Description
The SMA Sunny Tripower CORE1 STP 33-US-41 is the world's first free-standing commercial PV inverter, purpose-built to reduce installation time, labor costs, and complexity on rooftops, carports, and ground-mount systems.
Key Features
- Fully Integrated Free-Standing Design No additional racking required for rooftop installation, with integrated DC and AC disconnects, overvoltage protection, and 12 direct string inputs reducing labor and material costs by up to 60%.
- Six Independent MPP Trackers Delivers maximum power production with flexible stringing configurations and ShadeFix string-level shade management for optimized energy harvest.
- Next-Gen DC AFCI Arc-Fault Protection Certified to UL 1699B Ed. 1, providing industry-leading arc-fault protection alongside integrated SunSpec PLC signal for 2017 NEC rapid shutdown compliance.
- SMA Smart Connected Monitoring Built-in I-V curve diagnostics, intelligent string performance monitoring, and proactive O&M support minimize field service time and maximize system uptime.
- ennexOS Energy Management Platform Enables comprehensive commercial energy solutions with Integrated Plant Control and Q on Demand 24/7 reactive power support for increased system ROI.
The STP 33-US-41 delivers 33,300W AC nominal power at 97.5% CEC efficiency, accepting up to 50,000Wp DC array power across a 150–1000V MPPT operating range. Its OptiCool variable-speed forced convection cooling system maintains reliable thermal management across a -25°C to +60°C operating range.
Certified to UL 1741, UL 1741 SA/SB, UL 1699B Ed. 1, UL 3741, and IEEE 1547-2018, the CORE1 meets California Rule 21, HECO SRD V2.0, and all major US grid interconnection standards. Advanced grid support capabilities include L/HFRT, L/HVRT, Volt-VAr, Volt-Watt, Frequency-Watt, and Ramp Rate Control for full utility compliance.
Network connectivity includes dual Ethernet ports, RS485, and optional WLAN, with SMA Modbus, SunSpec IEEE 1547 Modbus, and Webconnect data protocols supported as standard. A 10-year standard warranty with optional extensions to 15 or 20 years makes the CORE1 a long-term, low-risk commercial investment.
Technical Specifications
| Specification | Details |
|---|---|
| Model | STP 33-US-41 |
| AC Nominal Power | 33,300W |
| Maximum Apparent Power | 33,300 VA |
| Maximum Array Power (DC) | 50,000 Wp STC |
| Maximum System Voltage | 1000V |
| Rated MPP Voltage Range | 330–800V |
| MPPT Operating Voltage Range | 150–1000V |
| Minimum DC Voltage / Start Voltage | 150V / 188V |
| MPP Trackers / Strings per MPP | 6 / 2 |
| Max Usable Input Current | 120A total / 20A per MPP tracker |
| Max Short Circuit Current (MPPT / String) | 32A / 30A |
| Output Phases / Line Connections | 3 / 3-(N)-PE |
| Nominal AC Voltage | 480V / 277V WYE |
| AC Voltage Range | 244–305V |
| Maximum Output Current | 40A |
| Rated Grid Frequency | 60Hz |
| Power Factor at Rated Power | 1 (adjustable 0.0 leading to 0.0 lagging) |
| THD | <3% |
| CEC Efficiency | 97.5% |
| Topology | Transformerless |
| Cooling | OptiCool (forced convection, variable speed fans) |
| Operating Temperature Range | -25°C to +60°C (-13°F to +140°F) |
| Storage Temperature Range | -40°C to +70°C (-40°F to +158°F) |
| Audible Noise (full power @ 1m) | 65 dB(A) |
| Internal Consumption at Night | 5W |
| Enclosure Protection Rating | Type 4X, 3SX (UL 50E) |
| Max Relative Humidity | 100% non-condensing |
| Mounting | Free-standing with included mounting feet |
| DC Connection | Amphenol UTX PV or H4Plus connectors |
| AC Connection | Screw terminals 4 AWG to 4/0 AWG CU/AL |
| Network Interfaces | Ethernet (2 ports), RS485, WLAN (optional) |
| Data Protocols | SMA Modbus, SunSpec IEEE 1547 Modbus, Webconnect |
| Dimensions (W x H x D) | 621 x 733 x 569 mm (24.4 x 28.8 x 22.4 in) |
| Weight | 185 lbs (84 kg) |
| Certifications | UL 1741, UL 1699B Ed. 1, UL 1998, UL 3741, CSA 22.2 107-1 |
| Grid Standards | IEEE 1547-2018, UL 1741 SA/SB, CA Rule 21, HECO SRD V2.0 |
| FCC Compliance | FCC Part 15 Class A |
| Standard Warranty | 10 Years |
| Optional Warranty Extension | 15 / 20 Years |
Specs & Info