Sungrow SG33CX-P2 33 kW Commercial 3‑Phase PV Inverter
- 33 kW three‑phase string inverter for medium and large commercial PV systems, with up to 46.2 kWp DC input.
- High efficiency up to 98.5% to maximise energy yield from rooftop or ground‑mount arrays.
- Robust IP66, C5‑rated enclosure and integrated surge protection for demanding UK industrial and coastal sites.
The Sungrow SG33CX‑P2 is a 33 kW three‑phase string inverter designed for commercial and industrial solar installations that need reliable, efficient power conversion with straightforward operation and maintenance. It supports up to 46.2 kWp of PV, with three independent MPPTs and built‑in protection features suitable for commercial installations and smaller solar farms. Energian supplies this inverter with UK‑based technical support and can connect you with trusted installation partners where needed.
Main features and benefits
- High yield with max. 98.5% efficiency and wide 160–1000 V MPPT range for flexible string design.
- Three independent MPPT inputs, two strings per MPPT, to handle different roof orientations and partial shading.
- Integrated DC Type I+II and AC Type II surge protection, AFCI and built‑in DC switch for safer operation on commercial sites.
- Smart O&M functions including IV curve diagnosis, grid fault record and PV string current monitoring to support remote diagnostics.
- IP66, C5 corrosion‑resistant, transformerless design with smart forced‑air cooling, suitable for outdoor mounting up to 4000 m altitude.
Typical applications
- Rooftop PV on warehouses, logistics hubs and distribution centres.
- Commercial rooftops for retail parks, offices and light industrial buildings.
- Ground‑mount arrays for small solar farms, business parks and agricultural sites.
For larger projects, multiple SG33CX‑P2 inverters can be combined within a three‑phase distribution system, subject to appropriate electrical design and local DNO requirements. We recommend using experienced commercial solar installers; Energian can introduce trusted partners on request.
Technical specifications
Input (DC)
- Recommended max. PV input power: 46.2 kWp.
- Max. PV input voltage: 1100 V.
- Min. PV input voltage / start‑up input voltage: 160 V / 200 V.
- Rated PV input voltage: 600 V.
- MPP voltage range: 160 V – 1000 V.
- Number of independent MPPT inputs: 3.
- Number of PV strings per MPPT: 2.
- Max. PV input current: 90 A (30 A × 3).
- Max. DC short‑circuit current: 120 A (40 A × 3).
- Max. current for DC connector: 20 A.
Output (AC)
- Rated AC output power: 33 kW.
- Max. AC output apparent power: 36.3 kVA.
- Max. AC output current: 55.2 A.
- Rated AC output current (at 230 V): 47.8 A.
- Rated AC voltage: 3 / N / PE, 220 / 380 V, 230 / 400 V.
- AC voltage range: 312 – 480 V.
- Rated grid frequency: 50 Hz / 60 Hz.
- Grid frequency range: 45 – 55 Hz / 55 – 65 Hz.
- Total harmonic distortion (THD): < 3 % at rated power.
- Power factor at rated power / adjustable power factor: > 0.99 / 0.8 leading to 0.8 lagging.
- Feed‑in phases / connection phases: 3 / 3‑N‑PE.
Efficiency
- Max. efficiency: 98.5 %. European efficiency: 98.3 %.
Protection
- Grid monitoring: Yes.
- DC reverse connection protection: Yes.
- AC short‑circuit protection: Yes.
- Leakage current protection: Yes.
- Surge protection: DC Type I+II / AC Type II.
- Ground fault monitoring: Yes.
- Integrated DC switch: Yes.
- PV string current monitoring: Yes.
- Arc fault circuit interrupter (AFCI): Yes.
- PID recovery function: Yes.
General data
- Dimensions (W × H × D): 645 × 575 × 245 mm.
- Mounting method: Wall‑mounting bracket.
- Weight: 38 kg.
- Topology: Transformerless.
- Degree of protection: IP66.
- Corrosion classification: C5.
- Night power consumption: < 5 W.
- Operating ambient temperature range: −30 to 60 °C.
- Allowable relative humidity range (non‑condensing): 0 – 100 %.
- Cooling method: Smart forced‑air cooling.
- Max. operating altitude: 4000 m.
- Display: LED, Bluetooth + App.
- Compatible optimiser: SP600S (optional).
- Communication: RS485; optional WLAN, Ethernet.
- DC connection type: EVO2 (max. 6 mm²).
- AC connection type: OT terminal (16 – 35 mm²).
- AC cable specification: Outside diameter 18 – 38 mm.
Grid compliance and support
- Grid compliance: IEC 62109, IEC 61727, IEC 62116, VDE‑AR‑N 4105:2018, IEC 61000‑6‑3, EN 50549‑1, CEI 0‑21 2019, CEI 0‑16 2019, VDE 0126‑1‑1/A1 VFR 2019, UTE C15‑712‑1:2013, UNE 206007‑1/RD 1699, UNE 217002, G99.
- Grid support functions: Q at night, LVRT, HVRT, active and reactive power control, power ramp rate control.
Shipping information
Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If a shipping rate is not shown at checkout, please contact us on +44 2080640335 or info@energian.co.uk for a tailored quote.
UK expert support
Energian provides UK‑based technical support for the Sungrow SG33CX‑P2, including help with system design, product selection and commissioning queries. For installations, we recommend working with qualified solar PV contractors; we can introduce trusted partners experienced with commercial three‑phase systems.
If you have any questions before or after purchase, contact us via phone, email or live chat, or visit our office for an in‑person consultation.