighted across realistic load conditions through the day, which makes it the more honest number for comparing inverters than a single-point peak.
• IP66 enclosure rated -25 to +60°C: That protection level allows outdoor mounting, though we still position units out of direct sun and driving rain — a cooler inverter simply lasts longer.
• 8.9 kg, 330 × 371 × 161 mm: Light and compact enough for a straightforward wall mount with no special bracketry, and easy to reach for future service checks.

Key specifications (S6-GR1P5K-S)

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

• Salt air and humidity: Coastal Phuket combines heavy monsoon rain with airborne salt, so an IP66 enclosure is the minimum we accept here — and we still choose a mounting position sheltered from the prevailing sea breeze.
• Light that changes by the minute: Tropical cloud bursts and sudden clear spells are hard on trackers. The wide 90–550 V MPPT window keeps the inverter tracking through those swings instead of dropping in and out.
• Multi-plane island roofs: Hillside villas here rarely have one clean roof face. Two MPPTs let us group panels by orientation so one array's shading does not penalise the whole system.
• Phuket is PEA territory: Grid-connected systems on the island are approved by the Provincial Electricity Authority, not MEA. We prepare and file the PEA permits and drawings for you.

Who it suits

• Single-phase houses and townhouses: Standard residential meters at 220 V single phase match this inverter directly, with no supply upgrade required.
• Households with real daytime consumption: Families at home during the day, home offices, or properties running air conditioning and refrigeration get the most value, because generation is consumed on the spot.
• Owners with a two-plane roof: Two different orientations or pitches map neatly onto the two MPPT inputs.
• Buyers starting with grid-tied only: A sensible first step for cutting daytime bills now, with battery storage considered later on a separate system.
• Not the right fit for: Properties needing outage backup or running a three-phase supply — those should look at the hybrid S6-EH3P20K-H or a three-phase unit instead.

Summary

The Solis S6-GR1P5K-S is a well-matched inverter for a single-phase Phuket home: 5 kW output, two MPPT trackers for split roof planes, up to 7.5 kW of panels, 97.7% peak efficiency and an IP66 body built for coastal weather. Pearl Solar Energy's engineers and installers design complete systems around this unit and handle the utility paperwork — see our services for the full scope. Send us a recent electricity bill via contact and we will tell you honestly whether 5 kW is the right size for your property.

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