Deye

Deye SUN-20K-G02-LV

20 kW Grid-tie Three-phase

Compare with closest alternative Datasheet PDF

Rated AC (kW)

20.00

Typical for its class

Euro eff. (%)

98.0

Typical · median 98.0%

MPPT

Strong · top 6%

Max DC (V)

800

Weak · bottom 6%

Weight (kg)

44.5

Typical · median 35.0 kg

Warranty (yrs)

Not published

The Deye SUN-K-G02-LV series are three-phase grid-tie inverters designed for installations operating in low-voltage environments. In practice, this means stable operation under demanding grid connection conditions and features that facilitate adapting the device to the realities of the installation site-from larger homes to commercial setups. The key advantage of this series is multi-string MPPT (with up to four strings in selected models), which allows better utilization of energy from modules with different orientations and partial shading, instead of losing the yield on the entire string.

From the perspective of profitability, the high European efficiency is crucial-excellent performance under typical installation operating conditions, not just in ideal laboratory settings. For daily operation, features like smart monitoring and remote management, including parameterization and software updates, are invaluable. Another significant benefit is remote emergency shutdown, which enhances service and site safety. This series targets users who prioritize control, reliability, and easy O&M-not just 'any grid inverter'.

Ranking

227 inverters from 12 to 30 kW

Metric This inverter Median Position in class Rank in class

European efficiency 98.0% 98.0% Typical 77

MPPT trackers 4 2 Strong · top 6% 1

Max DC input voltage 800 V 1000 V Weak · bottom 6% 206

Weight per kW 2.2 1.6 Typical 166

Warranty - 5 yrs Not published -

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

Specifications

Open datasheet PDF

Rated AC power 20 kW Continuous output

Max AC power 22.00 kW Short-term output above the rating

Phases Three-phase

Nominal AC voltage 220 V 176Vac~242Vac (may vary with grid standards)

Max AC current 57.8 A

Grid frequency 60 Hz Range 57~62 Hz

Power factor 0.8 leading to 0.8 lagging

Harmonic distortion (THD) 2.0 %

Max DC input power 26.00 kW DC/AC ratio 1.30

Max DC voltage 800 V Caps the string length

MPPT voltage range 200 to 700 V

Start-up voltage 250 V

MPPT trackers 4 3 strings each

Max input current per MPPT 40.0 A Must exceed the panel's Imp

European efficiency 98.0 % Weighted across part loads

Max efficiency 98.7 % Best single operating point

Dimensions 537 × 648 × 304 mm Height × width × depth

Weight 44.5 kg 2.2 kg per kW

Enclosure IP65

Cooling forced-air

Noise 45 dB

Operating temperature -25 to 65 °C

Max humidity 100 %

Max altitude 2000 m

Interfaces Wi-FiEthernetDisplay

Protocols RS485RS232WiFiLAN

Protection DC switchSurge protection

Certifications EN50549IEC61727VDE 0126-1-1IEC62109-1IEC62109-2EN61000-6-1EN61000-6-3

Pros and cons

5 positive · 3 caution

What owners get

4 independent MPPT tracks (20-35 kW)

The SUN-20/25/30/35K-G02-LV models are equipped with 4 MPPT tracks (compared to 2 MPPT in the 10-15 kW models of the same series), which allows for independent tracking of the maximum power point for arrays with different orientations or partial shading - instead of degrading the entire string. This is a key advantage over many competing entry-level models, where 2 MPPT is the standard at this power level.

Maximum efficiency: 98.6% / European average: ~98.2%

Data from the manufacturer's datasheet and ENF Solar confirms a maximum efficiency of 98.6% and an European standard efficiency of approximately 98.2%, with an MPPT efficiency exceeding 99%. These figures place the series among the leading three-phase grid-tie inverters of this power class, comparable to Growatt MTL10000TL3-X (98.3%) or SolarEdge SE10K (98.3%).

Capable of handling 127/220 V and 133/230 V (two-wire) power supplies.

The series operates on both 127/220 Vac (standard in the Southern United States) and 133/230 Vac (Europe) networks, with a wide output voltage range of 176-242 V. The tolerance for fluctuations in the distribution network extends the operation time of the inverter when the power supply is unstable - an advantage for industrial facilities with poor-quality power grids.

IP65 rating, operating temperature range: -25°C to +65°C, lifespan: >20 years

The IP65 sealing class provides protection against dust and water ingress without the need for installation within an enclosure. The wide operating temperature range (-25°C to +65°C) and the specified lifespan of >20 years meet tier-1 standards - as confirmed in the technical documentation (ManualsLib, SUN-20K-G02-LV User Manual).

VSG, Remote Shutdown, and Zero Export

The Virtual Synchronous Generator (VSG) function improves stability during operation with weak network nodes - a feature that is rare in inverters in this price range. Remote Shutdown meets service safety requirements (RSD), and Zero Export enables compliance with prosumer regulations without the need for an external controller.

Trade-offs

Warranty: Labor costs covered for 5 out of every 10 years.

The Deye warranty documentation for Europe (version 2023) confirms that: the first 5 years cover parts and labor, while the 6-10 years cover only parts. This means that potential on-site service costs may arise in the second half of the warranty period, while SMA (Sunny Tripower) offers the option to extend full service coverage for up to 10 years, including labor, as part of the SMA Smart Connected service.

The G02 platform is gradually being replaced by G04/G05.

Within the same product family, Deye has introduced the G04-LV and G05-LV series (available from approximately 2022-2023), featuring an expanded range of power options and improved grid functionalities. While the G02-LV (2021) is not being discontinued, new projects may prefer the newer platform, which could potentially limit the availability of dedicated firmware in the future.

Deye Cloud - incomplete localization for the EU market

Polish and European installers report issues on forums (elektroda.pl, laczynasnapiecie.pl) regarding the automatic translation of the Deye Cloud application interface from Chinese, as well as the instability of mobile notifications. This makes it difficult to monitor installations daily without English proficiency and reduces the user experience compared to dedicated EU platforms (e.g., SolarEdge mySolarEdge, Fronius Solar.web).

Alternatives

All Deye inverters

Inverter Power Euro eff. MPPT Weight Difference

Deye SUN-20K-G02-LV 20 kW 98.0% 4 44.5 kg You are here

MID 20KTL3-X 20 kW 98.6% 2 23.0 kg +0.6 pp efficiency, -2 MPPT, 21.5 kg lighter

Fronius Verto 20.0 20 kW 98.3% 4 35.2 kg +0.3 pp efficiency, 9.3 kg lighter

SG20KTL-M 20 kW 98.3% 2 24.0 kg -2 MPPT, 20.5 kg lighter

SUN2000-20KTL-M2 20 kW 98.3% 2 25.0 kg -2 MPPT, 19.5 kg lighter

SUN2000-20KTL-M0 20 kW 98.3% 2 25.0 kg -2 MPPT, 19.5 kg lighter

SG20T-P2-CN 20 kW 98.3% 2 19.0 kg -2 MPPT, 25.5 kg lighter

SG20RT-20 20 kW 98.2% 2 20.0 kg -2 MPPT, 24.5 kg lighter

SOFAR 20KTLX-G3 20 kW 98.2% 2 22.0 kg -2 MPPT, 22.5 kg lighter

About the SUN-K-G02-LV series

6 answered

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

What power capabilities are available in the Deye SUN-K-G02-LV series?

The SUN-K-G02-LV series includes models with power outputs ranging from 10 kW to 35 kW: available options include 10K, 12K, 15K, 20K, 25K, 30K, and 35K. Each model is a three-phase, grid-connected inverter, designed for commercial and larger installations. This wide range of power outputs allows the device to be used in both large homes and small manufacturing facilities without over-sizing the installation.

What distinguishes the SUN-K-G02-LV series from standard three-phase inverters produced by Deye?

The key difference lies in the voltage of the network for which this series is designed: SUN-K-G02-LV supports 127/220 V and 133/230 V (50/60 Hz) systems, making it specifically suitable for low-voltage installations. Furthermore, the startup voltage is only 250 V instead of the typical 600 V, allowing the inverter to start earlier in the morning and operate longer in the evening, thus generating more energy per day.

How many MPPT strings does the Deye SUN-K-G02-LV inverter have, and is it important to consider this?

Larger models in the series (20-35 kW) are equipped with four independent MPPT (Maximum Power Point Tracking) strings, while smaller models have two. This has a significant impact on performance: if the modules are mounted on different orientations or a portion of the roof is shaded by a chimney or trees, each MPPT string operates independently. Shading of one string does not reduce the performance of the others, which can translate to several percent more energy annually in real-world conditions.

What is the efficiency of the SUN-K-G02-LV series of inverters in Europe?

The European efficiency of the SUN-K-G02-LV series is 98.2%, with a maximum of 98.6%. European efficiency is a more important indicator than peak efficiency, as it takes into account real operating conditions throughout the year, including partial loads on cloudy days. Even a small difference in efficiency, when the power is between 20 and 35 kW, can translate into hundreds of kilowatt-hours more or less per year.

What warranty does the Deye SUN-K-G02-LV inverter cover, and what does it cover?

The standard warranty for the SUN-K-G02-LV series inverters is 5 years. Deye offers the option to extend the warranty to 10 years, which is particularly important for a device with a 20-25 year lifespan. Before purchasing, it is advisable to confirm that the distributor in Poland handles warranty claims locally, which reduces the time required for potential repairs and eliminates transportation costs to foreign countries.

Does the Deye SUN-K-G02-LV inverter support remote monitoring and remote emergency shutdown?

Yes, the SUN-K-G02-LV series features an intelligent monitoring system with the ability to remotely manage parameters and update software via the internet. An important safety feature is the remote emergency shutdown, which allows a technician or property owner to disconnect the inverter without physical access to the installation. This is particularly important during network outages, maintenance work, or in the event of a fire.

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