Sungrow

Sungrow S1000S-L

1 kW Microinverter Single-phase

Compare with closest alternative Datasheet PDF

Rated AC (kW)

1.00

Typical for its class

Euro eff. (%)

95.4

Typical · median 95.4%

MPPT

Not published

Max DC (V)

Typical · median 60 V

Weight (kg)

3.5

Typical · median 3.5 kg

Warranty (yrs)

Not published

The Sungrow S450S-L/S1000S-L/S2000S-L series are grid-tie microinverters designed for direct connection to the grid - ideal where maximum yield per module is essential. In practice, this means enhanced tolerance to shading and losses resulting from different panel orientations, since energy is converted closer to the source, rather than in a single central inverter. Depending on the model, you get different numbers of MPPTs, translating to more precise string optimization in challenging rooftop scenarios (eaves, chimneys, various roof pitches). High European efficiency has real significance in Poland's climate - the inverter better maintains efficiency even with variable weather and partial loads, leading to a more stable annual energy production. A major advantage is remote monitoring via WLAN and rapid diagnostics down to the individual module level. The series is primarily aimed at residential and small commercial installations; it's also worth noting the EU compliance declarations and its robust, installer-friendly construction for outdoor use.

Ranking

42 microinverters

Metric This inverter Median Position in class Rank in class

European efficiency 95.4% 95.4% Typical 1

MPPT trackers - 2 Not published -

Max DC input voltage 60 V 60 V Typical 4

Weight per kW 3.5 4.0 Typical 15

Warranty - 10 yrs Not published -

Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Specifications

Open datasheet PDF

Rated AC power 1 kW Continuous output

Max apparent power 1.00 kVA

Phases Single-phase

Nominal AC voltage 230 V 154–277 V

Max AC current 4.6 A

Grid frequency 50 Hz Range 45–55 Hz (50 Hz grid) / 55–65 Hz (60 Hz grid)

Power factor >0.99 / 0.95 leading – 0.95 lagging (adjustable)

Harmonic distortion (THD) 5.0 %

Max DC voltage 60 V Caps the string length

MPPT voltage range 16 to 60 V

Start-up voltage 22 V

Max input current per MPPT 16.0 A Must exceed the panel's Imp

Max short-circuit current per MPPT 20.0 A Must exceed the panel's Isc

European efficiency 95.4 % Weighted across part loads

Max efficiency 96.2 % Best single operating point

Dimensions 226 × 265 × 42 mm Height × width × depth

Weight 3.5 kg 3.5 kg per kW

Enclosure IP67

Cooling natural

Operating temperature -40 to 65 °C

Max humidity 100 %

Max altitude 2000 m

Interfaces Wi-FiDisplay

Protocols WLAN (Wi‑Fi)

Protection Surge protection

Certifications IEC/EN 62109-1/-2IEC 62116IEC 61683EN 50530IEC 61000-3-2:2006IEC/EN 61000-3-12IEC 60529

Pros and cons

5 positive · 2 caution

What owners get

#2 Inverter Manufacturer Globally - Business Continuity Assurance

Sungrow shipped 148 GW of inverters in 2024, ranking second worldwide (Wood Mackenzie H1 2025). Tier-1 bankable status and 27 years in the market (since 1997) provide credible warranty backing and service availability - critical considerations over a 20-year microinverter service life.

Up to 4 Independent MPPTs per Unit

The S2000S-L model features 4 independent MPPT trackers (S450S-L: 2 MPPTs), enabling panel-level power optimization that eliminates mismatch losses even in heavily shaded or multi-pitch roof installations - with no additional optimizers required.

IP67 Ingress Protection + C5 Corrosion Class

IP67 protection guarantees resistance to full water immersion, while C5 corrosion certification (the highest level per ISO 12944) makes the series well-suited for harsh environments - coastal and industrial sites - with no risk of enclosure degradation.

Wide MPPT Range 16-60 V, Full-Power Operation up to 60°C

A start-up voltage of just 16 V enables earlier morning ramp-up under low-irradiance conditions. The innovative microchannel heat sink (fanless design) allows full rated-power operation at rooftop temperatures up to 60°C - a meaningful advantage on hot summer days.

Module-Level WLAN Monitoring + OTA Firmware Updates

The built-in extended-band WLAN module enables one-touch commissioning and per-panel diagnostics without an additional gateway. Over-the-air (OTA) firmware updates eliminate truck-roll costs when grid code or regulatory changes require software updates.

Trade-offs

European Efficiency 95.4% - Below Category Leaders

The rated European efficiency is 95.4% (peak 96.2%). By comparison, the Enphase IQ8M achieves a CEC efficiency of ~97.6%. The ~2 percentage-point gap translates to approximately 200 kWh of lost annual generation on a 10 kWp system at 1,000 kWh/kWp/year.

New Series with No Multi-Year Field Track Record

The S-L line debuted at Intersolar Europe in June 2024. The absence of multi-year operational data from installations in the Polish climate - freeze-thaw cycles, sustained humidity - makes long-term reliability difficult to assess, in contrast to the Enphase IQ7/IQ8 platform with documented deployments dating back to 2012-2019.

Alternatives

All Sungrow inverters

Inverter Power Euro eff. MPPT Weight Difference

Sungrow S1000S-L 1 kW 95.4% - 3.5 kg You are here

S1000S 1 kW 95.4% - 3.5 kg Similar on paper

NEO 1000M-X (WiFi) 1 kW - 2 3.1 kg Similar on paper

NEO 1000M-X (LoRa) 1 kW - 2 3.1 kg Similar on paper

SUN-M100G3-US-Q0 1 kW - 2 3.5 kg Similar on paper

SUN-M100G3-EU-Q0 1 kW - 2 3.5 kg Similar on paper

S800S 0.8 kW 95.4% - 3.5 kg -0.2 kW

NEO 800M-X (WiFi) 0.8 kW - 2 3.1 kg -0.2 kW

NEO 800M-X (LoRa) 0.8 kW - 2 3.1 kg -0.2 kW

About the S450S-L/S1000S-L/S2000S-L series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this model's own.

What are the differences between the S450S-L, S1000S-L, and S2000S-L models, and which one should I choose?

The key differences lie in output power and the number of independent MPPT inputs. The S450S-L supports a single PV module with one MPPT tracker and a rated output of 450 W. The S1000S-L connects two modules and features two independent MPPT inputs with output up to 1000 W. The S2000S-L is designed for four modules with four independent MPPT trackers and output up to 2000 W. The more complex the roof geometry and the greater the number of roof facets, the more advantageous it becomes to choose a higher-capacity model.

Do the Sungrow S450S-L/S1000S-L/S2000S-L microinverters handle shading from a chimney or dormer window?

Yes, this is a fundamental advantage of this series over a central string inverter. Each microinverter operates exclusively with its assigned PV modules, so shading on one module caused by a chimney, antenna, or dormer window does not reduce the output of the remaining modules. In a conventional string installation, a single shaded panel degrades the performance of the entire string. The S450S-L/S2000S-L series is particularly recommended for rooftops with obstructions or multiple facets oriented in different directions.

How many MPPT inputs do the S450S-L/S1000S-L/S2000S-L microinverters have, and what does that mean in practice?

The S450S-L features 1 MPPT input, the S1000S-L has two, and the S2000S-L has four independent MPPT inputs. Each tracker independently seeks the maximum power point of its assigned module, which is particularly significant when modules face different cardinal directions or are mounted at different tilt angles. As a result, an east-facing module and a south-facing module can each operate at full efficiency simultaneously without mutually degrading each other's output.

How does system monitoring work for an installation built on Sungrow S1000S-L or S2000S-L microinverters?

The series features a built-in extended-range WLAN module and integrates with the iSolarCloud platform. From within the app, you can monitor per-module production in real time, receive fault alerts, and perform remote firmware updates on the devices. This is especially useful for rapid fault diagnosis without requiring a physical inspection of the roof.

Do the Sungrow S450S-L/S2000S-L microinverters operate reliably in winter and under Polish weather conditions?

Yes. The series operates across a temperature range of -40°C to +60°C and is housed in an IP67-rated enclosure, providing full protection against dust ingress and water jets. An advanced thermal management design maintains rated output power even at elevated summer temperatures. The high European efficiency rating ensures that the inverter sustains strong performance under variable irradiance and partial-load conditions typical of the Polish climate.

What warranty is offered on the Sungrow S450S-L/S1000S-L/S2000S-L microinverters?

Sungrow provides a standard manufacturer's warranty for this microinverter series, and many authorized distributors in Europe offer extensions up to 10 or 25 years. The exact scope and duration of the warranty depend on the country of sale and the specific commercial partner. It is therefore advisable to confirm the warranty terms in writing before signing a contract with an installer.

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