Skip to main content
Huawei

SUN2000-33KTL-NH

33.3 kW Grid-tie Three-phase
Compare with closest alternative Datasheet PDF
Rated AC (kW)
33.30
Weak · bottom 6%
Euro eff. (%)
-
Not published
MPPT
4
Typical · median 4
Max DC (V)
1100
Typical · median 1100 V
Weight (kg)
43.0
Typical · median 64.0 kg
Warranty (yrs)
-
Not published

The Huawei SUN2000-KTL-NH series are grid-tie inverters designed for three-phase systems where stable operation, fast diagnostics, and flexible PV string design are crucial. Their key advantage is multi-string MPPT, which helps achieve better yields under varying panel orientations and partial shading conditions - the inverter effectively "searches" for the optimal operating point for different strings.

Practically, high European efficiency is also important, meaning significantly better energy utilization in typical Polish climate conditions, where installations often operate under variable sunlight and transitional temperatures.

The installation is managed via the FusionSolar monitoring system, featuring production monitoring, alarms, and operational history, with communication available through Wi-Fi or Ethernet (e.g., via Smart Dongle). This series is an excellent choice for residential and small commercial installations where reliability, stability, compliance with grid connection requirements, and the standard manufacturer's warranty matter.

Ranking

243 inverters from 30 to 100 kW
Metric This inverter Median Position in class Rank in class
European efficiency - 98.2% Not published -
MPPT trackers 4 4 Typical 34
Max DC input voltage 1100 V 1100 V Typical 3
Weight per kW 1.3 1.1 Typical 150
Warranty - 5 yrs Not published -
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Specifications

Open datasheet PDF
Rated AC power 33.3 kW Continuous output
Max AC power 38.00 kW Short-term output above the rating
Max apparent power 38.00 kVA
Phases Three-phase
Max AC current 45.8 A
Power factor 0.8 leading – 0.8 lagging
Harmonic distortion (THD) 5.0 %
Max DC voltage 1100 V Caps the string length
MPPT voltage range 200 to 1000 V
Start-up voltage 200 V
MPPT trackers 4 2 strings each
Max input current per MPPT 26.0 A Must exceed the panel's Imp
Max short-circuit current per MPPT 40.0 A Must exceed the panel's Isc
Max efficiency 98.8 % Best single operating point
Dimensions 530 × 681 × 270 mm Height × width × depth
Weight 43.0 kg 1.3 kg per kW
Enclosure IP66
Cooling natural
Operating temperature -25 to 60 °C
Max humidity 100 %
Max altitude 3000 m
Protocols RS485USBApp
Protection AFCISurge protection
Certifications EN/IEC 62109-1EN/IEC 62109-2IEC 61727IEC 62116JEAC 9701-2016

Pros and cons

5 positive · 1 caution
What owners get
Three Independent MPPT Inputs (6 Strings)

The SUN2000-KTL-NH series features three separate MPPT channels supporting a total of six PV strings. The inverter independently optimizes the operating point for each string pair, which can reduce system losses by several percentage points compared to single-MPPT inverters when dealing with different roof orientations or partial shading.

Fanless Cooling + IP65 Enclosure

Thermal management relies entirely on natural convection - the absence of fans eliminates the primary source of mechanical failure in inverters and reduces operational noise. The IP65-rated enclosure provides full protection against dust ingress and water jets, contributing to longer trouble-free operation under typical installation conditions.

Built-in AFCI Protection (IEC 63027:2023)

The inverter detects and interrupts DC arc faults in under 0.5 seconds, meeting the requirements of IEC 63027:2023. The feature is enabled by default and incurs no additional hardware costs - in competing entry-level series, AFCI protection is often a paid option or entirely unavailable.

FusionSolar Monitoring + Smart Dongle AP+STA

The Smart Dongle SDongleA-05 (2.4 GHz Wi-Fi + Fast Ethernet) simultaneously supports local communication with the app and remote data transmission via a router. A single dongle manages up to 10 inverters concurrently. The FusionSolar platform provides production monitoring, alarm history, and diagnostics without requiring additional communication gateways.

BNEF Tier-1 Manufacturer, 10-Year Warranty

Huawei is classified as a Tier-1 manufacturer by Bloomberg NEF, confirming the financial capacity to honor warranty claims. The standard warranty covers 10 years with a declared service response time of under 3 business days - favorable compared to competitors offering 5-year base warranties.

Trade-offs
AFCI Incompatible with Third-Party Optimizers

According to the technical documentation for the SUN2000-(20KTL-M3, 33KTL-NH, 40KTL-NH), the AFCI function operates exclusively with Huawei optimizers or standard PV modules - SolarEdge, Tigo, and APsystems optimizers are not supported. This lack of compatibility may be a constraint in projects requiring mixed hardware infrastructure.

Alternatives

All Huawei inverters
Inverter Power Euro eff. MPPT Weight Difference
Huawei SUN2000-33KTL-NH 33.3 kW - 4 43.0 kg You are here
SE33.3K 33.3 kW 98.0% - 32.0 kg 11.0 kg lighter
SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) 33.3 kW 98.0% - 48.0 kg 5.0 kg heavier
Fronius Verto 33.3 33.3 kW 97.8% 4 41.8 kg 1.2 kg lighter
SE33.3KUS (KUS33.3SE) 33.3 kW - - 45.0 kg 2.0 kg heavier
MID 33KTL3-X 33 kW 98.5% - 29.5 kg -0.3 kW, 13.5 kg lighter
SG33CX 33 kW 98.3% - 50.0 kg -0.3 kW, 7.0 kg heavier
SG33T-P2-CN 33 kW 98.3% 3 25.0 kg -0.3 kW, -1 MPPT, 18.0 kg lighter

About the SUN2000-KTL-NH series

6 answered

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

How many MPPT channels does the Huawei SUN2000-KTL-NH inverter have, and why does it matter?
The SUN2000-KTL-NH series features 3 independent MPPT channels supporting a total of 6 PV strings. This allows the inverter to simultaneously track the optimal operating point for roof sections with different orientations or tilt angles. In practice, this translates to higher energy yields on dual-pitch roof installations or when one string experiences partial shading, without causing losses on the remaining strings.
What is the efficiency of the Huawei SUN2000-KTL-NH inverter, and how much energy is actually lost during conversion?
KTL-NH series models achieve a maximum efficiency of approximately 98.8% and a European efficiency of approximately 98.4%. The European efficiency figure is more representative for real-world conditions in Central Europe, as it accounts for operation under variable irradiance. This means that for every 1 kWh generated by the PV panels, less than 16 Wh is lost in the DC/AC conversion process.
How do you connect FusionSolar monitoring to a Huawei SUN2000-KTL-NH inverter?
Monitoring via the FusionSolar application requires a Smart Dongle (e.g., SDongleA-05), which connects to the inverter's USB or RS485 port. The dongle supports both Wi-Fi and Ethernet connectivity, and once configured in the app it provides real-time visibility into energy production, alarm history, and diagnostics. A wired Ethernet connection is recommended when the Wi-Fi signal at the inverter installation point is unstable.
Can the Huawei SUN2000-KTL-NH inverter be used with an energy storage system?
The SUN2000-KTL-NH series consists of grid-tie inverters without built-in energy storage support. They do not integrate directly with the LUNA2000 battery in the way that hybrid models from the SUN2000-KTL-M1 or SUN2000-KTL-M3 series do. If you plan to add energy storage, you will need to select a Huawei hybrid inverter or a separate system with a dedicated battery inverter.
What warranty is provided for inverters in the Huawei SUN2000-KTL-NH series?
Huawei provides a standard 5-year warranty on SUN2000-KTL-NH series inverters in the commercial and industrial segment. Extended warranty coverage of up to 10 years is available through the manufacturer's service program. As a Tier 1 company with a global service network, Huawei ensures the availability of spare parts and technical support locally.
What types of installations is the Huawei SUN2000-KTL-NH series suited for - residential or commercial?
The KTL-NH models (33 kW and 40 kW) are three-phase inverters designed primarily for small to medium-sized commercial installations, such as manufacturing facilities, warehouses, and office buildings with a three-phase grid connection. For typical residential installations (5-15 kW), smaller Huawei series such as the SUN2000-KTL-M1 or KTL-M2 are a better fit.
Compare with alternative