Huawei SUN2000 15KTL-M2 – 15 kW 3-phase inverter for larger roofs

The Huawei SUN2000 15KTL-M2 is a powerful 15 kW 3-phase string inverter for larger homes, farms and commercial installations. This high-current version offers no less than 27 A input current per MPPT, which makes it perfect for modern, high-power solar panels and longer strings.

With a maximum efficiency of up to 98,65%, integrated type II surge protection, arc-fault detection (AFCI) and optional Huawei SUN2000-450W-P optimisers, you build an efficient and safe PV system that is ready for the future.

Key benefits of the Huawei SUN2000 15KTL-M2

• 15 kW 3-phase power – ideal for larger solar panel installations on 3×400 V + N connections.
• High efficiency – maximum efficiency of up to 98,65% and a European efficiency of 98,30%.
• High-current design – maximum input current of 27 A per MPPT and 39 A short-circuit current; suitable for powerful panels and long strings.
• 2 MPP trackers with 4 DC inputs – flexible string design for different roof surfaces or east/west layouts.
• Optimiser ready – fully compatible with the Huawei SUN2000-450W-P power optimiser for up to 30% higher yield with shade and complex roofs.
• Built-in safety – DC isolator, anti-islanding, AC/DC surge protection, residual current monitoring and integrated PID recovery.
• Smart communication – RS485 and WLAN as standard via the FusionSolar app; expandable with Smart Dongles for Ethernet or 4G.
• Robust and quiet – IP65, natural convection cooling (no noisy fans) and suitable for indoor and outdoor mounting.

Application: when do you choose the 15KTL-M2?

The Huawei SUN2000 15KTL-M2 is a logical choice if you:

• Have a 3-phase connection 3×400 V + N.
• Want to connect roughly between 15 and 22,5 kWp of solar panels (depending on the design).
• Work with high-power panels that deliver higher currents.
• Are looking for a reliable, efficient inverter for a larger house, farm, business building or ground-mounted system.

Technical specifications Huawei SUN2000 15KTL-M2

Efficiency

• Max. efficiency: 98,65%
• European efficiency: 98,30%

DC input (PV)

• Recommended max. PV power: 22.500 Wp
• Max. input voltage: 1.080 V
• Operating voltage range: 160 – 950 V
• Start-up voltage: 200 V
• Nominal input voltage: 600 V
• Max. input current per MPPT: 27 A
• Max. short-circuit current per MPPT: 39 A
• Number of MPP trackers: 2
• Max. number of DC inputs: 4

AC output

• Grid connection: 3-phase
• Nominal AC power: 15.000 W
• Nominal apparent power: 15.000 VA
• Max. apparent power: 16.500 VA
• Nominal output voltage: 230/400 Vac, 3W + N + PE
• Nominal grid frequency: 50 / 60 Hz
• Maximum output current: 25,2 A
• Power factor: adjustable from 0,8 leading to 0,8 lagging
• THD (Total Harmonic Distortion): ≤ 3%

Functions & protections

• DC isolator on the input side
• Anti-islanding protection
• AC overcurrent and short-circuit protection
• AC surge protection
• DC reverse polarity protection
• DC surge protection: type II
• AC surge protection: suitable for type II SPD according to EN/IEC 61643-11
• Residual current monitoring unit
• Arc-fault protection (AFCI)
• Ripple-receiver control
• Integrated PID recovery

General data

• Operating temperature: -25 °C to +60 °C (derating above 45–50 °C)
• Relative humidity: 0–100%
• Max. operating altitude: up to 4.000 m (derating above 2.000 m)
• Cooling: natural convection
• Display: LED indicators, operation via the FusionSolar app (WLAN integrated)
• Communication: RS485; WLAN/Ethernet via Smart Dongle-WLAN-FE (optional); 4G/3G/2G via Smart Dongle-4G (optional)
• Weight (incl. mounting kit): 25 kg
• Dimensions (w × h × d): 525 × 470 × 262 mm
• Protection rating: IP65
• Optimiser compatibility: SUN2000-450W-P DC MBUS power optimiser

For detailed values and country-specific settings, always check the official Huawei datasheet and the local grid code.

Installation tips for DIY installers and professionals

• 1. Check your grid connection
  The SUN2000 15KTL-M2 is intended for 3×400 V + N. If you have a 3×230 V grid (without neutral), this inverter is not suitable.
• 2. String design according to voltage and current limits
  Take into account the maximum input current of 27 A per MPPT and the operating voltage range of 160–950 V. With modern panels of 400–600 W you often end up with relatively long strings; calculate this carefully, certainly at low winter temperatures (Voc).
• 3. Spread roof surfaces across both MPPTs
  Place different orientations (for example south and east/west) on separate MPP trackers. When using optimisers you have extra freedom, but it remains wise to group shade and roof surfaces logically.
• 4. Positioning the inverter
  Mount the inverter on a solid wall, free of vibration, out of direct sunlight and with sufficient free space all around (above/below/sides) for cooling and servicing.
• 5. Set up communication straight away
  After commissioning, add the inverter to the FusionSolar app immediately, configure RS485 or dongles and check that monitoring and any export limits work correctly.
• 6. Do not forget the grid code
  During commissioning, set the correct country code/grid code (for example VDE-AR-N 4105, EN 50549, C10/11, etc.) so that the inverter operates neatly in line with the requirements of your grid operator.

Buying the Huawei SUN2000 15KTL-M2 at Stralendgroen

At Stralendgroen we are happy to help you put together a complete Huawei SUN2000 system: from inverter and optimisers to cabling and overcurrent protection. Whether you install it yourself or work together with an installer – we think along with you about string design, grid connection and future expansions.

Are you hesitating between several power ratings, or would you like to be sure that the 15KTL-M2 is a good fit for your roof and connection? Feel free to send us a sketch or photo of your meter cabinet and roof layout, and we will work it out together.

Datasheet