--- title: "SolarEdge TerraMax Inverter SE330K Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "SolarEdge TerraMax Inverter SE330K 330 kW grid-tie inverter. Specs: 98.8% European efficiency, 1500 V max DC input, 175.0 kg, 5 yrs warranty." source: "https://comparepv.com/inverter/solaredge-solaredge-terramax-inverter-se330k" updated: 2026-01-16 --- # SolarEdge TerraMax Inverter SE330K ## Identity - **Manufacturer:** SolarEdge - **Model:** SolarEdge TerraMax Inverter SE330K - **Series:** SolarEdge TerraMax - **Rated AC power:** 330 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 95 inverters from 100 to 500 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | 98.8% | 98.6% | Strong - top 21% | 5 | | MPPT trackers | - | 10 | | | | Max DC input voltage | 1500 V | 1100 V | Strong - top 24% | 1 | | Weight per kW | 0.5 | 0.6 | Typical | 40 | | Warranty | 5 yrs | 5 yrs | Typical | 2 | ## Specification ### AC output - **Rated AC power:** 330 kW - **Max apparent power:** 330.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 690 V - **Max AC current:** 276.1 A - **Grid frequency:** 50 Hz - **Power factor:** 0.2–1 (leading/lagging) - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC input power:** 660.00 kW - **Max DC voltage:** 1500 V ### Efficiency - **European efficiency:** 98.8 % - **Max efficiency:** 99.2 % ### Physical - **Dimensions:** 914 × 1090 × 416 mm - **Weight:** 175.0 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Noise:** 72 dB - **Operating temperature:** -40 to 60 °C ### Connectivity and protection - **Interfaces:** Wi-Fi, Ethernet - **Protocols:** CAN bus, RS485, Ethernet, Wi‑Fi, Cellular (optional) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Warranty:** 5 years - **Certifications:** IEC 62109, AS3100 (certification pending), VDE-AR-N 4110, VDE-AR-N 4120, EN 50549-2, C10/11, AS 4777 (certification pending), G99 Type A and B (certification pending), CEI 0-16, NTS, TOR Erzeuger Typ B, C, D, IEC/EN 61000-6-2, IEC 61000-6-4, EN 55011, CISPR 11, IEC 62920, RoHS ### Pros - **99% Inverter Efficiency with Module-Level MPPT** - The TerraMax achieves 99% efficiency (per the SE330K datasheet), and its DC-optimized architecture with H1300 power optimizers provides an independent MPPT per module. In practice, this delivers higher energy yields on utility-scale sites with uneven terrain, mixed tracker orientations, or localized shading compared to conventional string inverters without optimizers. - **Strings up to 80 Modules - 50% BoS Cost Reduction** - Support for strings of up to 80 modules (25 kW per string) at 1500 V DC enables a dramatic reduction in DC cabling and combiner box count. SolarEdge claims BoS cost savings of up to 50% versus traditional string solutions - a significant advantage for ground-mount and agrivoltaic installations. - **IP68 Enclosure and -40…+65°C Operating Range** - The IP68-rated enclosure (fully sealed against dust and pressurized water ingress) allows deployment on floating PV systems and in high-humidity, high-dust environments without additional protective housings. The operating temperature ceiling of 65°C ensures full rated output power in hot climates and during summer peak-production periods. - **SafeDC - Service and Fire Safety Compliance** - The SafeDC feature automatically reduces DC voltage to a safe touch voltage level whenever the inverter or AC supply is switched off. This directly addresses fire-safety code requirements (NEC, VDE) and is critical for O&M inspections and emergency response operations at large-scale PV plants. - **200% DC Oversizing and Integrated PID Correction** - DC-to-AC oversizing of up to 200% allows energy production to be maximized during peak irradiance hours with fewer inverter units. The built-in nightly PID (potential-induced degradation) correction actively protects modules against degradation - particularly important in systems using thin-film panels or long string configurations. ### Cons - **Manufacturer Financial Risk - Four Rounds of Layoffs** - Between 2024 and 2025, SolarEdge carried out four rounds of workforce reductions (totaling more than 1,800 positions, including the dissolution of its energy storage division), while revenues in Q3 2024 declined 64% year-over-year. Goldman Sachs analysts have raised concerns about the company's ability to service $350 million in bonds maturing in September 2025, creating meaningful long-term risk to warranty support continuity and spare-parts availability over a typical 20-30-year project lifespan. - **Higher CAPEX: Mandatory H1300 Optimizer per Module** - The TerraMax architecture requires a dedicated H1300 power optimizer at every PV module, increasing capital expenditure and the total number of potential failure points compared to central inverter solutions - such as the Huawei FusionSolar SUN2000-330KTL or SMA Sunny Highpower PEAK3 - where optimizers are not required. For utility-scale sites with simple, homogeneous array layouts, the CAPEX premium may not be offset by the corresponding yield gains. ## About this series The SolarEdge TerraMax series are high-power grid-tie inverters designed for ground installations, where system flexibility and maximizing yields on uneven terrain, different roof orientations, and local shading are crucial. Key features include operation in a DC-optimized architecture with power optimizers, minimizing module mismatch losses and giving service access to module-level visibility-problems are located faster, and downtime is reduced. In practice, this addresses many typical challenges for PV farms, agrivoltaics, and floating projects. TerraMax offers multiple independent MPPT trackers, facilitating the connection of strings with different orientations and lengths and providing more stable operation under partial shading. High European efficiency means fewer losses in real-world Polish climate conditions and more energy fed into the grid annually. Monitoring and analytics operate within the SolarEdge ONE ecosystem, with remote communication and alarms for O&M. Everything is complemented by **SafeDC safety features**, network compliance, and **manufacturer’s warranty with extension option**, making the series a reliable choice for commercial and industrial installations. ## Questions ### What system size is the SolarEdge TerraMax inverter suited for, and in which project types does it perform best? The SolarEdge TerraMax is a utility-scale inverter rated up to 330 kW (model SE330K) with a DC input voltage of up to 1500 V. It supports 200% DC oversizing, meaning up to 660 kW of panel capacity per unit. The manufacturer targets it at ground-mounted, agrivoltaic, and floating PV installations, where large surface areas and variable operating conditions demand a flexible system architecture. ### Is the SolarEdge TerraMax suitable for agrivoltaic farms and floating PV installations? Yes, the SolarEdge TerraMax is officially designed for use cases including agrivoltaics and floating PV installations. H1300 power optimizers operating at the module level eliminate mismatch losses caused by varying table tilt angles, uneven terrain, or localized shading above crops. Module-level monitoring via the SolarEdge ONE platform reduces service response times at hard-to-access sites. ### What is the efficiency of the SolarEdge TerraMax inverter, and does it matter under Polish climate conditions? The TerraMax achieves an inverter efficiency of 99%, resulting in minimal energy conversion losses. In Poland, where a significant portion of the system's operating days involve overcast skies and variable irradiance, a high European efficiency rating translates into a measurably greater number of kilowatt-hours delivered to the grid over the course of a year compared with lower-efficiency devices. ### How long are the module strings supported by the SolarEdge TerraMax, and what cost savings does this enable on the installation? When paired with H1300 power optimizers, the TerraMax supports strings of up to 80 modules - significantly longer than conventional string-based solutions. This results in fewer DC cables, fewer connections, and less ancillary hardware. According to SolarEdge data, Balance of System (BoS) costs can be up to 50% lower than those associated with traditional string inverters of equivalent power rating. ### What warranty covers SolarEdge TerraMax inverters? SolarEdge inverters are covered as standard by a 12-year manufacturer's warranty, with extension options available. As a utility-scale product, the TerraMax series may be subject to individually negotiated warranty terms within EPC contracts. Before purchasing, it is advisable to confirm the current warranty scope directly with the distributor or the SolarEdge office in Poland, as terms may vary depending on project scale. ### What is the SafeDC feature in the SolarEdge TerraMax, and why is it important for service safety? SafeDC is a built-in safety mechanism that automatically reduces the DC voltage of the entire installation to a safe touch-voltage level upon grid loss, emergency shutdown, or fault detection. PV farm service crews can work safely on DC wiring without manually disconnecting each string individually, reducing intervention time and lowering the risk of accidents at large-scale installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/se-terramax-inverter-and-h1300-power-optimizer-datasheet-eng-e7755074ba71.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SOFAR 330KTLX0](https://comparepv.com/inverter/sofar-solar-sofar-330ktlx0) | 330 kW | 98.8% | | 113.0 kg | 62.0 kg lighter | | [Sungrow SG333HX](https://comparepv.com/inverter/sungrow-sg333hx) | 333 kW | 98.8% | 12 | 116.0 kg | +3.0 kW, 59.0 kg lighter | | [Growatt MAX 333K-X](https://comparepv.com/inverter/growatt-max-333k-x) | 333 kW | 98.5% | 6 | 126.0 kg | +3.0 kW, 49.0 kg lighter | | [Growatt MAX 320K-X](https://comparepv.com/inverter/growatt-max-320k-x) | 320 kW | 98.5% | 6 | 126.0 kg | -10.0 kW, 49.0 kg lighter | | [Sungrow SG320HX](https://comparepv.com/inverter/sungrow-sg320hx) | 320 kW | | 12 | 116.0 kg | -10.0 kW, 59.0 kg lighter | | [Sungrow SG350HX-US](https://comparepv.com/inverter/sungrow-sg350hx-us) | 320 kW | | 12 | 122.0 kg | -10.0 kW, 53.0 kg lighter | | [GoodWe GW320K-UT](https://comparepv.com/inverter/goodwe-gw320k-ut) | 320 kW | | 15 | 124.0 kg | -10.0 kW, 51.0 kg lighter | | [GoodWe GW320KH-UT](https://comparepv.com/inverter/goodwe-gw320kh-ut) | 320 kW | | 15 | 124.0 kg | -10.0 kW, 51.0 kg lighter | --- Source: https://comparepv.com/inverter/solaredge-solaredge-terramax-inverter-se330k