What kind of inverter is the Huawei SUN2000-50KTL-M3?
- Type: 3-phase string inverter (400 Vac), rated AC output 50 kW (max 55 kVA), for commercial/industrial projects
- Efficiency: up to 98.5% (European Efficiency 98.0%)
- MPPT: 4 trackers with 8 inputs in total, max DC voltage 1,100 V
- Safety: active, AI-powered arc-fault protection (AFCI) + Type II surge arresters on both DC/AC
- Durability: IP66 dust and water rating, operates -25 to 60°C, outdoor-ready
For solar projects of 50 kW and up, the inverter is the heart of the system — it decides both the energy harvest and the safety of the installation across decades of service. This page summarises the real specs of the Huawei SUN2000-50KTL-M3 — a popular inverter for factory rooftop solar and hotels and resorts (guides in Thai) as well as commercial buildings — with everything referenced from the manufacturer's datasheet, and the original PDF available for download at the end of the page.
What is the SUN2000-50KTL-M3
The SUN2000-50KTL-M3 is a string inverter in Huawei's Smart PV Controller line. It converts the direct current (DC) from the solar panels into three-phase 400 Vac alternating current (AC) feeding the building's electrical system, with a rated AC output of 50,000 W and a maximum apparent power of 55,000 VA. Internally it is transformerless, cooled by intelligent fans (Smart Air Cooling), and the unit measures 640 × 530 × 270 mm at 49 kg including the mounting plate.
What makes it right for commercial work is a flexible DC side: 4 independent MPPTs with 8 inputs in total, a max voltage of 1,100 V and a wide MPPT operating range of 200–1,000 V. That lets you design panel strings across multi-plane, multi-aspect roofs, so shade or a poor tilt angle in one zone never drags down the output of another.
Datasheet highlights
- Up to 98.5% efficiency — very little of what the panels produce is lost in conversion (European Efficiency 98.0%)
- Active AFCI arc-fault protection — AI-powered arc detection cuts the fire risk on the DC side, the main hazard zone of any solar system
- Complete protection set — anti-islanding, AC overcurrent protection, DC reverse polarity protection, Type II surge arresters on both the DC and AC sides, DC insulation detection, residual current monitoring and per-string fault monitoring
- Integrated PID Recovery — reverses panel degradation from the PID effect in-unit, supporting P-type modules (mono, poly) and N-type (nPERT, HIT)
- More yield with optimizers — per the datasheet, pairing with optimizers (supported models: MERC-1100/1300W-P) recovers up to 30% more energy on shaded sites
- Flexible communications — built-in WLAN + app, RS485, MBUS, and an optional Smart Dongle in WLAN/Ethernet or 4G/3G/2G versions for remote monitoring
- IP66 weatherproofing — high-grade dust and water protection, operating from -25 to 60°C at 0–100% RH and up to 4,000 m altitude — ready for outdoor mounting in a climate like Phuket's
Key spec table
| Item | SUN2000-50KTL-M3 spec |
|---|---|
| Max efficiency | 98.5% (European Efficiency 98.0%) |
| Rated AC power | 50,000 W (max apparent power 55,000 VA) |
| Output voltage | 400 Vac / 480 Vac, 3W+(N)+PE · 50/60 Hz |
| Output current | Rated 72.2 A, max 79.8 A (@400 Vac) |
| MPPTs / inputs | 4 MPPTs / 8 inputs (max 30 A per MPPT, 20 A per input) |
| DC voltage | Max 1,100 V · MPPT range 200–1,000 V · start-up 200 V |
| Protection | AFCI, anti-islanding, Type II surge (DC/AC), DC insulation detection, RCMU, PID Recovery |
| Communication | LED + WLAN/app, RS485, MBUS, optional Smart Dongle (WLAN-FE / 4G) |
| Ingress protection | IP66 · Smart Air Cooling |
| Operating environment | -25°C to 60°C · 0–100% RH · up to 4,000 m altitude |
| Dimensions / weight | 640 × 530 × 270 mm / 49 kg (mounting plate included) |
| Other | Transformerless · THD <3% · night consumption ≤5.5 W · IEC 62109-1/-2 and more |
All specs referenced from Huawei's datasheet — download the full document from the button at the end of the page.
Who it's for
The SUN2000-50KTL-M3 is built for commercial solar systems of 50 kW and up on three-phase power, such as
- Factories and warehouses — wide metal-sheet roofs and heavy daytime loads that line up exactly with when solar produces (Thai guide: factory rooftop solar)
- Hotels and resorts — air-conditioning, pumps and kitchens running all day long (Thai guide: solar for hotels and resorts in Phuket)
- Commercial buildings, offices and large retail — anywhere a meaningful cut to the monthly base electricity bill matters
For projects larger than 50 kW — say 100–500 kW — system designers typically run several of these inverters together in one system, each looking after its own zone of panels. That spreads the risk and makes maintenance easier. Our team designs the unit count and string layout around the reality of each site (compare other brands in our Thai-language guide to inverter and panel brands, or browse all the equipment we install)
Summary
The Huawei SUN2000-50KTL-M3 is a 3-phase 50 kW inverter that delivers high efficiency (98.5%), string-design flexibility (4 MPPTs / 8 inputs) and a complete safety package from AFCI through Type II surge protection, all in an IP66 body built for outdoor conditions. It's a natural heart for factory, hotel and commercial-building solar systems. Planning a system of 50 kW or more? Contact our team for a free site survey and system design, no obligation